use gridcraft_core::{CellRef, Value};
use serde_json::json;

use crate::Session;

fn s() -> Session {
    let mut s = Session::new();
    s.new_workbook();
    s
}

fn v(s: &Session, a: &str) -> Value {
    s.doc().unwrap().wb.active().unwrap().value(CellRef::parse(a).unwrap())
}

#[test]
fn entering_empty_cells_preserves_whole_sheet_formatting() {
    let mut s = s();
    s.execute("cell.set", json!({"cell": "A1", "input": "existing"})).unwrap();
    s.execute("selection.set", json!({"range": "A1:XFD1048576"})).unwrap();
    s.execute("home.alignCenter", json!({})).unwrap();
    let border = gridcraft_model::BorderLine { style: gridcraft_model::BorderStyle::Thin, color: gridcraft_model::Color::Auto };
    s.execute("home.formatCells", json!({"style": {"borders": {"top": border, "bottom": border, "left": border, "right": border}}})).unwrap();
    let expected = {
        let d = s.doc().unwrap();
        d.wb.styles.get(d.wb.active().unwrap().style_id(CellRef::parse("B1").unwrap())).clone()
    };
    assert_eq!(expected.align.h, gridcraft_model::HAlign::Center);
    for (cell, input) in [("A1", "edited"), ("B1", "new"), ("C1", "=1+2"), ("XFD1048576", "edge")] {
        s.execute("cell.set", json!({"cell": cell, "input": input})).unwrap();
        let d = s.doc().unwrap();
        assert_eq!(d.wb.styles.get(d.wb.active().unwrap().style_id(CellRef::parse(cell).unwrap())), &expected, "{cell}");
    }
    s.execute("range.setValues", json!({"range": "D1", "values": [["text", 7, true]]})).unwrap();
    for cell in ["D1", "E1", "F1"] {
        let d = s.doc().unwrap();
        assert_eq!(d.wb.styles.get(d.wb.active().unwrap().style_id(CellRef::parse(cell).unwrap())), &expected, "{cell}");
    }
    s.execute("edit.undo", json!({})).unwrap();
    assert!(v(&s, "D1").is_empty());
    s.execute("edit.redo", json!({})).unwrap();
    let d = s.doc().unwrap();
    assert_eq!(d.wb.styles.get(d.wb.active().unwrap().style_id(CellRef::parse("D1").unwrap())), &expected);
    assert_eq!(d.wb.active().unwrap().cells.len(), 7);
    let (reopened, _) = gridcraft_xlsx::read_xlsx(&gridcraft_xlsx::write_xlsx(&d.wb).unwrap()).unwrap();
    for cell in ["A1", "B1", "C1", "D1", "E1", "F1", "G1", "XFD1048576"] {
        assert_eq!(
            reopened.styles.get(reopened.active().unwrap().style_id(CellRef::parse(cell).unwrap())),
            &expected,
            "{cell} after XLSX round trip"
        );
    }
}

#[test]
fn editing_a_name_renames_it_in_formulas() {
    // Name Manager › Edit…: `oldName` edits the name in place; formulas that use it follow.
    let mut s = s();
    s.execute("cell.set", json!({"cell": "A1", "input": "21"})).unwrap();
    s.execute("formulas.defineName", json!({"name": "Price", "refersTo": "=Sheet1!$A$1"})).unwrap();
    s.execute("formulas.defineName", json!({"name": "Other", "refersTo": "=1"})).unwrap();
    s.execute("cell.set", json!({"cell": "B1", "input": "=Price*2"})).unwrap();
    let err = s.execute("formulas.defineName", json!({"name": "Other", "refersTo": "=Sheet1!$A$1", "oldName": "Price"}));
    assert!(err.is_err(), "renaming onto another existing name is refused");
    s.execute("formulas.defineName", json!({"name": "Cost", "refersTo": "=Sheet1!$A$1", "comment": "unit", "oldName": "Price"})).unwrap();
    let d = s.doc().unwrap();
    let names: Vec<&str> = d.wb.names.iter().map(|n| n.name.as_str()).collect();
    assert_eq!(names, ["Other", "Cost"]);
    let b1 = d.wb.active().unwrap().cell(CellRef::parse("B1").unwrap()).and_then(|c| c.formula.clone()).unwrap();
    assert_eq!(b1.text, "Cost*2");
    assert_eq!(v(&s, "B1"), Value::number(42.0));
    assert!(s.execute("formulas.defineName", json!({"name": "X", "oldName": "Missing"})).is_err());
}

#[test]
fn entry_and_text_paste_use_inherited_formats_and_cell_overrides() {
    let mut s = s();
    s.execute("home.bold", json!({"range": "B:B", "on": true})).unwrap();
    s.execute("home.formatCells", json!({"range": "3:3", "style": {"num_fmt": "@", "font": {"italic": true}}})).unwrap();
    s.execute("home.fontColor", json!({"range": "B3", "color": "#FF0000"})).unwrap();
    let expected = {
        let d = s.doc().unwrap();
        d.wb.styles.get(d.wb.active().unwrap().style_id(CellRef::parse("B3").unwrap())).clone()
    };
    s.execute("cell.set", json!({"cell": "B3", "input": "=1+2"})).unwrap();
    s.execute("cell.set", json!({"cell": "C3", "input": "00123"})).unwrap();
    s.execute("edit.paste", json!({"at": "D3", "text": "=2+3\t00456"})).unwrap();
    assert_eq!(v(&s, "B3"), Value::text("=1+2"));
    assert_eq!(v(&s, "C3"), Value::text("00123"));
    assert_eq!(v(&s, "D3"), Value::text("=2+3"));
    assert_eq!(v(&s, "E3"), Value::text("00456"));
    s.execute("cell.set", json!({"cell": "B4", "input": "12%"})).unwrap();
    let d = s.doc().unwrap();
    let sh = d.wb.active().unwrap();
    assert_eq!(d.wb.styles.get(sh.style_id(CellRef::parse("B3").unwrap())), &expected);
    for cell in ["C3", "D3", "E3"] {
        let st = d.wb.styles.get(sh.style_id(CellRef::parse(cell).unwrap()));
        assert!(st.font.italic);
        assert!(!st.font.bold, "row style takes precedence over column style");
        assert_eq!(st.num_fmt.as_str(), "@");
    }
    let percent = d.wb.styles.get(sh.style_id(CellRef::parse("B4").unwrap()));
    assert!(percent.font.bold);
    assert_ne!(percent.num_fmt.as_str(), "General");
}

#[test]
fn enter_values_and_formulas() {
    let mut s = s();
    s.execute("cell.set", json!({"cell": "A1", "input": "10"})).unwrap();
    s.execute("cell.set", json!({"cell": "A2", "input": "32"})).unwrap();
    s.execute("cell.set", json!({"cell": "A3", "input": "=sum(a1:a2"})).unwrap();
    assert_eq!(v(&s, "A3"), Value::Number(42.0));
    assert!(s.execute("cell.set", json!({"cell": "A4", "input": "=1+*2"})).is_err());
    s.execute("cell.set", json!({"cell": "B1", "input": "12%"})).unwrap();
    let d = s.doc().unwrap();
    let sh = d.wb.active().unwrap();
    assert_eq!(crate::display::cell_text(&d.wb, sh, CellRef::parse("B1").unwrap()), "12%");
}

#[test]
fn undo_redo() {
    let mut s = s();
    s.execute("cell.set", json!({"cell": "A1", "input": "1"})).unwrap();
    s.execute("cell.set", json!({"cell": "A1", "input": "2"})).unwrap();
    s.execute("edit.undo", json!({})).unwrap();
    assert_eq!(v(&s, "A1"), Value::Number(1.0));
    s.execute("edit.redo", json!({})).unwrap();
    assert_eq!(v(&s, "A1"), Value::Number(2.0));
    assert!(s.doc().unwrap().is_dirty());
}

#[test]
fn shape_text_edit_undo_redo_and_noop() {
    let mut s = s();
    let id = s.execute("insert.textBox", json!({"at": "C4", "width": 210, "height": 90, "text": "Original"})).unwrap()["shape"].clone();
    let original = s.doc().unwrap().wb.active().unwrap().shapes[0].clone();
    let mut changed = original.clone();
    changed.text = "First line\n\nSecond line & <text>".into();
    let undo_len = s.doc().unwrap().undo.len();
    s.execute("shape.setText", json!({"id": id, "text": changed.text})).unwrap();
    assert_eq!(s.doc().unwrap().wb.active().unwrap().shapes[0], changed);
    assert_eq!(s.doc().unwrap().undo.len(), undo_len + 1);
    s.execute("edit.undo", json!({})).unwrap();
    assert_eq!(s.doc().unwrap().wb.active().unwrap().shapes[0], original);

    let before_noop = s.doc().unwrap().wb.clone();
    let revision = s.doc().unwrap().revision;
    s.execute("shape.setText", json!({"id": id, "text": "Original"})).unwrap();
    assert!(std::sync::Arc::ptr_eq(&s.doc().unwrap().wb, &before_noop));
    assert_eq!(s.doc().unwrap().revision, revision);
    assert_eq!(s.doc().unwrap().undo.len(), undo_len);
    assert_eq!(s.doc().unwrap().redo.len(), 1);
    s.execute("edit.redo", json!({})).unwrap();
    assert_eq!(s.doc().unwrap().wb.active().unwrap().shapes[0], changed);

    s.execute("shape.setText", json!({"id": id, "text": ""})).unwrap();
    assert_eq!(s.doc().unwrap().wb.active().unwrap().shapes[0].text, "");
    s.execute("edit.undo", json!({})).unwrap();
    assert_eq!(s.doc().unwrap().wb.active().unwrap().shapes[0], changed);
}

#[test]
fn shape_text_rejects_invalid_targets_and_params() {
    let mut s = s();
    let id = s.execute("insert.textBox", json!({"text": "Original"})).unwrap()["shape"].clone();
    let rectangle = s.execute("insert.shape", json!({"kind": "rectangle", "text": "Rectangle"})).unwrap()["shape"].clone();
    let before = s.doc().unwrap().wb.clone();
    let undo_len = s.doc().unwrap().undo.len();
    for params in [
        json!({}),
        json!({"id": id}),
        json!({"id": id, "text": 12}),
        json!({"id": "1", "text": "bad id"}),
        json!({"id": -1, "text": "bad id"}),
        json!({"id": 1.5, "text": "bad id"}),
        json!({"id": u64::from(u32::MAX) + 1, "text": "bad id"}),
        json!({"id": 999, "text": "unknown"}),
        json!({"id": rectangle, "text": "not a text box"}),
    ] {
        assert!(matches!(s.execute("shape.setText", params), Err(crate::EngineError::BadParams { .. })));
        assert!(std::sync::Arc::ptr_eq(&s.doc().unwrap().wb, &before));
        assert_eq!(s.doc().unwrap().undo.len(), undo_len);
    }
    s.execute("home.insertSheet", json!({})).unwrap();
    assert!(matches!(s.execute("shape.setText", json!({"id": id, "text": "wrong sheet"})), Err(crate::EngineError::BadParams { .. })));
    assert_eq!(s.doc().unwrap().wb.sheet(0).unwrap().shapes[0].text, "Original");
    assert!(s.doc().unwrap().wb.active().unwrap().shapes.is_empty());
}

#[test]
fn shape_text_respects_sheet_protection() {
    let mut s = s();
    let id = s.execute("insert.textBox", json!({"text": "Original"})).unwrap()["shape"].clone();
    s.execute("review.protectSheet", json!({})).unwrap();
    let before = s.doc().unwrap().wb.clone();
    let undo_len = s.doc().unwrap().undo.len();
    assert!(s.execute("shape.setText", json!({"id": id, "text": "Changed"})).is_err());
    assert!(std::sync::Arc::ptr_eq(&s.doc().unwrap().wb, &before));
    assert_eq!(s.doc().unwrap().undo.len(), undo_len);
    s.execute("review.unprotectSheet", json!({})).unwrap();
    s.execute("shape.setText", json!({"id": id, "text": "Changed"})).unwrap();
    assert_eq!(s.doc().unwrap().wb.active().unwrap().shapes[0].text, "Changed");
}

#[test]
fn shape_text_is_capped_like_a_cell() {
    let mut s = s();
    let id = s.execute("insert.textBox", json!({"text": "Original"})).unwrap()["shape"].clone();
    // The cap counts characters, not bytes.
    let longest = "é".repeat(32_767);
    s.execute("shape.setText", json!({"id": id, "text": longest})).unwrap();
    assert_eq!(s.doc().unwrap().wb.active().unwrap().shapes[0].text.chars().count(), 32_767);
    let undo_len = s.doc().unwrap().undo.len();
    let too_long = "x".repeat(32_768);
    assert!(matches!(s.execute("shape.setText", json!({"id": id, "text": too_long})), Err(crate::EngineError::BadParams { .. })));
    assert_eq!(s.doc().unwrap().wb.active().unwrap().shapes[0].text.chars().count(), 32_767);
    assert_eq!(s.doc().unwrap().undo.len(), undo_len);
}

