pdfcraft/crates/ui-egui/tests/create.rs

//! Create a PDF and Reduce File Size in the real shell.

use printcraft_ui_egui::PrintCraftApp;

fn png() -> Vec<u8> {
    let mut out = Vec::new();
    {
        let mut enc = png::Encoder::new(&mut out, 8, 4);
        enc.set_color(png::ColorType::Rgb);
        enc.set_depth(png::BitDepth::Eight);
        let mut w = enc.write_header().unwrap();
        w.write_image_data(&[120u8; 8 * 4 * 3]).unwrap();
    }
    out
}

#[test]
fn opening_images_and_text_converts_them_to_new_pdfs() {
    let mut app = PrintCraftApp::new();
    app.open_bytes("photo.png", Some("/tmp/photo.png".into()), png()).unwrap();
    app.open_bytes("notes.txt", None, b"first line\nsecond line".to_vec()).unwrap();
    app.create_from_images(vec![("a.png".into(), png()), ("b.png".into(), png())]);
    assert!(app.execute("create.blank"));
    let docs = app.session.docs();
    let summary: Vec<(String, usize, bool)> = docs.iter().map(|d| (d.name.clone(), d.info.pages.len(), d.dirty)).collect();
    assert_eq!(
        summary,
        [("photo.pdf".to_string(), 1, true), ("notes.pdf".into(), 1, true), ("Images.pdf".into(), 2, true), ("Untitled.pdf".into(), 1, true)]
    );
    assert!(docs[0].path.is_none(), "a converted file has no PDF path yet: Save asks where");
    assert!(app.open_bytes("junk.png", None, b"\x89PNG\r\n\x1a\nnot really".to_vec()).is_err());
}

#[test]
fn reduce_file_size_writes_a_compact_copy() {
    let dir = std::env::temp_dir().join(format!("printcraft-reduce-{}", std::process::id()));
    std::fs::create_dir_all(&dir).unwrap();
    let out = dir.join("reduced.pdf");
    let mut app = PrintCraftApp::new();
    app.open_bytes("notes.txt", None, "lorem ipsum ".repeat(500).into_bytes()).unwrap();
    app.save_override = Some(out.to_string_lossy().into_owned());
    assert!(app.execute("optimize.reduce"));
    let bytes = std::fs::read(&out).unwrap();
    assert!(bytes.starts_with(b"%PDF-"));
    assert!(app.session.docs()[0].dirty, "the open document is unchanged");
}