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Change Harness::run to run until no more repaints are requested (#5580)

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Previously, `Harness::run` just called `Harness::step` 3 times. If that
wasn't enough, tests would often call run multiple times so all
animations would finish properly.

Also, I introduced `HarnessBuilder::with_step_dt` to customize with how
big of a dt each frame is called. I set the default to 1.0 / 6.0 (~6fps)
so we don't waste cpu in tests waiting on animations.

`HarnessBuilder::max_steps` allows us to control how many steps
`Harness::run` should run before panicing.
The default is 6, so we run for up to 1.0 logical seconds (six frames at
6 fps), which should be enough to finish most animations.

Turns out a lot of snapshots where rendered before fully shown and had a
light opacity, those are now fixed.

* [x] I have followed the instructions in the PR template
This commit is contained in:
lucasmerlin
2025-01-07 08:33:44 +01:00
committed by GitHub
parent 35860418ac
commit 52060c0c41
38 changed files with 230 additions and 97 deletions
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2
crates/egui_demo_lib/src/demo/demo_app_windows.rs
View File

@@ -397,7 +397,7 @@ mod tests {
harness.set_size(Vec2::new(size.width as f32, size.height as f32));
// Run the app for some more frames...
harness.run();
harness.run_ok();
let mut options = SnapshotOptions::default();
// The Bézier Curve demo needs a threshold of 2.1 to pass on linux

22
crates/egui_demo_lib/src/demo/modals.rs
View File

@@ -183,12 +183,13 @@ mod tests {
harness.get_by_role(Role::ComboBox).click();
harness.run();
// Harness::run would fail because we keep requesting repaints to simulate progress.
harness.run_ok();
assert!(harness.ctx.memory(|mem| mem.any_popup_open()));
assert!(harness.state().user_modal_open);
harness.press_key(Key::Escape);
harness.run();
harness.run_ok();
assert!(!harness.ctx.memory(|mem| mem.any_popup_open()));
assert!(harness.state().user_modal_open);
}
@@ -238,17 +239,11 @@ mod tests {
results.push(harness.try_snapshot("modals_1"));
harness.get_by_label("Save").click();
// TODO(lucasmerlin): Remove these extra runs once run checks for repaint requests
harness.run();
harness.run();
harness.run();
harness.run_ok();
results.push(harness.try_snapshot("modals_2"));
harness.get_by_label("Yes Please").click();
// TODO(lucasmerlin): Remove these extra runs once run checks for repaint requests
harness.run();
harness.run();
harness.run();
harness.run_ok();
results.push(harness.try_snapshot("modals_3"));
for result in results {
@@ -272,14 +267,11 @@ mod tests {
initial_state,
);
// TODO(lucasmerlin): Remove these extra runs once run checks for repaint requests
harness.run();
harness.run();
harness.run();
harness.run_ok();
harness.get_by_label("Yes Please").simulate_click();
harness.run();
harness.run_ok();
// This snapshots should show the progress bar modal on top of the save modal.
harness.snapshot("modals_backdrop_should_prevent_focusing_lower_area");