#[test]
fn shape_text_edit_survives_xlsx_roundtrip() {
    let mut s = s();
    s.execute("insert.textBox", json!({"text": "Imported"})).unwrap();
    let saved = s.execute("file.saveBytes", json!({"format": "xlsx"})).unwrap();
    s.execute("file.open", json!({"name": "text-box.xlsx", "base64": saved["base64"]})).unwrap();
    let id = s.doc().unwrap().wb.active().unwrap().shapes[0].id;
    let text = "Edited & <escaped>\n\nLast line\n";
    s.execute("shape.setText", json!({"id": id, "text": text})).unwrap();
    let saved = s.execute("file.saveBytes", json!({"format": "xlsx"})).unwrap();
    s.execute("file.open", json!({"name": "edited.xlsx", "base64": saved["base64"]})).unwrap();
    let shape = &s.doc().unwrap().wb.active().unwrap().shapes[0];
    assert_eq!(shape.kind, gridcraft_model::ShapeKind::TextBox);
    assert_eq!(shape.text, text);
}

#[test]
fn no_border_clears_only_shared_edges_and_undo_restores_them() {
    use gridcraft_core::RangeRef;
    use gridcraft_model::{BorderLine, Borders};

    for (range, neighbors) in [
        ("B2", &[("B1", "bottom"), ("B3", "top"), ("A2", "right"), ("C2", "left")][..]),
        (
            "B2:C3",
            &[("B1", "bottom"), ("C1", "bottom"), ("B4", "top"), ("C4", "top"), ("A2", "right"), ("A3", "right"), ("D2", "left"), ("D3", "left")][..],
        ),
    ] {
        let mut s = s();
        s.execute("range.setValues", json!({"range": "A1", "values": [[1, 2, 3, 4], [5, 6, 7, 8], [9, 10, 11, 12], [13, 14, 15, 16]]})).unwrap();
        s.execute("cell.set", json!({"cell": "D4", "input": "=SUM(A1:C1)"})).unwrap();
        s.execute("home.bold", json!({"range": "A1:D4", "on": true})).unwrap();
        for preset in ["all", "diagonalDown"] {
            s.execute("home.borders", json!({"range": "A1:D4", "preset": preset, "style": "double", "color": "#CC3344"})).unwrap();
        }
        let before: Vec<_> = RangeRef::parse("A1:D4").unwrap().iter().map(|c| s.execute("cell.get", json!({"cell": c.a1()})).unwrap()).collect();
        s.execute("home.borders", json!({"range": range, "preset": "none"})).unwrap();
        let selected = RangeRef::parse(range).unwrap();
        for original in &before {
            let address = original["cell"].as_str().unwrap();
            let mut expected = original.clone();
            if selected.contains(CellRef::parse(address).unwrap()) {
                expected["style"]["borders"] = json!(Borders::default());
            } else if let Some((_, edge)) = neighbors.iter().find(|(cell, _)| *cell == address) {
                expected["style"]["borders"][*edge] = json!(BorderLine::default());
            }
            assert_eq!(s.execute("cell.get", json!({"cell": address})).unwrap(), expected, "clearing {range}, cell {address}");
        }
        s.execute("edit.undo", json!({})).unwrap();
        for original in before {
            assert_eq!(s.execute("cell.get", json!({"cell": original["cell"]})).unwrap(), original);
        }
    }
}

#[test]
fn no_border_handles_sheet_corners_without_creating_out_of_bounds_cells() {
    for (range, corner, neighbors) in [
        ("A1:B2", "A1", [("B1", "left"), ("A2", "top")]),
        ("XFC1048575:XFD1048576", "XFD1048576", [("XFC1048576", "right"), ("XFD1048575", "bottom")]),
    ] {
        let mut s = s();
        s.execute("home.borders", json!({"range": range, "preset": "all"})).unwrap();
        s.execute("home.borders", json!({"range": corner, "preset": "none"})).unwrap();
        for (neighbor, edge) in neighbors {
            assert_eq!(s.execute("cell.get", json!({"cell": neighbor})).unwrap()["style"]["borders"][edge]["style"], "None");
        }
        let sh = s.doc().unwrap().wb.active().unwrap();
        assert!(sh.cells.iter().all(|(c, _)| c.is_valid()));
        assert!(sh.cells.iter().count() <= 4);
    }
}

#[test]
fn borders_respect_sheet_formatting_protection() {
    let mut s = s();
    s.execute("home.borders", json!({"range": "A1:B2", "preset": "all"})).unwrap();
    s.execute("review.protectSheet", json!({})).unwrap();
    let before = s.doc().unwrap().wb.clone();
    let undo_count = s.doc().unwrap().undo.len();
    for preset in ["none", "left"] {
        assert!(s.execute("home.borders", json!({"range": "A1", "preset": preset})).is_err());
        assert_eq!(s.doc().unwrap().wb.styles, before.styles);
        assert_eq!(s.doc().unwrap().wb.active().unwrap().cells, before.active().unwrap().cells);
        assert_eq!(s.doc().unwrap().undo.len(), undo_count);
    }
    s.execute("review.protectSheet", json!({"formatCells": true})).unwrap();
    s.execute("home.borders", json!({"range": "A1", "preset": "none"})).unwrap();
    assert_eq!(s.execute("cell.get", json!({"cell": "B1"})).unwrap()["style"]["borders"]["left"]["style"], "None");
}

#[test]
fn copy_paste_shifts_formulas() {
    let mut s = s();
    s.execute("range.setValues", json!({"range": "A1", "values": [[1, 2], [3, 4]]})).unwrap();
    s.execute("cell.set", json!({"cell": "C1", "input": "=A1+B1"})).unwrap();
    s.execute("edit.copy", json!({"range": "C1"})).unwrap();
    s.execute("selection.set", json!({"range": "C2"})).unwrap();
    s.execute("edit.paste", json!({})).unwrap();
    assert_eq!(v(&s, "C2"), Value::Number(7.0));
    s.execute("edit.cut", json!({"range": "A1"})).unwrap();
    s.execute("selection.set", json!({"range": "E5"})).unwrap();
    s.execute("edit.paste", json!({})).unwrap();
    assert_eq!(v(&s, "E5"), Value::Number(1.0));
    let f = s.execute("cell.get", json!({"cell": "C1"})).unwrap();
    assert_eq!(f["formula"], "=E5+B1");
}

#[test]
fn rich_clipboard_copies_selected_displayed_cells_and_styles() {
    let mut s = s();
    s.execute("cell.set", json!({"cell": "A1", "input": "outside selection"})).unwrap();
    s.execute("range.setValues", json!({"range": "B2", "values": [[0.125, "<tag>&\"\nnext"], [0.25, "last"]]})).unwrap();
    s.execute("home.numberFormat", json!({"range": "B2:B3", "code": "0.0%"})).unwrap();
    s.execute("home.bold", json!({"range": "B2", "on": true})).unwrap();
    s.execute("home.italic", json!({"range": "B2", "on": true})).unwrap();
    s.execute("home.fontColor", json!({"range": "B2", "color": "#123456"})).unwrap();
    s.execute("home.fillColor", json!({"range": "B2", "color": "#FEDCBA"})).unwrap();
    let copied = s.execute("edit.copy", json!({"range": "B2:C3", "html": true})).unwrap();
    let html = copied["html"].as_str().expect("copy publishes HTML as well as plain text");
    assert_eq!(copied["text"], "12.5%\t\"<tag>&\"\"\nnext\"\n25.0%\tlast\n");
    assert!(html.starts_with("<table "));
    assert!(html.ends_with("</table>"));
    assert_eq!(html.matches("<tr>").count(), 2);
    assert_eq!(html.matches("<td ").count(), 4);
    assert!(html.contains("&lt;tag&gt;&amp;&quot;<br>next"));
    for content in ["12.5%", "25.0%", "font-weight:bold;", "font-style:italic;", "color:#123456;", "background:#FEDCBA;", "text-align:right;"] {
        assert!(html.contains(content), "missing {content}");
    }
    assert!(!html.contains("outside selection"));
    assert!(!html.contains("<html"));

    let cut = s.execute("edit.cut", json!({"range": "B2:C3", "html": true})).unwrap();
    assert_eq!(cut["html"], copied["html"]);
    assert_eq!(cut["text"], copied["text"]);
    s.execute("edit.paste", json!({"at": "E5", "text": cut["text"]})).unwrap();
    assert_eq!(v(&s, "E5"), Value::Number(0.125));
    assert_eq!(v(&s, "B2"), Value::Empty);
}

#[test]
fn copy_and_cut_return_html_only_when_requested() {
    let mut s = s();
    s.execute("cell.set", json!({"cell": "A1", "input": "x"})).unwrap();
    for cmd in ["edit.copy", "edit.cut"] {
        for params in [json!({"range": "A1"}), json!({"range": "A1", "html": false})] {
            let r = s.execute(cmd, params).unwrap();
            assert_eq!(r["text"], "x\n");
            assert!(r.get("html").is_none(), "{cmd} must not bloat programmatic responses with HTML");
        }
        let r = s.execute(cmd, json!({"range": "A1", "html": true})).unwrap();
        assert!(r["html"].as_str().is_some_and(|h| h.contains(">x</td>")));
    }
}

#[test]
fn rich_clipboard_clips_merges_and_skips_hidden_rows() {
    let mut s = s();
    s.execute("cell.set", json!({"cell": "B2", "input": "merged"})).unwrap();
    s.execute("home.mergeCenter", json!({"range": "B2:D5"})).unwrap();
    s.execute("home.hideRows", json!({"rows": "3:3"})).unwrap();
    s.execute("cell.set", json!({"cell": "E4", "input": "side"})).unwrap();
    let copied = s.execute("edit.copy", json!({"range": "B2:C4", "html": true})).unwrap();
    let html = copied["html"].as_str().expect("merged copy publishes HTML");
    assert_eq!(copied["text"], "merged\t\n\t\n");
    assert_eq!(html.matches("<tr>").count(), 2);
    assert_eq!(html.matches("<td ").count(), 1);
    assert!(html.contains("rowspan=\"2\" colspan=\"2\""));
    assert!(html.contains(">merged</td>"));

    // A selection beginning inside a merge must keep its shape without copying
    // the original anchor's value from outside the selected rectangle.
    let copied = s.execute("edit.copy", json!({"range": "C3:E5", "html": true})).unwrap();
    let html = copied["html"].as_str().expect("partially selected merge publishes HTML");
    assert_eq!(html.matches("<tr>").count(), 2);
    assert_eq!(html.matches("<td ").count(), 3);
    assert!(html.contains("rowspan=\"2\" colspan=\"2\""));
    assert!(!html.contains("merged"));
    assert!(html.contains(">side</td>"));
}

#[test]
fn rich_clipboard_omits_html_for_large_ranges_without_truncating_text() {
    let mut s = s();
    s.execute("cell.set", json!({"cell": "A10001", "input": "last cell"})).unwrap();
    let copied = s.execute("edit.copy", json!({"range": "A1:A10001", "html": true})).unwrap();
    assert!(copied.get("html").is_none(), "oversized HTML must be omitted, not partially copied");
    let text = copied["text"].as_str().unwrap();
    assert_eq!(text.lines().count(), 10_001);
    assert!(text.ends_with("last cell\n"));
    let copied = s.execute("edit.copy", json!({"range": "A10001", "html": true})).unwrap();
    assert!(copied["html"].as_str().is_some_and(|html| html.contains("last cell")));
}

#[test]
fn rich_clipboard_omits_html_when_escaping_exceeds_byte_budget() {
    let mut s = s();
    let text = "&".repeat(1_000_000);
    s.execute("range.setValues", json!({"range": "A1", "values": [[text]]})).unwrap();
    let copied = s.execute("edit.copy", json!({"range": "A1", "html": true})).unwrap();
    assert!(copied.get("html").is_none(), "an oversized escaped value must not produce partial HTML");
    assert_eq!(copied["text"].as_str().unwrap().len(), 1_000_001);
    assert!(copied["text"].as_str().unwrap().ends_with("&\n"));
}

