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red_knot_test: add support for diagnostic snapshotting

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This ties together everything from the previous commits.
Some interesting bits here are how the snapshot is generated
(where we include relevant info to make it easier to review
the snapshots) and also a tweak to how inline assertions are
processed.

This commit also includes some example snapshots just to get
a sense of what they look like. Follow-up work should add
more of these I think.
This commit is contained in:
Andrew Gallant 2025-02-04 14:51:54 -05:00 • committed by Andrew Gallant
parent 8d4679b3ae
commit a84b27e679
8 changed files with 308 additions and 18 deletions
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12
crates/red_knot_python_semantic/tests/mdtest.rs
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@ -8,20 +8,20 @@ use dir_test::{dir_test, Fixture};
)]
#[allow(clippy::needless_pass_by_value)]
fn mdtest(fixture: Fixture<&str>) {
let fixture_path = Utf8Path::new(fixture.path());
let absolute_fixture_path = Utf8Path::new(fixture.path());
let crate_dir = Utf8Path::new(env!("CARGO_MANIFEST_DIR"));
let snapshot_path = crate_dir.join("resources").join("mdtest").join("snapshots");
let workspace_root = crate_dir.ancestors().nth(2).unwrap();
let long_title = fixture_path.strip_prefix(workspace_root).unwrap();
let short_title = fixture_path.file_name().unwrap();
let relative_fixture_path = absolute_fixture_path.strip_prefix(workspace_root).unwrap();
let short_title = absolute_fixture_path.file_name().unwrap();
let test_name = test_name("mdtest", fixture_path);
let test_name = test_name("mdtest", absolute_fixture_path);
red_knot_test::run(
fixture_path,
absolute_fixture_path,
relative_fixture_path,
&snapshot_path,
long_title.as_str(),
short_title,
&test_name,
);