CI: one test binary per crate, nextest, line tables only (#2372)

* CI: dev builds keep line tables only

* CI: one integration-test binary per crate

* CI: xtask runs tests with nextest, doctests apart, --keep-going on clippy and wasm

cargo xtask test runs the workspace tests (--lib --bins --tests) with cargo-nextest when it is installed, else cargo test, then the doctests. cargo xtask ci uses the same two steps.

* CI: docs name cargo xtask test

* CI: agent guides name the moved fuzz test

* CI: tests added on main join their crate's test binary

AGENTS.md

@@ -26,7 +26,7 @@ People trust GridCraft with their numbers; a crash loses their work. **This outr
 - **Input-derived numbers are hostile** (files, formulas, commands, MCP/control params): `get()` instead of indexing, checked/saturating arithmetic, cap input-sized allocations (huge ranges, `REPT`, `SEQUENCE`, whole-column references).
 - **Bound recursion** (formula nesting, dependency chains, names referring to names).
 - **Last-resort guard:** `Session::execute` catches escaped panics and restores the workbook. It's a safety net, not a licence.
-- **Prove it:** every crash fix lands with a regression test (`tests::every_command_survives_empty_params` fuzzes every command; `crates/engine/tests/command_sequence_fuzz.rs` fuzzes random command sequences against undo/redo, XLSX round-trip and full-recalc invariants; soak it with `GRIDCRAFT_FUZZ_SEEDS`/`GRIDCRAFT_FUZZ_STEPS`, replay with `GRIDCRAFT_FUZZ_SEED`).
+- **Prove it:** every crash fix lands with a regression test (`tests::every_command_survives_empty_params` fuzzes every command; `crates/engine/tests/it/command_sequence_fuzz.rs` fuzzes random command sequences against undo/redo, XLSX round-trip and full-recalc invariants; soak it with `GRIDCRAFT_FUZZ_SEEDS`/`GRIDCRAFT_FUZZ_STEPS`, replay with `GRIDCRAFT_FUZZ_SEED`).
 - Crates carry `#![deny(clippy::unwrap_used, clippy::expect_used, clippy::panic, clippy::unimplemented, clippy::todo, clippy::unreachable)]`.
 
 ## Non-negotiables

CLAUDE.md

@@ -26,7 +26,7 @@ People trust GridCraft with their numbers; a crash loses their work. **This outr
 - **Input-derived numbers are hostile** (files, formulas, commands, MCP/control params): `get()` instead of indexing, checked/saturating arithmetic, cap input-sized allocations (huge ranges, `REPT`, `SEQUENCE`, whole-column references).
 - **Bound recursion** (formula nesting, dependency chains, names referring to names).
 - **Last-resort guard:** `Session::execute` catches escaped panics and restores the workbook. It's a safety net, not a licence.
-- **Prove it:** every crash fix lands with a regression test (`tests::every_command_survives_empty_params` fuzzes every command; `crates/engine/tests/command_sequence_fuzz.rs` fuzzes random command sequences against undo/redo, XLSX round-trip and full-recalc invariants; soak it with `GRIDCRAFT_FUZZ_SEEDS`/`GRIDCRAFT_FUZZ_STEPS`, replay with `GRIDCRAFT_FUZZ_SEED`).
+- **Prove it:** every crash fix lands with a regression test (`tests::every_command_survives_empty_params` fuzzes every command; `crates/engine/tests/it/command_sequence_fuzz.rs` fuzzes random command sequences against undo/redo, XLSX round-trip and full-recalc invariants; soak it with `GRIDCRAFT_FUZZ_SEEDS`/`GRIDCRAFT_FUZZ_STEPS`, replay with `GRIDCRAFT_FUZZ_SEED`).
 - Crates carry `#![deny(clippy::unwrap_used, clippy::expect_used, clippy::panic, clippy::unimplemented, clippy::todo, clippy::unreachable)]`.
 
 ## Non-negotiables

Cargo.toml

@@ -68,9 +68,11 @@ type_complexity = "allow"
 
 [profile.dev.package."*"]
 opt-level = 2
+debug = false
 
 [profile.dev]
 opt-level = 1
+debug = "line-tables-only"
 
 [profile.release]
 opt-level = 3

apps/gridcraft-cli/tests/it/cli.rs

@@ -1,5 +1,3 @@
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
-
 use std::io::Write;
 use std::path::PathBuf;
 use std::process::{Command, Output, Stdio};

apps/gridcraft-cli/tests/it/main.rs

@@ -0,0 +1,5 @@
+//! The crate's integration tests, one module per file, built as one test binary.
+
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod cli;
+mod text_to_columns_quotes;