#[test]
fn insert_delete_rows_adjust() {
    let mut s = s();
    s.execute("range.setValues", json!({"range": "A1", "values": [[1], [2], [3]]})).unwrap();
    s.execute("cell.set", json!({"cell": "B1", "input": "=SUM(A1:A3)"})).unwrap();
    s.execute("home.insertRows", json!({"rows": "2:2"})).unwrap();
    assert_eq!(s.execute("cell.get", json!({"cell": "B1"})).unwrap()["formula"], "=SUM(A1:A4)");
    s.execute("cell.set", json!({"cell": "A2", "input": "10"})).unwrap();
    assert_eq!(v(&s, "B1"), Value::Number(16.0));
    s.execute("home.deleteRows", json!({"rows": "1:1"})).unwrap();
    assert_eq!(v(&s, "B1"), Value::Empty);
    assert_eq!(v(&s, "A1"), Value::Number(10.0));
}

#[test]
fn inserting_or_deleting_cells_cancels_copy_mode() {
    let mut s = s();
    s.execute("range.setValues", json!({"range": "A1", "values": [[1], [2], [3]]})).unwrap();
    s.execute("edit.cut", json!({"range": "3:3"})).unwrap();
    s.execute("home.insertRows", json!({"rows": "3:3"})).unwrap();
    assert!(s.clipboard.is_none());
    // The cut data is now in row 4; a paste must not move the new blank row 3 instead.
    assert!(s.execute("edit.paste", json!({"at": "A10"})).is_err());
    assert_eq!(v(&s, "A4"), Value::Number(3.0));
    s.execute("edit.copy", json!({"range": "A:A"})).unwrap();
    s.execute("home.deleteColumns", json!({"cols": "B:B"})).unwrap();
    assert!(s.clipboard.is_none());
    s.execute("edit.copy", json!({"range": "A1"})).unwrap();
    s.execute("home.insertCells", json!({"range": "A1", "shift": "down"})).unwrap();
    assert!(s.clipboard.is_none());
    s.execute("edit.copy", json!({"range": "A2"})).unwrap();
    s.execute("home.deleteCells", json!({"range": "A1", "shift": "up"})).unwrap();
    assert!(s.clipboard.is_none());
}

#[test]
fn fill_series() {
    let mut s = s();
    s.execute("range.setValues", json!({"range": "A1", "values": [[1], [3]]})).unwrap();
    s.execute("edit.autoFill", json!({"source": "A1:A2", "target": "A1:A6"})).unwrap();
    assert_eq!(v(&s, "A6"), Value::Number(11.0));
    s.execute("cell.set", json!({"cell": "B1", "input": "Mon"})).unwrap();
    s.execute("edit.autoFill", json!({"source": "B1", "target": "B1:B3"})).unwrap();
    assert_eq!(v(&s, "B3"), Value::from("Wed"));
    s.execute("cell.set", json!({"cell": "C1", "input": "Item 9"})).unwrap();
    s.execute("edit.autoFill", json!({"source": "C1", "target": "C1:C2"})).unwrap();
    assert_eq!(v(&s, "C2"), Value::from("Item 10"));
}

#[test]
fn insert_delete_cells_adjust() {
    let formula = |s: &mut Session, a: &str| s.execute("cell.get", json!({"cell": a})).unwrap()["formula"].clone();
    let mut s = s();
    s.execute("range.setValues", json!({"range": "A1", "values": [[1], [2], [3], [4], [5]]})).unwrap();
    s.execute("cell.set", json!({"cell": "C1", "input": "=SUM(A1:A5)"})).unwrap();
    s.execute("cell.set", json!({"cell": "C2", "input": "=A4*10"})).unwrap();
    s.execute("cell.set", json!({"cell": "C3", "input": "=SUM(A1:B5)"})).unwrap();
    s.execute("formulas.defineName", json!({"name": "Fourth", "refersTo": "=Sheet1!$A$4"})).unwrap();
    s.execute(
        "home.conditionalFormat",
        json!({"range": "A4:A5", "rule": {"type": "cellIs", "operator": "greater", "value": "3", "preset": "redText"}}),
    )
    .unwrap();
    s.execute("data.validation", json!({"range": "A5", "type": "whole", "operator": "greater", "formula1": "0"})).unwrap();
    s.execute("insert.chart", json!({"range": "A1:A5", "type": "line"})).unwrap();
    // Insert A3 shifting down: ranges across the insertion grow, references below move.
    s.execute("home.insertCells", json!({"range": "A3", "shift": "down"})).unwrap();
    assert_eq!(formula(&mut s, "C1"), "=SUM(A1:A6)");
    assert_eq!(formula(&mut s, "C2"), "=A5*10");
    assert_eq!(formula(&mut s, "C3"), "=SUM(A1:B5)");
    assert_eq!(v(&s, "C2"), Value::Number(40.0));
    let sh = s.doc().unwrap().wb.active().unwrap().clone();
    assert_eq!(s.doc().unwrap().wb.names[0].formula, "Sheet1!$A$5");
    assert_eq!(sh.cond_formats[0].ranges[0].a1(), "A5:A6");
    assert_eq!(sh.validations[0].ranges[0].a1(), "A6");
    assert_eq!(sh.charts[0].series[0].values, "Sheet1!$A$1:$A$6");
    // Delete A5 (the 4) shifting up: references to it become #REF!, those below move up.
    s.execute("home.deleteCells", json!({"range": "A5", "shift": "up"})).unwrap();
    assert_eq!(formula(&mut s, "C1"), "=SUM(A1:A5)");
    assert_eq!(formula(&mut s, "C2"), "=#REF!*10");
    assert_eq!(s.doc().unwrap().wb.names[0].formula, "#REF!");
    assert_eq!(v(&s, "C1"), Value::Number(11.0));
    let sh = s.doc().unwrap().wb.active().unwrap().clone();
    assert_eq!(sh.cond_formats[0].ranges[0].a1(), "A5");
    assert_eq!(sh.validations[0].ranges[0].a1(), "A5");
    assert_eq!(sh.charts[0].series[0].values, "Sheet1!$A$1:$A$5");
    // Shifting right and left.
    s.execute("range.setValues", json!({"range": "E1", "values": [[1, 2, 3]]})).unwrap();
    s.execute("cell.set", json!({"cell": "E3", "input": "=G1+SUM(E1:G1)"})).unwrap();
    s.execute("home.insertCells", json!({"range": "F1", "shift": "right"})).unwrap();
    assert_eq!(formula(&mut s, "E3"), "=H1+SUM(E1:H1)");
    s.execute("home.deleteCells", json!({"range": "E1:F1", "shift": "left"})).unwrap();
    assert_eq!(formula(&mut s, "E3"), "=F1+SUM(E1:F1)");
    assert_eq!(v(&s, "E3"), Value::Number(8.0));
}

#[test]
fn sort_and_filter() {
    let mut s = s();
    s.execute("range.setValues", json!({"range": "A1", "values": [["Name", "Score"], ["b", 2], ["c", 3], ["a", 1]]})).unwrap();
    s.execute("selection.set", json!({"cell": "B2"})).unwrap();
    s.execute("data.sortDescending", json!({})).unwrap();
    assert_eq!(v(&s, "A2"), Value::from("c"));
    assert_eq!(v(&s, "A1"), Value::from("Name"));
    s.execute("data.filter", json!({})).unwrap();
    let r = s.execute("data.filterBy", json!({"column": "B", "custom": {"op": ">", "value": "1"}})).unwrap();
    assert_eq!(r["hiddenRows"], 1);
}

/// A sheet with locked data in A1:B3, unlocked cells in D1:D3 and row 10, then protected.
fn protected(extra: serde_json::Value) -> Session {
    let mut s = s();
    s.execute("range.setValues", json!({"range": "A1", "values": [[1], [2], [3]]})).unwrap();
    s.execute("cell.set", json!({"cell": "B1", "input": "=A1+D1"})).unwrap();
    s.execute("range.setValues", json!({"range": "D1", "values": [[10], [20], [30]]})).unwrap();
    s.execute("home.lockCell", json!({"range": "D1:D3", "on": false})).unwrap();
    s.execute("home.lockCell", json!({"range": "10:10", "on": false})).unwrap();
    s.execute("review.protectSheet", extra).unwrap();
    s
}

#[test]
fn protection_refuses_edits_of_locked_cells() {
    let refused = |s: &mut Session, id: &str, p: serde_json::Value| {
        let before = s.doc().unwrap().wb.clone();
        let e = s.execute(id, p).expect_err(id).to_string();
        assert!(e.contains("protected sheet"), "{id}: {e}");
        assert_eq!(*s.doc().unwrap().wb, *before, "{id} changed the workbook");
    };
    let mut s = protected(json!({}));
    refused(&mut s, "cell.set", json!({"cell": "A1", "input": "9"}));
    refused(&mut s, "edit.clearContents", json!({"range": "A1:A3"}));
    refused(&mut s, "edit.clearAll", json!({"range": "A1"}));
    refused(&mut s, "range.setValues", json!({"range": "A2", "values": [[9]]}));
    refused(&mut s, "range.fill", json!({"range": "A5:A6", "input": "x"}));
    refused(&mut s, "edit.fillDown", json!({"range": "A1:A3"}));
    refused(&mut s, "edit.fillRight", json!({"range": "A1:B1"}));
    refused(&mut s, "edit.fillUp", json!({"range": "A1:A3"}));
    refused(&mut s, "edit.fillLeft", json!({"range": "A1:B1"}));
    refused(&mut s, "edit.autoFill", json!({"source": "A1", "target": "A1:A5"}));
    s.execute("edit.copy", json!({"range": "D1"})).unwrap();
    refused(&mut s, "edit.paste", json!({"at": "A2"}));
    refused(&mut s, "edit.paste", json!({"at": "A2", "text": "x\ty"}));
    refused(&mut s, "home.deleteRows", json!({"rows": "2:2"}));
    refused(&mut s, "home.deleteColumns", json!({"cols": "A:A"}));
    refused(&mut s, "home.insertRows", json!({"rows": "1:1"}));
    refused(&mut s, "home.deleteCells", json!({"range": "A1", "shift": "up"}));
    refused(&mut s, "home.insertCells", json!({"range": "A1", "shift": "down"}));
    refused(&mut s, "edit.replace", json!({"what": "2", "with": "5"}));
    refused(&mut s, "data.goalSeek", json!({"set": "B1", "to": 50, "changing": "A1"}));
    // Unlocked cells stay editable.
    s.execute("edit.paste", json!({"at": "D2"})).unwrap();
    assert_eq!(v(&s, "D2"), Value::Number(10.0));
    s.execute("range.setValues", json!({"range": "D2", "values": [[5]]})).unwrap();
    s.execute("edit.fillDown", json!({"range": "D1:D3"})).unwrap();
    assert_eq!(v(&s, "D3"), Value::Number(10.0));
    s.execute("edit.clearContents", json!({"range": "D3"})).unwrap();
    assert_eq!(v(&s, "D3"), Value::Empty);
    s.execute("data.goalSeek", json!({"set": "B1", "to": 50, "changing": "D1"})).unwrap();
    assert!((v(&s, "B1").as_f64().unwrap() - 50.0).abs() < 0.001);
    s.execute("edit.replace", json!({"what": "49", "with": "48", "wholeCell": true})).unwrap();
    assert_eq!(v(&s, "A1"), Value::Number(1.0));
}

#[test]
fn protection_allows_permitted_row_and_column_edits() {
    let mut s = protected(json!({"insertRows": true, "deleteRows": true, "insertColumns": true}));
    // Inserting shifts locked cells, which the protection allows.
    s.execute("home.insertRows", json!({"rows": "1:1"})).unwrap();
    assert_eq!(v(&s, "A2"), Value::Number(1.0));
    s.execute("home.insertColumns", json!({"cols": "A:A"})).unwrap();
    // Deleting a row with locked cells isn't; deleting an unlocked row is.
    assert!(s.execute("home.deleteRows", json!({"rows": "2:2"})).is_err());
    s.execute("home.deleteRows", json!({"rows": "11:11"})).unwrap();
    assert!(s.execute("home.deleteColumns", json!({"cols": "Z:Z"})).is_err());
}

