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M11: test: a palette stream is read up to exactly 16 KiB of raw data

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AmsdeUCdTaD72jkDw2pJKY
This commit is contained in:
Grzegorz Martens
2026-10-31 01:15:52 +01:00
co-authored by Claude Opus 5.5
parent 6ad95f0aa4
commit 24c6529f77
1 changed files with 17 additions and 9 deletions
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crates/optimize/tests/optimize.rs
+17 -9
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@@ -3609,17 +3609,25 @@ fn an_indexed_image_is_averaged_only_in_a_spelling_it_can_read() {
assert_eq!(width(&|_| vec![("ColorSpace", indexed(Object::name("Indexed"), rgb(), Object::Real(1.0), table()))]), kept, "a real hival");
let long = Object::String(pdfcraft_cos::PdfString::literal([vec![0, 0, 0, 255, 255, 255], vec![0; 4097]].concat()));
assert_eq!(width(&|_| vec![("ColorSpace", indexed(Object::name("Indexed"), rgb(), 1.into(), long.clone()))]), kept, "a string past a palette");
// 16 KiB of raw data is all a table may take, whatever it decodes to.
let mut d = Dict::new();
d.set(b"Filter".to_vec(), Object::name("ASCIIHexDecode"));
let hex: Vec<u8> = b"000000FFFFFF".iter().copied().chain(std::iter::repeat_n(b' ', 16385)).chain(*b">").collect();
assert_eq!(
width(&|doc: &mut Document| {
let large = doc.add(Object::Stream(pdfcraft_cos::Stream::from_raw(d.clone(), hex.clone())));
vec![("ColorSpace", indexed(Object::name("Indexed"), rgb(), 1.into(), Object::Ref(large)))]
}),
kept,
"a stream too large to be read for each image, whatever it decodes to"
);
let table_of = |raw: usize| {
let d = d.clone();
let hex: Vec<u8> = b"000000FFFFFF".iter().copied().chain(std::iter::repeat_n(b' ', raw - 13)).chain(*b">").collect();
move |doc: &mut Document| doc.add(Object::Stream(pdfcraft_cos::Stream::from_raw(d.clone(), hex.clone())))
};
for (raw, expected) in [(16384, averaged), (16385, kept)] {
let add = table_of(raw);
assert_eq!(
width(&|doc: &mut Document| {
let table = add(doc);
vec![("ColorSpace", indexed(Object::name("Indexed"), rgb(), 1.into(), Object::Ref(table)))]
}),
expected,
"a stream of {raw} bytes"
);
}
let key = || Object::Array(vec![0.into(), 0.into()]);
assert_eq!(width(&|_| vec![("ColorSpace", plain()), ("Mask", key())]), kept, "a colour key, indexed");
assert_eq!(width(&|_| vec![("ColorSpace", Object::name("DeviceGray")), ("Mask", key())]), kept, "a colour key, grey");