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Add SnapshotResults struct to egui_kittest (#5672)

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I got annoyed by all the slightly different variations of "collect
snapshot results and unwrap them at the end of test" I've written, so I
added a struct to make this nice and simple.

One controversial thing: It panics when dropped. I wanted to ensure
people cannot forget to unwrap the results at the end, and this was the
best thing I could come up with. I don't think this is possible via
clippy lint or something like that.

* [x] I have followed the instructions in the PR template
This commit is contained in:
lucasmerlin
2025-02-04 14:01:32 +01:00
committed by GitHub
parent 23ed49334e
commit b8051cc301
10 changed files with 135 additions and 53 deletions
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10
crates/egui_demo_lib/src/rendering_test.rs
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@@ -688,10 +688,11 @@ fn mul_color_gamma(left: Color32, right: Color32) -> Color32 {
mod tests {
use crate::ColorTest;
use egui_kittest::kittest::Queryable as _;
use egui_kittest::SnapshotResults;
#[test]
pub fn rendering_test() {
let mut errors = vec![];
let mut results = SnapshotResults::new();
for dpi in [1.0, 1.25, 1.5, 1.75, 1.6666667, 2.0] {
let mut color_test = ColorTest::default();
let mut harness = egui_kittest::Harness::builder()
@@ -708,12 +709,7 @@ mod tests {
harness.fit_contents();
let result = harness.try_snapshot(&format!("rendering_test/dpi_{dpi:.2}"));
if let Err(err) = result {
errors.push(err);
}
results.add(harness.try_snapshot(&format!("rendering_test/dpi_{dpi:.2}")));
}
assert!(errors.is_empty(), "Errors: {errors:#?}");
}
}