#[test]
fn hidden_formulas_stay_hidden_on_protected_sheets() {
    let mut s = s();
    s.execute("cell.set", json!({"cell": "A1", "input": "=SEQUENCE(3)*7"})).unwrap();
    s.execute("cell.set", json!({"cell": "B1", "input": "=1+1"})).unwrap();
    s.execute("home.formatCells", json!({"range": "A1", "style": {"protection": {"locked": true, "hidden": true}}})).unwrap();
    s.execute("formulas.showFormulas", json!({"on": true})).unwrap();
    let text = |s: &Session, a: &str| {
        let d = s.doc().unwrap();
        let sh = d.wb.active().unwrap();
        crate::display::cell_text(&d.wb, sh, CellRef::parse(a).unwrap())
    };
    assert_eq!(text(&s, "A1"), "=SEQUENCE(3)*7");
    assert_eq!(s.execute("edit.find", json!({"what": "SEQUENCE", "all": true})).unwrap()["count"], 1);
    s.execute("review.protectSheet", json!({})).unwrap();
    assert_eq!(text(&s, "A1"), "7");
    assert_eq!(text(&s, "B1"), "=1+1");
    let d = s.doc().unwrap();
    let sh = d.wb.active().unwrap();
    assert!(crate::display::formula_hidden(&d.wb, sh, CellRef::parse("A2").unwrap()));
    assert!(!crate::display::formula_hidden(&d.wb, sh, CellRef::parse("B1").unwrap()));
    assert!(s.execute("edit.find", json!({"what": "SEQUENCE", "all": true})).is_err());
    let r = s.execute("edit.find", json!({"what": "7", "all": true})).unwrap();
    assert_eq!(r["results"][0]["value"], "7");
}

#[test]
fn formatting_and_styles() {
    let mut s = s();
    s.execute("selection.set", json!({"range": "A1:B2"})).unwrap();
    s.execute("home.bold", json!({})).unwrap();
    s.execute("home.fillColor", json!({"color": "#FFFF00"})).unwrap();
    s.execute("home.mergeCenter", json!({})).unwrap();
    let c = s.execute("cell.get", json!({"cell": "B2"})).unwrap();
    assert_eq!(c["style"]["font"]["bold"], true);
    assert_eq!(c["merge"], "A1:B2");
    s.execute("home.cellStyle", json!({"range": "D1", "name": "Good"})).unwrap();
}

#[test]
fn spill_references_roundtrip_through_xlsx() {
    let mut s = s();
    s.execute("cell.set", json!({"cell": "B1", "input": "=SEQUENCE(4)"})).unwrap();
    s.execute("cell.set", json!({"cell": "C1", "input": "=sum(b1#)"})).unwrap();
    s.execute("formulas.defineName", json!({"name": "Seq", "refersTo": "=Sheet1!$B$1#"})).unwrap();
    s.execute("cell.set", json!({"cell": "C2", "input": "=MAX(Seq)"})).unwrap();
    assert_eq!(s.execute("cell.get", json!({"cell": "C1"})).unwrap()["formula"], "=SUM(B1#)");
    assert_eq!((v(&s, "C1"), v(&s, "C2")), (Value::Number(10.0), Value::Number(4.0)));
    let r = s.execute("file.saveBytes", json!({"format": "xlsx"})).unwrap();
    let b64 = r["base64"].as_str().unwrap().to_string();
    s.execute("file.open", json!({"name": "x.xlsx", "base64": b64})).unwrap();
    assert_eq!(s.execute("cell.get", json!({"cell": "C1"})).unwrap()["formula"], "=SUM(B1#)");
    assert_eq!(s.doc().unwrap().wb.names[0].formula, "Sheet1!$B$1#");
    assert_eq!((v(&s, "C1"), v(&s, "C2")), (Value::Number(10.0), Value::Number(4.0)));
}

#[test]
fn tables_and_structured_refs() {
    let mut s = s();
    s.execute("range.setValues", json!({"range": "A1", "values": [["Item", "Qty"], ["x", 2], ["y", 5]]})).unwrap();
    s.execute("insert.table", json!({"range": "A1:B3"})).unwrap();
    s.execute("cell.set", json!({"cell": "D1", "input": "=SUM(Table1[Qty])"})).unwrap();
    assert_eq!(v(&s, "D1"), Value::Number(7.0));
    s.execute("table.totalRow", json!({"on": true, "table": "Table1"})).unwrap();
    assert_eq!(v(&s, "B4"), Value::Number(7.0));
}

#[test]
fn create_names_from_selection() {
    let names = |s: &Session| -> Vec<(String, String)> {
        let mut v: Vec<_> = s.doc().unwrap().wb.names.iter().map(|n| (n.name.clone(), n.formula.clone())).collect();
        v.sort();
        v
    };
    let named = |n: &str, f: &str| (n.to_string(), f.to_string());
    let mut s = s();
    s.execute(
        "range.setValues",
        json!({"range": "A1", "values": [["", "Jan", "Feb", ""], ["North", 1, 2, "N"], ["South", 3, 4, "S"], ["", "First", "Second", ""]]}),
    )
    .unwrap();
    s.execute("formulas.createFromSelection", json!({"range": "A1:D4", "top": false, "bottom": true, "right": true})).unwrap();
    assert_eq!(
        names(&s),
        [named("First", "Sheet1!$B$1:$B$3"), named("N", "Sheet1!$A$2:$C$2"), named("S", "Sheet1!$A$3:$C$3"), named("Second", "Sheet1!$C$1:$C$3")]
    );
    // Existing names are kept unless replacing is asked for.
    let r = s.execute("formulas.createFromSelection", json!({"range": "A1:C3", "top": true, "left": true})).unwrap();
    assert_eq!(r["created"], 4);
    let r = s.execute("formulas.createFromSelection", json!({"range": "B1:C3", "top": true})).unwrap();
    assert_eq!((r["created"].clone(), r["skipped"].clone()), (json!(0), json!(["Jan", "Feb"])));
    s.execute("cell.set", json!({"cell": "B1", "input": "N"})).unwrap();
    let r = s.execute("formulas.createFromSelection", json!({"range": "B1:B3", "replace": true})).unwrap();
    assert_eq!(r["created"], 1);
    assert!(names(&s).contains(&named("N", "Sheet1!$B$2:$B$3")));
    assert!(names(&s).contains(&named("North", "Sheet1!$B$2:$C$2")));
}

#[test]
fn names_that_look_like_references_are_refused() {
    let mut s = s();
    for bad in ["R1C1", "r2", "C3", "RC", "R", "c", "rc12", "A1", "XFD1048576", "1st"] {
        assert!(s.execute("formulas.defineName", json!({"name": bad, "refersTo": "=1"})).is_err(), "{bad}");
    }
    for good in ["R1C1X", "Rate", "RCx", "Rx", "_R1", "Cost"] {
        s.execute("formulas.defineName", json!({"name": good, "refersTo": "=1"})).unwrap();
    }
}

#[test]
fn lambda_names_keep_their_case_in_calls() {
    let mut s = s();
    s.execute("formulas.defineName", json!({"name": "Double", "refersTo": "=LAMBDA(x,x*2)"})).unwrap();
    s.execute("formulas.defineName", json!({"name": "Quad", "refersTo": "=LAMBDA(x,Double(Double(x)))"})).unwrap();
    s.execute("cell.set", json!({"cell": "A1", "input": "=double(4)+Quad(1)+sum(1)"})).unwrap();
    assert_eq!(s.execute("cell.get", json!({"cell": "A1"})).unwrap()["formula"], "=Double(4)+Quad(1)+SUM(1)");
    assert_eq!(v(&s, "A1"), Value::Number(13.0));
    let r = s.execute("file.saveBytes", json!({"format": "xlsx"})).unwrap();
    let b64 = r["base64"].as_str().unwrap().to_string();
    s.execute("file.open", json!({"name": "x.xlsx", "base64": b64})).unwrap();
    assert_eq!(s.execute("cell.get", json!({"cell": "A1"})).unwrap()["formula"], "=Double(4)+Quad(1)+SUM(1)");
    let quad = s.doc().unwrap().wb.names.iter().find(|n| n.name == "Quad").unwrap().formula.clone();
    assert_eq!(quad, "LAMBDA(x,Double(Double(x)))");
    assert_eq!(v(&s, "A1"), Value::Number(13.0));
}

#[test]
fn sheets() {
    let mut s = s();
    s.execute("home.insertSheet", json!({})).unwrap();
    s.execute("cell.set", json!({"cell": "A1", "input": "5"})).unwrap();
    s.execute("sheet.rename", json!({"name": "Data"})).unwrap();
    s.execute("sheet.activate", json!({"sheet": 0})).unwrap();
    s.execute("cell.set", json!({"cell": "A1", "input": "=Data!A1*2"})).unwrap();
    assert_eq!(v(&s, "A1"), Value::Number(10.0));
    s.execute("sheet.rename", json!({"sheet": "Data", "name": "My Data"})).unwrap();
    assert_eq!(s.execute("cell.get", json!({"cell": "A1"})).unwrap()["formula"], "='My Data'!A1*2");
}

#[test]
fn sheet_operations_keep_names_on_their_sheets() {
    let names = |s: &Session| -> Vec<(String, Option<String>, String)> {
        let wb = &s.doc().unwrap().wb;
        let mut v: Vec<_> =
            wb.names.iter().map(|n| (n.name.clone(), n.scope.and_then(|i| wb.sheet(i)).map(|s| s.name.clone()), n.formula.clone())).collect();
        v.sort();
        v
    };
    let named = |n: &str, scope: Option<&str>, f: &str| (n.to_string(), scope.map(str::to_string), f.to_string());
    let mut s = s();
    s.execute("home.insertSheet", json!({"name": "Data"})).unwrap();
    s.execute("home.insertSheet", json!({"name": "Notes"})).unwrap();
    s.execute("formulas.defineName", json!({"name": "Rate", "refersTo": "=Data!$A$1", "scope": "Data"})).unwrap();
    s.execute("formulas.defineName", json!({"name": "Rate", "refersTo": "=Notes!$B$1", "scope": "Notes"})).unwrap();
    s.execute("formulas.defineName", json!({"name": "Total", "refersTo": "=Data!$C$1"})).unwrap();
    // Moving Data (index 1) to the end: its names go with it.
    s.execute("sheet.move", json!({"sheet": "Data", "to": 2})).unwrap();
    assert_eq!(names(&s), [named("Rate", Some("Data"), "Data!$A$1"), named("Rate", Some("Notes"), "Notes!$B$1"), named("Total", None, "Data!$C$1")]);
    // Copying Data to the front copies its sheet-level names, referring to the copy.
    s.execute("sheet.move", json!({"sheet": "Data", "to": 0, "copy": true})).unwrap();
    assert_eq!(s.doc().unwrap().wb.sheets[0].name, "Data (2)");
    assert_eq!(
        names(&s),
        [
            named("Rate", Some("Data"), "Data!$A$1"),
            named("Rate", Some("Data (2)"), "'Data (2)'!$A$1"),
            named("Rate", Some("Notes"), "Notes!$B$1"),
            named("Total", None, "Data!$C$1")
        ]
    );
    // Deleting Data removes its names; names referring to it become #REF!.
    s.execute("home.deleteSheet", json!({"sheet": "Data"})).unwrap();
    assert_eq!(
        names(&s),
        [named("Rate", Some("Data (2)"), "'Data (2)'!$A$1"), named("Rate", Some("Notes"), "Notes!$B$1"), named("Total", None, "#REF!")]
    );
    // Deleting a name in one scope keeps the others.
    s.execute("formulas.deleteName", json!({"name": "rate", "scope": "Notes"})).unwrap();
    assert_eq!(names(&s), [named("Rate", Some("Data (2)"), "'Data (2)'!$A$1"), named("Total", None, "#REF!")]);
    assert!(s.execute("formulas.deleteName", json!({"name": "Total", "scope": "Notes"})).is_err());
    s.execute("formulas.deleteName", json!({"name": "Total", "scope": "Workbook"})).unwrap();
    assert_eq!(names(&s).len(), 1);
}

#[test]
fn deleting_a_3d_span_end_sheet_keeps_the_rest() {
    let book = || {
        let mut s = s();
        for name in ["Sheet2", "Sheet3", "Results"] {
            s.execute("home.insertSheet", json!({"name": name})).unwrap();
        }
        for (sheet, n) in [("Sheet1", 3), ("Sheet2", 5), ("Sheet3", 7)] {
            s.execute("sheet.activate", json!({"sheet": sheet})).unwrap();
            s.execute("cell.set", json!({"cell": "A1", "input": n.to_string()})).unwrap();
        }
        s.execute("sheet.activate", json!({"sheet": "Results"})).unwrap();
        s.execute("cell.set", json!({"cell": "A1", "input": "=SUM(Sheet1:Sheet3!A1)"})).unwrap();
        s.execute("cell.set", json!({"cell": "B1", "input": "=Sheet1!A1"})).unwrap();
        s
    };
    let gone = Value::Error(gridcraft_core::CellError::Ref);
    for (deleted, total, direct) in [("Sheet1", 12.0, gone), ("Sheet3", 8.0, Value::Number(3.0)), ("Sheet2", 10.0, Value::Number(3.0))] {
        let mut s = book();
        s.execute("home.deleteSheet", json!({"sheet": deleted})).unwrap();
        s.execute("sheet.activate", json!({"sheet": "Results"})).unwrap();
        assert_eq!(v(&s, "A1"), Value::Number(total), "deleting {deleted}");
        assert_eq!(v(&s, "B1"), direct, "deleting {deleted}");
    }
}