crates/engine/tests/it/command_sequence_fuzz.rs

@@ -23,7 +23,7 @@
 //!
 //! Knobs (environment variables):
 //! - `GRIDCRAFT_FUZZ_SEEDS` (default 6) and `GRIDCRAFT_FUZZ_STEPS` (default 40): the budget. Soak with
-//!   `GRIDCRAFT_FUZZ_SEEDS=200 GRIDCRAFT_FUZZ_STEPS=200 cargo test --release -p gridcraft-engine --test command_sequence_fuzz`.
+//!   `GRIDCRAFT_FUZZ_SEEDS=200 GRIDCRAFT_FUZZ_STEPS=200 cargo test --release -p gridcraft-engine --test it command_sequence_fuzz::`.
 //! - `GRIDCRAFT_FUZZ_SEED=17`: replay that one seed (the failure message prints the command line).
 //! - `GRIDCRAFT_FUZZ_SHRINK=1`: on failure, shrink the sequence to a minimal list of commands that
 //!   still fails the same way, printed as `execute` calls ready for a regression test.
@@ -138,7 +138,7 @@ fn report(seed: u64, steps: usize, sample: &str, sequence: &[Step], f: &Failure)
         None => format!("end-of-run checks after {} steps", sequence.len()),
     };
     let mut out = format!(
-        "command-sequence fuzz failure: seed {seed} (sample `{sample}`), {at}\n  invariant [{}]: {}\n  replay: GRIDCRAFT_FUZZ_SEED={seed} GRIDCRAFT_FUZZ_STEPS={steps} cargo test -p gridcraft-engine --test command_sequence_fuzz\n",
+        "command-sequence fuzz failure: seed {seed} (sample `{sample}`), {at}\n  invariant [{}]: {}\n  replay: GRIDCRAFT_FUZZ_SEED={seed} GRIDCRAFT_FUZZ_STEPS={steps} cargo test -p gridcraft-engine --test it command_sequence_fuzz::\n",
         f.kind, f.what
     );
     let end = (f.step + 1).min(sequence.len());

crates/engine/tests/it/main.rs

@@ -0,0 +1,29 @@
+//! The crate's integration tests, one module per file, built as one test binary.
+
+mod autofit_filter_buttons;
+mod cf_formula_validate;
+mod chart_workbook_names;
+mod command_sequence_fuzz;
+mod cross_sheet_cut;
+mod csv_export_budget;
+mod custom_filter_blanks;
+mod custom_view_freeze;
+mod dynamicmetadata;
+mod extreme_selection_moves;
+mod format_as_table_restyle;
+mod hidden_sheet_navigation;
+mod ink_roundtrip;
+mod line_count_overflow;
+mod long_operator_chains;
+mod offset_overflow;
+mod percent_entry;
+mod pivot_unknown_func;
+mod pivotchart_link;
+mod range_fill_formats;
+mod row_autofit;
+mod sheet_name_quoting;
+mod sparse_clear_invalidation;
+mod stored_list_shape;
+mod table_resize_overlap;
+mod table_total_row_last_row;
+mod wrap_row_height;

crates/formula/tests/it/main.rs

@@ -0,0 +1,4 @@
+//! The crate's integration tests, one module per file, built as one test binary.
+
+mod printer_roundtrip;
+mod spanish_input;

crates/ui-egui/tests/it/main.rs

@@ -0,0 +1,91 @@
+//! The crate's integration tests, one module per file, built as one test binary.
+//!
+//! `header_autofit_fonts.rs` and `keytips.rs` stay separate binaries: they set process-wide state
+//! (the installed-font catalog, a registered test command) that would leak into these tests.
+
+mod accounting_fill;
+mod advanced_filter;
+mod argument_names;
+mod autosave_persist;
+mod borders;
+mod cell_editor_caret;
+mod cell_pictures;
+mod chart_resize;
+mod clipboard;
+mod comments_pane;
+mod commit_after_pointing;
+mod committed_text_fields;
+mod context_menu_stays_open;
+mod control_timeout;
+mod dialog_button_row;
+mod dialog_confirm;
+mod dialog_focus;
+mod dialog_move;
+mod drag_cursor;
+mod file_menu;
+mod fill_handle_double_click;
+mod fill_handle_right_drag;
+mod fill_options_button;
+mod filter_list_scroll;
+mod filter_menu_enter;
+mod find_dialog_focus;
+mod floating_pictures;
+mod font_size_box;
+mod format_painter;
+mod formula_locale;
+mod formula_point_headers;
+mod formula_popup;
+mod freeze_handles;
+mod header_autofit;
+mod header_column_drag;
+mod host_chrome;
+mod hyperlink_ctrl_click;
+mod in_cell_editor_size;
+mod in_cell_editor_wrap;
+mod insert_copied_cells;
+mod interaction;
+mod interface_scale;
+mod keyboard_shortcuts;
+mod keytips_generated;
+mod menu_hover;
+mod merged_cells;
+mod more_colors;
+mod native_print;
+mod nowrap_line_breaks;
+mod number_stored_as_text;
+mod open_encrypted;
+mod outline;
+mod page_layout_view;
+mod page_setup_margins;
+mod paste_special_dialog;
+mod pivot_pane;
+mod popup_dismissal;
+mod protect_password;
+mod right_to_left;
+mod scroll_position;
+mod scrollbar_column_fill;
+mod selection;
+mod selection_fill;
+mod selection_glide;
+mod selection_scroll;
+mod sheet_navigator;
+mod sheet_tab_rename;
+mod sheet_tabs;
+mod show_objects;
+mod shrink_to_fit;
+mod sort_dialog_columns;
+mod symbol_glyphs;
+mod system_theme;
+mod table_headings;
+mod text_box_editing;
+mod text_overflow_scroll;
+mod touch_pan;
+mod trace_navigation;
+mod translated_form_fields;
+mod ui_clock;
+mod validation_alert;
+mod validation_input_message;
+mod wheel_zoom;
+mod whole_line_shortcuts;
+mod widgets;
+mod zoom_dialog;