#[test]
fn xlsx_roundtrip_through_engine() {
    let mut s = s();
    s.execute("range.setValues", json!({"range": "A1", "values": [["a", 1], ["b", 2]]})).unwrap();
    s.execute("cell.set", json!({"cell": "B3", "input": "=SUM(B1:B2)"})).unwrap();
    let r = s.execute("file.saveBytes", json!({"format": "xlsx"})).unwrap();
    let b64 = r["base64"].as_str().unwrap().to_string();
    s.execute("file.open", json!({"name": "x.xlsx", "base64": b64})).unwrap();
    assert_eq!(v(&s, "B3"), Value::Number(3.0));
}

fn ods_fixture() -> Vec<u8> {
    use std::io::{Cursor, Write};
    let mut zip = zip::ZipWriter::new(Cursor::new(Vec::new()));
    let options = zip::write::SimpleFileOptions::default().compression_method(zip::CompressionMethod::Stored);
    for (name, data) in [
        ("mimetype", "application/vnd.oasis.opendocument.spreadsheet"),
        (
            "META-INF/manifest.xml",
            r#"<manifest:manifest xmlns:manifest="urn:oasis:names:tc:opendocument:xmlns:manifest:1.0" manifest:version="1.3"><manifest:file-entry manifest:full-path="/" manifest:media-type="application/vnd.oasis.opendocument.spreadsheet"/><manifest:file-entry manifest:full-path="content.xml" manifest:media-type="text/xml"/></manifest:manifest>"#,
        ),
        (
            "content.xml",
            r#"<office:document-content xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:table="urn:oasis:names:tc:opendocument:xmlns:table:1.0" xmlns:text="urn:oasis:names:tc:opendocument:xmlns:text:1.0" xmlns:of="urn:oasis:names:tc:opendocument:xmlns:of:1.2" office:version="1.3"><office:body><office:spreadsheet><table:table table:name="Data"><table:table-row><table:table-cell office:value-type="float" office:value="42" table:formula="of:=SUM([.B1:.B2])"/><table:table-cell office:value-type="string"><text:p>Original data</text:p></table:table-cell></table:table-row></table:table></office:spreadsheet></office:body></office:document-content>"#,
        ),
    ] {
        zip.start_file(name, options).unwrap();
        zip.write_all(data.as_bytes()).unwrap();
    }
    zip.finish().unwrap().into_inner()
}

#[test]
fn ods_import_keeps_cached_values_and_reports_limits() {
    let bytes = ods_fixture();
    assert_eq!(gridcraft_xlsx::sniff(&bytes), gridcraft_xlsx::Format::Ods);
    for name in ["source.ods", "source.xlsx"] {
        let mut s = s();
        let r = s.execute("file.open", json!({"name": name, "base64": crate::io::base64_encode(&bytes)})).unwrap();
        assert!(!r["warnings"].as_array().unwrap().is_empty());
        assert!(s.take_ui_requests().iter().any(|r| matches!(r, crate::UiRequest::Message(_))));
        assert!(s.doc().unwrap().path.is_none());
        assert!(s.doc().unwrap().display_title().ends_with(".xlsx"));
        assert_eq!(v(&s, "A1"), Value::Number(42.0));
        assert_eq!(v(&s, "B1"), Value::from("Original data"));
        assert!(s.doc().unwrap().wb.active().unwrap().cell(CellRef::parse("A1").unwrap()).unwrap().formula.is_none());
        let saved = s.execute("file.saveBytes", json!({"format": "xlsx"})).unwrap();
        s.execute("file.open", json!({"name": "imported.xlsx", "base64": saved["base64"]})).unwrap();
        assert_eq!(v(&s, "A1"), Value::Number(42.0));
    }
}

#[test]
#[cfg(not(target_arch = "wasm32"))]
fn ods_import_never_reuses_source_as_save_target() {
    #[allow(clippy::disallowed_methods)] // native-only test: a unique temp dir name
    let nonce = std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH).unwrap().as_nanos();
    let dir = std::env::temp_dir().join(format!("gridcraft-ods-{}-{nonce}", std::process::id()));
    std::fs::create_dir(&dir).unwrap();
    let bytes = ods_fixture();
    for name in ["source.ods", "disguised.xlsx"] {
        let path = dir.join(name);
        std::fs::write(&path, &bytes).unwrap();
        let mut s = s();
        s.execute("file.open", json!({"path": path})).unwrap();
        s.take_ui_requests();
        s.execute("cell.set", json!({"cell": "A1", "input": "43"})).unwrap();
        s.execute("file.save", json!({})).unwrap();
        assert!(s.take_ui_requests().iter().any(|r| matches!(r, crate::UiRequest::Dialog(name, _) if name == "saveAs")));
        assert_eq!(std::fs::read(&path).unwrap(), bytes);
        assert!(s.execute("file.saveAs", json!({"path": dir.join("source.ods")})).is_err());
        assert!(s.execute("file.saveBytes", json!({"format": "ods"})).is_err());
        let output = dir.join("converted.xlsx");
        s.execute("file.saveAs", json!({"path": output})).unwrap();
        assert!(!s.doc().unwrap().is_dirty());
        assert_eq!(std::fs::read(&path).unwrap(), bytes);
        s.execute("file.open", json!({"name": "converted.xlsx", "base64": crate::io::base64_encode(&std::fs::read(output).unwrap())})).unwrap();
        assert_eq!(v(&s, "A1"), Value::Number(43.0));
    }
    std::fs::remove_dir_all(dir).unwrap();
}

#[test]
fn samples_build() {
    for (name, _) in crate::sample::SAMPLES {
        let wb = crate::sample::build(name).unwrap_or_else(|| panic!("sample {name}"));
        assert!(!wb.sheets[0].cells.is_empty());
    }
}

/// Original minimal BIFF12 records, built in source rather than a vendor workbook fixture.
fn xlsb_fixture() -> Vec<u8> {
    use std::io::{Cursor, Write};
    fn wide(s: &str) -> Vec<u8> {
        let units: Vec<_> = s.encode_utf16().collect();
        (units.len() as u32).to_le_bytes().into_iter().chain(units.into_iter().flat_map(u16::to_le_bytes)).collect()
    }
    fn record(out: &mut Vec<u8>, id: u16, payload: &[u8]) {
        if id < 128 {
            out.push(id as u8);
        } else {
            out.extend([(id as u8 & 127) | 128, (id >> 7) as u8]);
        }
        let mut size = payload.len();
        while size >= 128 {
            out.push((size as u8 & 127) | 128);
            size >>= 7;
        }
        out.push(size as u8);
        out.extend(payload);
    }
    let mut book = vec![];
    record(&mut book, 131, &[]); // BeginBook
    record(&mut book, 143, &[]); // BeginBundleShs
    let mut bundle = vec![0; 4]; // Visible
    bundle.extend(1u32.to_le_bytes());
    bundle.extend(wide("rId1"));
    bundle.extend(wide("Imported"));
    record(&mut book, 156, &bundle);
    record(&mut book, 144, &[]);
    record(&mut book, 132, &[]);
    let mut sheet = vec![];
    record(&mut sheet, 129, &[]); // BeginSheet
    record(&mut sheet, 145, &[]); // BeginSheetData
    record(&mut sheet, 0, &[0; 17]); // Row 0, no spans
    let mut numeric = vec![0; 8]; // A1, default style
    numeric.extend(42.0f64.to_le_bytes());
    numeric.extend([0; 2]); // Formula flags
    numeric.extend(3u32.to_le_bytes());
    numeric.extend([0x1e, 42, 0]); // PtgInt(42)
    numeric.extend(0u32.to_le_bytes());
    record(&mut sheet, 9, &numeric); // FmlaNum
    let mut text = 1u32.to_le_bytes().to_vec(); // B1
    text.extend(0u32.to_le_bytes());
    text.extend(wide("Original data"));
    record(&mut sheet, 6, &text);
    record(&mut sheet, 146, &[]);
    record(&mut sheet, 130, &[]);
    let mut zip = zip::ZipWriter::new(Cursor::new(Vec::new()));
    let types = br#"<Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types"><Override PartName="/xl/workbook.bin" ContentType="application/vnd.ms-excel.sheet.binary.macroEnabled.main"/><Override PartName="/xl/worksheets/sheet1.bin" ContentType="application/vnd.ms-excel.worksheet"/></Types>"#;
    let rels = br#"<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"><Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument" Target="xl/workbook.bin"/></Relationships>"#;
    let book_rels = br#"<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"><Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/worksheet" Target="worksheets/sheet1.bin"/></Relationships>"#;
    for (name, data) in [
        ("[Content_Types].xml", types.as_slice()),
        ("_rels/.rels", rels.as_slice()),
        ("xl/_rels/workbook.bin.rels", book_rels.as_slice()),
        ("xl/workbook.bin", book.as_slice()),
        ("xl/worksheets/sheet1.bin", sheet.as_slice()),
    ] {
        zip.start_file(name, zip::write::SimpleFileOptions::default()).unwrap();
        zip.write_all(data).unwrap();
    }
    zip.finish().unwrap().into_inner()
}

#[test]
fn replacing_a_spilling_formula_clears_its_spill() {
    let mut s = s();
    s.execute("cell.set", json!({"cell": "A1", "input": "=SEQUENCE(3)"})).unwrap();
    s.execute("cell.set", json!({"cell": "B1", "input": "=SUM(A1:A3)"})).unwrap();
    s.execute("cell.set", json!({"cell": "A1", "input": "2"})).unwrap();
    assert_eq!((v(&s, "A2"), v(&s, "A3"), v(&s, "B1")), (Value::Empty, Value::Empty, Value::Number(2.0)));
    s.execute("cell.set", json!({"cell": "A1", "input": "=SEQUENCE(3)"})).unwrap();
    s.execute("edit.clearContents", json!({"range": "A1"})).unwrap();
    assert_eq!((v(&s, "A2"), v(&s, "B1")), (Value::Empty, Value::Number(0.0)));
}

#[test]
fn range_ending_in_index_recalculates() {
    let mut s = s();
    s.execute("cell.set", json!({"cell": "B6", "input": "=SUM(C3:INDEX(B9:C11,2,2))"})).unwrap();
    s.execute("cell.set", json!({"cell": "C5", "input": "2"})).unwrap();
    assert_eq!(v(&s, "B6"), Value::Number(2.0));
}

#[test]
fn structural_edits_move_spills_with_their_formula() {
    let mut s = s();
    s.execute("cell.set", json!({"cell": "A5", "input": "=SEQUENCE(3)"})).unwrap();
    s.execute("home.deleteRows", json!({"rows": "1:1"})).unwrap();
    let col = |s: &Session| (4..=7).map(|r| v(s, &format!("A{r}"))).collect::<Vec<_>>();
    assert_eq!(col(&s), [Value::Number(1.0), Value::Number(2.0), Value::Number(3.0), Value::Empty]);
    s.execute("home.deleteRows", json!({"rows": "4:4"})).unwrap();
    assert_eq!(col(&s), [Value::Empty, Value::Empty, Value::Empty, Value::Empty]);
}

#[test]
fn clearing_a_distant_blocker_unblocks_the_spill() {
    let mut s = s();
    s.execute("cell.set", json!({"cell": "A1", "input": "=SEQUENCE(100)"})).unwrap();
    s.execute("cell.set", json!({"cell": "A90", "input": "x"})).unwrap();
    assert_eq!(v(&s, "A1"), Value::Error(gridcraft_core::CellError::Spill));
    s.execute("edit.clearContents", json!({"range": "A90"})).unwrap();
    assert_eq!((v(&s, "A1"), v(&s, "A100")), (Value::Number(1.0), Value::Number(100.0)));
}

#[test]
fn a_spill_that_goes_away_unblocks_another() {
    let mut s = s();
    s.execute("cell.set", json!({"cell": "F8", "input": "=SEQUENCE(5)"})).unwrap();
    s.execute("cell.set", json!({"cell": "E10", "input": "=SEQUENCE(1,3)"})).unwrap();
    assert_eq!(v(&s, "E10"), Value::Error(gridcraft_core::CellError::Spill));
    // Blocking F8's array frees F10 for E10's.
    s.execute("cell.set", json!({"cell": "F9", "input": "0"})).unwrap();
    assert_eq!(v(&s, "F8"), Value::Error(gridcraft_core::CellError::Spill));
    assert_eq!((v(&s, "E10"), v(&s, "G10")), (Value::Number(1.0), Value::Number(3.0)));
}

#[test]
fn an_array_reading_another_arrays_spill_is_updated() {
    // G5 is evaluated before D11 in the same pass, so it first reads D11's old spill.
    let mut s = s();
    s.execute("cell.set", json!({"cell": "A1", "input": "1"})).unwrap();
    s.execute("cell.set", json!({"cell": "D11", "input": "=SEQUENCE(1,3,A1)"})).unwrap();
    s.execute("cell.set", json!({"cell": "G5", "input": "=UNIQUE(VSTACK(F9:F12,A1))"})).unwrap();
    s.execute("cell.set", json!({"cell": "A1", "input": "10"})).unwrap();
    assert_eq!((v(&s, "G6"), v(&s, "G7")), (Value::Number(12.0), Value::Number(10.0)));
    s.execute("formulas.calculateNow", json!({})).unwrap();
    assert_eq!((v(&s, "G6"), v(&s, "G7")), (Value::Number(12.0), Value::Number(10.0)));
}

#[test]
fn indirect_reads_a_spill_laid_out_in_the_same_pass() {
    let mut s = s();
    s.execute("cell.set", json!({"cell": "F5", "input": "=SEQUENCE(2,2,7)"})).unwrap();
    s.execute("home.insertRows", json!({"rows": "3:3"})).unwrap();
    s.execute("cell.set", json!({"cell": "E5", "input": "=INDIRECT(\"F7\")"})).unwrap();
    assert_eq!(v(&s, "E5"), Value::Number(9.0));
    s.execute("formulas.calculateNow", json!({})).unwrap();
    assert_eq!(v(&s, "E5"), Value::Number(9.0));
}

#[test]
fn every_command_survives_empty_params() {
    let mut s = Session::new();
    s.execute("file.new", json!({"sample": "sales"})).unwrap();
    for spec in crate::command_specs() {
        if matches!(spec.id, "file.close" | "file.open" | "file.save" | "file.saveAs" | "file.exportCsv" | "file.exportHtml" | "insert.picture") {
            continue;
        }
        let _ = s.execute(spec.id, json!({}));
        let _ = s.execute(spec.id, json!([1, 2]));
        let _ = s.execute(spec.id, json!({"range": "ZZZ999999999", "cell": "", "sheet": 99}));
    }
}

fn reopen(s: &mut Session) {
    let r = s.execute("file.saveBytes", json!({"format": "xlsx"})).unwrap();
    let b64 = r["base64"].as_str().unwrap().to_string();
    s.execute("file.open", json!({"name": "x.xlsx", "base64": b64})).unwrap();
}

fn chart_data(s: &mut Session) {
    s.execute(
        "range.setValues",
        json!({"range": "A1", "values": [["", "Open", "High", "Low", "Close"], ["Mon", 10, 14, 9, 12], ["Tue", 12, 15, 11, 14], ["Wed", 14, 16, 10, 11], ["Thu", 11, 13, 8, 9], ["Fri", 9, 12, 7, 11], ["Sat", 11, 15, 10, 14]]}),
    )
    .unwrap();
}

#[test]
fn every_chart_kind_survives_xlsx() {
    use gridcraft_model::ChartKind;
    let kinds = [
        ("combo", ChartKind::Combo),
        ("stock", ChartKind::Stock),
        ("histogram", ChartKind::Histogram),
        ("boxWhisker", ChartKind::BoxWhisker),
        ("waterfall", ChartKind::Waterfall),
        ("funnel", ChartKind::Funnel),
        ("treemap", ChartKind::Treemap),
        ("sunburst", ChartKind::Sunburst),
        ("column", ChartKind::ColumnClustered),
        ("line", ChartKind::Line),
        ("scatter", ChartKind::Scatter),
    ];
    for (t, kind) in kinds {
        let mut s = s();
        chart_data(&mut s);
        s.execute("insert.chart", json!({"type": t, "range": "A1:E7", "title": "Week"})).unwrap();
        let before = s.doc().unwrap().wb.active().unwrap().charts[0].clone();
        assert_eq!(before.kind, kind);
        reopen(&mut s);
        assert!(s.doc().unwrap().wb.names.is_empty(), "{t}");
        let after = &s.doc().unwrap().wb.active().unwrap().charts[0];
        assert_eq!(after.kind, kind, "{t}");
        assert_eq!(after.title.as_deref(), Some("Week"), "{t}");
        assert_eq!(after.series.len(), before.series.len(), "{t}");
        for (a, b) in after.series.iter().zip(&before.series) {
            assert_eq!((&a.name, &a.values, &a.color), (&b.name, &b.values, &b.color), "{t}");
            // A histogram bins its values; it has no categories in the file.
            if kind != ChartKind::Histogram {
                assert_eq!(a.categories, b.categories, "{t}");
            }
        }
    }
}

#[test]
fn whole_sheet_selection_stays_within_the_data() {
    // On an empty sheet with everything selected these filled or scanned every cell of the
    // sheet, running out of memory or time.
    let mut s = s();
    s.execute("edit.selectAll", json!({})).unwrap();
    for cmd in ["edit.fillDown", "edit.fillRight", "edit.fillUp", "edit.fillLeft", "data.removeDuplicates"] {
        s.execute(cmd, json!({})).unwrap();
    }
    s.execute("range.setValues", json!({"range": "A1", "values": [[1, 2], [3, 4], [5, 6]]})).unwrap();
    s.execute("selection.set", json!({"range": "A1:XFD1048576"})).unwrap();
    s.execute("edit.fillUp", json!({})).unwrap();
    assert_eq!(v(&s, "A1"), Value::Number(5.0));
    assert!(s.execute("edit.fillDown", json!({"range": "A1:Z1000000"})).is_err(), "too large to fill");
    assert!(s.execute("edit.autoFill", json!({"source": "A1:XFD1048576", "target": "A1"})).is_err(), "too large to fill");
    s.execute("range.setValues", json!({"range": "D1", "values": [[1], [1], [2]]})).unwrap();
    let r = s.execute("data.removeDuplicates", json!({"range": "D:D", "header": false})).unwrap();
    assert_eq!((r["removed"].clone(), r["remaining"].clone()), (json!(1), json!(2)));
    assert!(s.execute("data.removeDuplicates", json!({"range": "A1:XFD1048576", "header": false})).is_ok());
}

#[test]
fn parity_counts() {
    let (done, total) = crate::catalog::parity();
    assert!(total > 250);
    assert!(done > 150, "parity {done}/{total}");
}

#[test]
fn switch_row_column_on_a_chart_read_from_a_file() {
    let mut s = s();
    s.execute(
        "range.setValues",
        json!({"range": "A1", "values": [["", "North", "South", "East", "West"], ["Mon", 10, 14, 9, 12], ["Tue", 12, 15, 11, 14], ["Wed", 14, 16, 10, 11], ["Thu", 11, 13, 8, 9], ["Fri", 9, 12, 7, 11], ["Sat", 11, 15, 10, 14]]}),
    )
    .unwrap();
    s.execute("insert.chart", json!({"type": "column", "range": "A1:E7"})).unwrap();
    let r = s.execute("file.saveBytes", json!({"format": "xlsx"})).unwrap();
    let b64 = r["base64"].as_str().unwrap().to_string();
    s.execute("file.open", json!({"name": "x.xlsx", "base64": b64})).unwrap();
    let chart = |s: &Session| s.doc().unwrap().wb.active().unwrap().charts[0].clone();
    assert_eq!((chart(&s).source, chart(&s).series.len()), (None, 4));
    s.execute("chart.switchRowColumn", json!({})).unwrap();
    let c = chart(&s);
    assert!(c.by_rows);
    assert_eq!(c.source.as_deref(), Some("Sheet1!A1:E7"));
    assert_eq!(c.series.len(), 6);
    assert_eq!(c.series[0].name.as_deref(), Some("Sheet1!$A$2"));
    assert_eq!(c.series[0].categories.as_deref(), Some("Sheet1!$B$1:$E$1"));
    assert_eq!(c.series[0].values, "Sheet1!$B$2:$E$2");
    s.execute("chart.switchRowColumn", json!({})).unwrap();
    assert_eq!(chart(&s).series.len(), 4);
}

#[test]
fn switch_row_column_with_whole_column_refs_is_bounded() {
    let mut s = s();
    s.execute("range.setValues", json!({"range": "A1", "values": [["", "North", "South"], ["Mon", 10, 14], ["Tue", 12, 15], ["Wed", 14, 16]]}))
        .unwrap();
    s.execute("insert.chart", json!({"type": "column", "range": "A1:C4"})).unwrap();
    // As read from a file: no source block, series over whole columns.
    let whole = |s: &mut Session| {
        let c = &mut std::sync::Arc::make_mut(&mut s.doc_mut().unwrap().wb).sheet_mut(0).unwrap().charts[0];
        c.source = None;
        c.by_rows = false;
        c.series.truncate(2);
        for (i, col) in ["B", "C"].iter().enumerate() {
            c.series[i].name = None;
            c.series[i].categories = Some("Sheet1!$A:$A".into());
            c.series[i].values = format!("Sheet1!${col}:${col}");
        }
    };
    whole(&mut s);
    s.execute("chart.switchRowColumn", json!({})).unwrap();
    let c = s.doc().unwrap().wb.active().unwrap().charts[0].clone();
    assert!(c.by_rows);
    // Clipped to the used rows, not a million series.
    assert_eq!(c.series.len(), 3);
    // A used range that is itself enormous is refused rather than charted.
    s.execute("cell.set", json!({"cell": "C1048576", "input": "1"})).unwrap();
    whole(&mut s);
    assert!(s.execute("chart.switchRowColumn", json!({})).is_err());
    assert_eq!(s.doc().unwrap().wb.active().unwrap().charts[0].series.len(), 2);
}

#[test]
fn ink_strokes_and_ink_to_shape() {
    let mut s = s();
    // A rough closed box.
    let pts: Vec<[f64; 2]> = vec![[100.0, 100.0], [200.0, 102.0], [201.0, 180.0], [99.0, 181.0], [101.0, 104.0]];
    s.execute("draw.stroke", json!({"points": pts})).unwrap();
    let sh = s.doc().unwrap().wb.active().unwrap().clone();
    assert_eq!(sh.shapes.len(), 1);
    assert_eq!(sh.shapes[0].kind, gridcraft_model::ShapeKind::Ink);
    let r = s.execute("draw.inkToShape", json!({})).unwrap();
    assert_eq!(r["kind"], "Rectangle");
    // An open stroke becomes a line.
    s.execute("draw.stroke", json!({"points": [[0.0, 0.0], [50.0, 10.0], [120.0, 30.0]]})).unwrap();
    assert_eq!(s.execute("draw.inkToShape", json!({})).unwrap()["kind"], "Line");
    assert!(s.execute("draw.stroke", json!({"points": [[1.0, 1.0]]})).is_err());
}

#[test]
fn xlsb_import_keeps_cached_values_and_reports_limits() {
    let bytes = xlsb_fixture();
    assert_eq!(gridcraft_xlsx::sniff(&bytes), gridcraft_xlsx::Format::Xlsb);
    for name in ["source.xlsb", "source.xlsx"] {
        let mut s = s();
        let r = s.execute("file.open", json!({"name": name, "base64": crate::io::base64_encode(&bytes)})).unwrap();
        assert!(!r["warnings"].as_array().unwrap().is_empty());
        assert!(s.take_ui_requests().iter().any(|r| matches!(r, crate::UiRequest::Message(_))));
        assert!(s.doc().unwrap().path.is_none());
        assert!(s.doc().unwrap().display_title().ends_with(".xlsx"));
        assert_eq!(v(&s, "A1"), Value::Number(42.0));
        assert_eq!(v(&s, "B1"), Value::from("Original data"));
        assert!(s.doc().unwrap().wb.active().unwrap().cell(CellRef::parse("A1").unwrap()).unwrap().formula.is_none());
        s.execute("cell.set", json!({"cell": "B1", "input": "Changed"})).unwrap();
        assert_eq!(v(&s, "A1"), Value::Number(42.0)); // Imported formula caches are constants.
        let saved = s.execute("file.saveBytes", json!({"format": "xlsx"})).unwrap();
        s.execute("file.open", json!({"name": "imported.xlsx", "base64": saved["base64"]})).unwrap();
        assert_eq!(v(&s, "A1"), Value::Number(42.0));
    }
}

#[test]
#[cfg(not(target_arch = "wasm32"))]
fn xlsb_import_never_reuses_source_as_save_target() {
    #[allow(clippy::disallowed_methods)] // native-only test: a unique temp dir name
    let nonce = std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH).unwrap().as_nanos();
    let dir = std::env::temp_dir().join(format!("gridcraft-xlsb-{}-{nonce}", std::process::id()));
    std::fs::create_dir(&dir).unwrap();
    let bytes = xlsb_fixture();
    for name in ["source.xlsb", "disguised.xlsx"] {
        let path = dir.join(name);
        std::fs::write(&path, &bytes).unwrap();
        let mut s = s();
        s.execute("file.open", json!({"path": path})).unwrap();
        s.take_ui_requests();
        s.execute("cell.set", json!({"cell": "A1", "input": "43"})).unwrap();
        s.execute("file.save", json!({})).unwrap();
        assert!(s.take_ui_requests().iter().any(|r| matches!(r, crate::UiRequest::Dialog(name, _) if name == "saveAs")));
        assert_eq!(std::fs::read(&path).unwrap(), bytes);
        assert!(s.execute("file.saveAs", json!({"path": dir.join("source.xlsb")})).is_err());
        assert!(s.execute("file.saveBytes", json!({"format": "xlsb"})).is_err());
        let output = dir.join("converted.xlsx");
        s.execute("file.saveAs", json!({"path": output})).unwrap();
        assert!(!s.doc().unwrap().is_dirty());
        assert_eq!(std::fs::read(&path).unwrap(), bytes);
        s.execute("file.open", json!({"name": "converted.xlsx", "base64": crate::io::base64_encode(&std::fs::read(output).unwrap())})).unwrap();
        assert_eq!(v(&s, "A1"), Value::Number(43.0));
    }
    std::fs::remove_dir_all(dir).unwrap();
}

#[test]
fn malformed_xlsb_keeps_the_current_workbook() {
    let mut s = s();
    s.execute("cell.set", json!({"cell": "A1", "input": "Keep me"})).unwrap();
    assert!(s.execute("file.open", json!({"name": "bad.xlsb", "base64": crate::io::base64_encode(b"not a workbook")})).is_err());
    assert_eq!(s.documents().len(), 1);
    assert_eq!(v(&s, "A1"), Value::from("Keep me"));
    assert!(s.doc().unwrap().is_dirty());
}

/// A 2×2 PNG, so objects can be injected into a workbook in tests.
fn tiny_png() -> Vec<u8> {
    let img = image::RgbaImage::from_raw(2, 2, vec![255, 0, 0, 255, 0, 255, 0, 128, 0, 0, 255, 255, 0, 0, 0, 0]).unwrap();
    let mut png = Vec::new();
    image::DynamicImage::ImageRgba8(img).write_to(&mut std::io::Cursor::new(&mut png), image::ImageFormat::Png).unwrap();
    png
}

fn add_image(s: &mut Session, cell: &str, mode: gridcraft_model::AnchorMode) -> u32 {
    let d = s.doc_mut().unwrap();
    let wb = std::sync::Arc::make_mut(&mut d.wb);
    let id = wb.next_object_id();
    wb.sheet_mut(0).unwrap().images.push(gridcraft_model::Image {
        id,
        anchor: gridcraft_model::Anchor { cell: CellRef::parse(cell).unwrap(), dx: 0.0, dy: 0.0, width: 40.0, height: 40.0, mode },
        data: tiny_png(),
        mime: "image/png".into(),
        alt: String::new(),
    });
    id
}

fn image_cell(s: &Session, id: u32) -> Option<CellRef> {
    s.doc().unwrap().wb.active().unwrap().images.iter().find(|i| i.id == id).map(|i| i.anchor.cell)
}

/// Issue #5: images anchored in cells follow their row when the sheet is sorted.
#[test]
fn sort_moves_anchored_images_with_their_rows() {
    use gridcraft_model::AnchorMode;
    let mut s = s();
    s.execute("range.setValues", json!({"range": "A1", "values": [["Name", "Score"], ["b", 2], ["c", 3], ["a", 1]]})).unwrap();
    // One picture per data row, in its own row.
    let ib = add_image(&mut s, "A2", AnchorMode::MoveAndSize);
    let ic = add_image(&mut s, "A3", AnchorMode::MoveAndSize);
    let ia = add_image(&mut s, "A4", AnchorMode::MoveAndSize);
    s.execute("selection.set", json!({"range": "A1:B4"})).unwrap();
    s.execute("data.sortAscending", json!({"header": true, "column": "A"})).unwrap();
    // Ascending by name: b, c, a → a, b, c. Each picture lands in its row's new home.
    assert_eq!(image_cell(&s, ib), Some(CellRef::parse("A3").unwrap()));
    assert_eq!(image_cell(&s, ic), Some(CellRef::parse("A4").unwrap()));
    assert_eq!(image_cell(&s, ia), Some(CellRef::parse("A2").unwrap()));
}

/// An `absolute`-pinned object stays exactly where it was drawn across a sort and a row delete.
#[test]
fn absolute_objects_ignore_sort_and_structural_edits() {
    use gridcraft_model::AnchorMode;
    let mut s = s();
    s.execute("range.setValues", json!({"range": "A1", "values": [["Name", "Score"], ["b", 2], ["c", 3], ["a", 1]]})).unwrap();
    let pinned = add_image(&mut s, "A3", AnchorMode::Absolute);
    s.execute("selection.set", json!({"range": "A1:B4"})).unwrap();
    s.execute("data.sortAscending", json!({"header": true, "column": "A"})).unwrap();
    assert_eq!(image_cell(&s, pinned), Some(CellRef::parse("A3").unwrap()));
    s.execute("home.deleteRows", json!({"rows": "2:2"})).unwrap();
    assert_eq!(image_cell(&s, pinned), Some(CellRef::parse("A3").unwrap()));
}

/// A "move but don't size" object follows its row across a sort but keeps its size.
#[test]
fn move_only_objects_follow_but_do_not_resize() {
    use gridcraft_model::AnchorMode;
    let mut s = s();
    s.execute("range.setValues", json!({"range": "A1", "values": [["Name", "N"], ["b", 2], ["a", 1]]})).unwrap();
    let id = add_image(&mut s, "A2", AnchorMode::MoveOnly);
    s.execute("selection.set", json!({"range": "A1:B3"})).unwrap();
    s.execute("data.sortAscending", json!({"column": "A"})).unwrap();
    // "a" moved to row 2 and "b" to row 3, so the image follows from A2 to A3.
    assert_eq!(image_cell(&s, id), Some(CellRef::parse("A3").unwrap()));
    let a = s.doc().unwrap().wb.active().unwrap().images.iter().find(|i| i.id == id).unwrap().anchor;
    assert_eq!((a.width, a.height), (40.0, 40.0));
}

/// `object.setAnchorMode` changes how an object follows its cells.
#[test]
fn set_anchor_mode_changes_following() {
    use gridcraft_model::AnchorMode;
    let mut s = s();
    s.execute("range.setValues", json!({"range": "A1", "values": [["Name", "N"], ["b", 2], ["a", 1]]})).unwrap();
    let id = add_image(&mut s, "A2", AnchorMode::MoveAndSize);
    let r = s.execute("object.setAnchorMode", json!({"kind": "image", "id": id, "mode": "dontMoveOrSizeWithCells"})).unwrap();
    assert_eq!(r["mode"], "absolute");
    s.execute("selection.set", json!({"range": "A1:B3"})).unwrap();
    s.execute("data.sortAscending", json!({"column": "A"})).unwrap();
    // Pinned absolute: it stays put even though its row moved.
    assert_eq!(image_cell(&s, id), Some(CellRef::parse("A2").unwrap()));
    // A bad mode is rejected, not silently ignored.
    assert!(s.execute("object.setAnchorMode", json!({"kind": "image", "id": id, "mode": "sideways"})).is_err());
}

/// A sort moves only objects anchored inside the sorted block on both axes: a picture beside
/// the block (same rows, other columns) stays where it is.
#[test]
fn sort_leaves_objects_outside_the_block_alone() {
    use gridcraft_model::AnchorMode;
    let mut s = s();
    s.execute("range.setValues", json!({"range": "A1", "values": [["Name", "Score"], ["b", 2], ["c", 3], ["a", 1]]})).unwrap();
    let beside = add_image(&mut s, "Z3", AnchorMode::MoveAndSize);
    let inside = add_image(&mut s, "B3", AnchorMode::MoveAndSize);
    s.execute("selection.set", json!({"range": "A1:B4"})).unwrap();
    s.execute("data.sortAscending", json!({"header": true, "column": "A"})).unwrap();
    assert_eq!(image_cell(&s, beside), Some(CellRef::parse("Z3").unwrap()));
    // "c" moved from row 3 to row 4, taking the picture in B3 with it.
    assert_eq!(image_cell(&s, inside), Some(CellRef::parse("B4").unwrap()));
}

/// Inserted pictures default to Excel's "Move but don't size with cells".
#[test]
fn inserted_pictures_move_but_do_not_size() {
    let mut s = s();
    let b64 = crate::io::base64_encode(&tiny_png());
    let id = s.execute("insert.picture", json!({"base64": b64, "at": "C3"})).unwrap()["image"].as_u64().unwrap() as u32;
    let mode = |s: &Session| s.doc().unwrap().wb.active().unwrap().images.iter().find(|i| i.id == id).unwrap().anchor.mode;
    assert_eq!(mode(&s), gridcraft_model::AnchorMode::MoveOnly);
    let b64 = crate::io::base64_encode(&tiny_png());
    let id2 = s.execute("insert.picture", json!({"base64": b64, "mode": "absolute"})).unwrap()["image"].as_u64().unwrap() as u32;
    let m2 = s.doc().unwrap().wb.active().unwrap().images.iter().find(|i| i.id == id2).unwrap().anchor.mode;
    assert_eq!(m2, gridcraft_model::AnchorMode::Absolute);
}

/// `object.setAnchorMode` needs a real object kind.
#[test]
fn set_anchor_mode_rejects_unknown_kind() {
    use gridcraft_model::AnchorMode;
    let mut s = s();
    let id = add_image(&mut s, "A2", AnchorMode::MoveAndSize);
    for kind in [json!(""), json!("widget"), serde_json::Value::Null] {
        assert!(s.execute("object.setAnchorMode", json!({"kind": kind, "id": id, "mode": "absolute"})).is_err());
    }
    let mode = |s: &Session| s.doc().unwrap().wb.active().unwrap().images[0].anchor.mode;
    assert_eq!(mode(&s), AnchorMode::MoveAndSize);
    s.execute("object.setAnchorMode", json!({"kind": "image", "id": id, "mode": "moveOnly"})).unwrap();
    assert_eq!(mode(&s), AnchorMode::MoveOnly);
}

fn original_cell_picture() -> Vec<u8> {
    let image = image::RgbaImage::from_fn(4, 2, |x, _| if x < 2 { image::Rgba([240, 60, 40, 255]) } else { image::Rgba([20, 100, 240, 128]) });
    let mut png = Vec::new();
    image::DynamicImage::ImageRgba8(image).write_to(&mut std::io::Cursor::new(&mut png), image::ImageFormat::Png).unwrap();
    png
}

fn insert_cell_picture(s: &mut Session, at: &str, alt: &str) {
    s.execute("insert.picture", json!({"placement": "cell", "at": at, "base64": crate::io::base64_encode(&original_cell_picture()), "alt": alt}))
        .unwrap();
}

fn cell_picture(s: &Session, at: &str) -> Option<std::sync::Arc<gridcraft_model::CellPicture>> {
    s.doc().unwrap().wb.active().unwrap().cell_pictures.get(&CellRef::parse(at).unwrap()).cloned()
}

#[test]
fn cell_picture_insert_validates_content_preserves_style_and_replaces_with_undo() {
    let mut s = s();
    s.execute("cell.set", json!({"cell": "B2", "input": "old"})).unwrap();
    s.execute("home.bold", json!({"range": "B2"})).unwrap();
    for bytes in [b"not an image".as_slice(), b"GIF89a", &original_cell_picture()[..24]] {
        assert!(s.execute("insert.picture", json!({"placement": "cell", "at": "B2", "base64": crate::io::base64_encode(bytes)})).is_err());
        assert_eq!(v(&s, "B2"), Value::from("old"));
    }
    insert_cell_picture(&mut s, "B2", "Original picture");
    assert_eq!(v(&s, "B2"), Value::Error(gridcraft_core::CellError::Value));
    let state = s.execute("cell.get", json!({"cell": "B2"})).unwrap();
    assert_eq!(state["type"], "picture");
    assert_eq!(state["text"], "#VALUE!");
    assert_eq!(state["input"], "");
    assert_eq!(state["picture"]["alt"], "Original picture");
    assert!(state["picture"].get("data").is_none());
    assert_eq!(state["style"]["font"]["bold"], true);
    assert!(s.doc().unwrap().wb.active().unwrap().images.is_empty());
    s.execute("cell.set", json!({"cell": "B2", "input": "=2+3"})).unwrap();
    assert!(cell_picture(&s, "B2").is_none());
    assert_eq!(v(&s, "B2"), Value::Number(5.0));
    s.execute("edit.undo", json!({})).unwrap();
    assert_eq!(cell_picture(&s, "B2").unwrap().alt, "Original picture");
    s.execute("range.setValues", json!({"range": "B2", "values": [[7]]})).unwrap();
    assert!(cell_picture(&s, "B2").is_none());
    let mut jpeg = Vec::new();
    image::DynamicImage::ImageRgb8(image::RgbImage::from_pixel(2, 1, image::Rgb([60, 80, 100])))
        .write_to(&mut std::io::Cursor::new(&mut jpeg), image::ImageFormat::Jpeg)
        .unwrap();
    s.execute("insert.picture", json!({"placement": "cell", "at": "D2", "base64": crate::io::base64_encode(&jpeg), "mime": "wrong/client-mime"}))
        .unwrap();
    assert_eq!(cell_picture(&s, "D2").unwrap().mime, "image/jpeg");
}

#[test]
fn cell_picture_clipboard_clear_and_structural_edits_keep_complete_payload() {
    let mut s = s();
    insert_cell_picture(&mut s, "B2", "moves with the row");
    let original = cell_picture(&s, "B2").unwrap();
    s.execute("edit.copy", json!({"range": "B2"})).unwrap();
    s.execute("edit.pasteSpecial", json!({"what": "values", "at": "D2"})).unwrap();
    assert!(std::sync::Arc::ptr_eq(&original, &cell_picture(&s, "D2").unwrap()));
    s.execute("home.bold", json!({"range": "C1"})).unwrap();
    s.execute("edit.copy", json!({"range": "C1"})).unwrap();
    s.execute("edit.pasteSpecial", json!({"what": "formats", "at": "D2"})).unwrap();
    assert_eq!(cell_picture(&s, "D2").unwrap().alt, original.alt);
    s.execute("edit.clearFormats", json!({"range": "D2"})).unwrap();
    assert!(cell_picture(&s, "D2").is_some());
    s.execute("edit.clearContents", json!({"range": "D2"})).unwrap();
    assert!(cell_picture(&s, "D2").is_none());
    s.execute("cell.set", json!({"cell": "C1", "input": "3"})).unwrap();
    s.execute("edit.copy", json!({"range": "B2"})).unwrap();
    s.execute("edit.pasteSpecial", json!({"what": "values", "at": "C1", "operation": "add"})).unwrap();
    assert!(cell_picture(&s, "C1").is_none());
    assert_eq!(v(&s, "C1"), Value::Error(gridcraft_core::CellError::Value));
    s.execute("home.insertRows", json!({"rows": "2:2"})).unwrap();
    s.execute("home.insertColumns", json!({"cols": "B:B"})).unwrap();
    assert_eq!(cell_picture(&s, "C3").unwrap().alt, original.alt);
    s.execute("edit.cut", json!({"range": "C3"})).unwrap();
    s.execute("home.insertSheet", json!({"name": "Destination"})).unwrap();
    s.execute("edit.paste", json!({"at": "E4"})).unwrap();
    assert_eq!(cell_picture(&s, "E4").unwrap().alt, original.alt);
    assert!(s.doc().unwrap().wb.sheet(0).unwrap().cell(CellRef::parse("C3").unwrap()).is_none());
    s.execute("home.deleteColumns", json!({"cols": "E:E"})).unwrap();
    assert!(cell_picture(&s, "E4").is_none());
    s.execute("edit.undo", json!({})).unwrap();
    assert_eq!(cell_picture(&s, "E4").unwrap().data, original.data);
}

#[test]
fn cell_picture_follows_sort_filter_and_blocks_formula_spills() {
    let mut s = s();
    s.execute("range.setValues", json!({"range": "A1", "values": [["Rank", "Picture"], [2], [1]]})).unwrap();
    insert_cell_picture(&mut s, "B2", "rank two");
    insert_cell_picture(&mut s, "B3", "rank one");
    s.execute("data.sort", json!({"range": "A1:B3", "header": true, "keys": [{"column": "A", "order": "asc"}]})).unwrap();
    assert_eq!(cell_picture(&s, "B2").unwrap().alt, "rank one");
    assert_eq!(cell_picture(&s, "B3").unwrap().alt, "rank two");
    s.execute("selection.set", json!({"range": "A1:B3"})).unwrap();
    s.execute("data.filter", json!({})).unwrap();
    s.execute("data.filterBy", json!({"column": "A", "values": ["1"]})).unwrap();
    assert!(s.doc().unwrap().wb.active().unwrap().is_row_hidden(2));
    assert!(cell_picture(&s, "B3").is_some());
    insert_cell_picture(&mut s, "D2", "spill obstruction");
    s.execute("cell.set", json!({"cell": "D1", "input": "=SEQUENCE(2)"})).unwrap();
    assert_eq!(v(&s, "D1"), Value::Error(gridcraft_core::CellError::Spill));
    s.execute("edit.clearContents", json!({"range": "D2"})).unwrap();
    assert_eq!(v(&s, "D1"), Value::Number(1.0));
    assert_eq!(v(&s, "D2"), Value::Number(2.0));
}

#[test]
fn cell_picture_json_save_retains_content_and_pdf_draws_without_error_text() {
    let mut s = s();
    insert_cell_picture(&mut s, "B2", "original pixels");
    let saved = s.execute("file.saveBytes", json!({"format": "json"})).unwrap();
    s.execute("file.open", json!({"name": "pictures.json", "base64": saved["base64"]})).unwrap();
    assert_eq!(cell_picture(&s, "B2").unwrap().data, original_cell_picture());
    let pdf = s.execute("file.exportPdf", json!({"range": "A1:C3"})).unwrap();
    let data = crate::io::base64_decode(pdf["base64"].as_str().unwrap()).unwrap();
    let pdf_text = String::from_utf8_lossy(&data);
    assert!(pdf_text.contains("/Subtype /Image"));
    assert!(!pdf_text.contains("(#VALUE!) Tj"));
    s.execute("home.hideRows", json!({"rows": "2:2"})).unwrap();
    let pdf = s.execute("file.exportPdf", json!({"range": "A1:C3"})).unwrap();
    let data = crate::io::base64_decode(pdf["base64"].as_str().unwrap()).unwrap();
    assert!(!String::from_utf8_lossy(&data).contains("/Subtype /Image"));
}

#[test]
fn cell_picture_side_map_follows_fill_shift_merge_and_undo() {
    let mut s = s();
    insert_cell_picture(&mut s, "B2", "shared pixels");
    let original = cell_picture(&s, "B2").unwrap();
    s.execute("edit.fillDown", json!({"range": "B2:B4"})).unwrap();
    for at in ["B2", "B3", "B4"] {
        assert!(std::sync::Arc::ptr_eq(&original, &cell_picture(&s, at).unwrap()));
    }
    s.execute("edit.autoFill", json!({"source": "A2", "target": "A2:B2", "mode": "formats"})).unwrap();
    assert!(cell_picture(&s, "B2").is_some());
    s.execute("edit.autoFill", json!({"source": "A3", "target": "A3:B3", "mode": "copy"})).unwrap();
    assert!(cell_picture(&s, "B3").is_none());
    s.execute("home.insertCells", json!({"range": "B2", "shift": "down"})).unwrap();
    assert!(cell_picture(&s, "B2").is_none());
    assert!(cell_picture(&s, "B3").is_some());
    assert!(cell_picture(&s, "B5").is_some());
    s.execute("home.deleteCells", json!({"range": "B3", "shift": "up"})).unwrap();
    assert!(cell_picture(&s, "B3").is_none());
    assert!(cell_picture(&s, "B4").is_some());
    s.execute("home.mergeCells", json!({"range": "A4:B4"})).unwrap();
    assert!(cell_picture(&s, "B4").is_none());
    s.execute("edit.undo", json!({})).unwrap();
    assert!(cell_picture(&s, "B4").is_some());
    s.execute("edit.clearAll", json!({"range": "A1:C5"})).unwrap();
    assert!(s.doc().unwrap().wb.active().unwrap().cell_pictures.is_empty());
    insert_cell_picture(&mut s, "XFD1048576", "grid edge");
    assert!(s.execute("home.insertRows", json!({"rows": "1048576:1048576"})).is_err());
    assert_eq!(cell_picture(&s, "XFD1048576").unwrap().alt, "grid edge");
}

#[test]
fn cell_picture_cut_uses_live_source_after_edit() {
    for clear in [false, true] {
        let mut s = s();
        insert_cell_picture(&mut s, "B2", "original");
        s.execute("edit.cut", json!({"range": "B2"})).unwrap();
        if clear {
            s.execute("edit.clearContents", json!({"range": "B2"})).unwrap();
        } else {
            insert_cell_picture(&mut s, "B2", "replacement");
        }
        s.execute("edit.paste", json!({"at": "D2"})).unwrap();
        assert!(cell_picture(&s, "B2").is_none());
        if clear {
            assert!(cell_picture(&s, "D2").is_none());
            assert_eq!(v(&s, "D2"), Value::Empty);
        } else {
            assert_eq!(cell_picture(&s, "D2").unwrap().alt, "replacement");
            assert_eq!(v(&s, "D2"), Value::Error(gridcraft_core::CellError::Value));
        }
    }
}

fn ymd(y: i64, m: i64, d: i64) -> Value {
    Value::Number(gridcraft_core::date::serial_from_ymd(gridcraft_core::DateSystem::D1900, y, m, d).unwrap())
}

fn series_date(seed: &str, range: &str, unit: &str) -> Session {
    let mut s = s();
    s.execute("cell.set", json!({"cell": "A1", "input": seed})).unwrap();
    s.execute("edit.fillSeries", json!({"range": range, "direction": "columns", "type": "date", "dateUnit": unit})).unwrap();
    s
}

#[test]
fn fill_series_month_clamps_to_month_end() {
    let s = series_date("2026-01-31", "A1:A4", "month");
    assert_eq!(v(&s, "A1"), ymd(2026, 1, 31));
    assert_eq!(v(&s, "A2"), ymd(2026, 2, 28));
    assert_eq!(v(&s, "A3"), ymd(2026, 3, 31));
    assert_eq!(v(&s, "A4"), ymd(2026, 4, 30));
    // Mid-month seeds are untouched.
    let s = series_date("2026-01-15", "A1:A4", "month");
    assert_eq!(v(&s, "A4"), ymd(2026, 4, 15));
}

#[test]
fn fill_series_month_leap_year() {
    let s = series_date("2028-01-31", "A1:A3", "month");
    assert_eq!(v(&s, "A2"), ymd(2028, 2, 29));
    assert_eq!(v(&s, "A3"), ymd(2028, 3, 31));
    let s = series_date("1996-01-31", "A1:A3", "month");
    assert_eq!(v(&s, "A2"), ymd(1996, 2, 29));
}

#[test]
fn fill_series_year_clamps_leap_day() {
    let s = series_date("2028-02-29", "A1:A5", "year");
    assert_eq!(v(&s, "A2"), ymd(2029, 2, 28));
    assert_eq!(v(&s, "A5"), ymd(2032, 2, 29));
}

#[test]
fn autofill_month_pattern_clamps_to_month_end() {
    let mut s = s();
    s.execute("range.setValues", json!({"range": "A1", "values": [["2026-01-31"], ["2026-03-31"]]})).unwrap();
    s.execute("edit.autoFill", json!({"source": "A1:A2", "target": "A1:A6"})).unwrap();
    assert_eq!(v(&s, "A3"), ymd(2026, 5, 31));
    assert_eq!(v(&s, "A4"), ymd(2026, 7, 31));
    assert_eq!(v(&s, "A5"), ymd(2026, 9, 30));
    assert_eq!(v(&s, "A6"), ymd(2026, 11, 30));
}

#[test]
fn notes_comments_and_links_survive_a_json_save() {
    let mut s = s();
    s.execute("cell.set", json!({"cell": "A1", "input": "x"})).unwrap();
    s.execute("review.newNote", json!({"cell": "A1", "text": "note", "author": "Example"})).unwrap();
    s.execute("review.newComment", json!({"cell": "B2", "text": "comment", "author": "Example"})).unwrap();
    s.execute("insert.link", json!({"cell": "C3", "target": "Sheet1!A1", "tooltip": "jump"})).unwrap();
    let wb = &s.doc().unwrap().wb;
    let bytes = crate::io::save_bytes(wb, "book.json").unwrap();
    let (back, _) = crate::io::open_bytes("book.json", &bytes).unwrap();
    let (before, after) = (wb.active().unwrap(), back.active().unwrap());
    assert_eq!((before.comments.len(), before.hyperlinks.len()), (2, 1));
    assert_eq!(after.comments, before.comments);
    assert_eq!(after.hyperlinks, before.hyperlinks);
    assert_eq!(after.cells, before.cells);
}