Introduces a multi-layered testing strategy for the libcosmic widget toolkit:
- Visual snapshot testing: Renders widgets via tiny-skia software renderer and
compares pixel output against reference PNGs. Generates diff images on failure.
Covers containers, dividers, text styles, progress bars, and layouts.
- Widget unit tests: Thorough behavioral tests for segmented button model
(selection, ordering, data storage, enable/disable, closable, indent),
calendar model (month navigation, year wrapping, date selection, grid layout),
spin button (clamping, increment/decrement, float support), and color picker.
- Property-based tests (proptest): Randomized input testing for spin button
bounds invariants, calendar first-day-of-week correctness, segmented model
length/clear/toggle invariants, and theme spacing monotonicity.
- Theme consistency tests: Validates all four theme variants (dark, light,
high-contrast dark/light) have valid spacing, corner radii ordering,
non-zero-alpha colors, visible text-on-background, and RON round-trip
serialization.
- Expanded inline tests: 16 new spin_button unit tests covering increment,
decrement, clamping, float types, and constructor value bounds.
- CI integration: New visual-tests job runs snapshot, theme, property, and
widget tests with artifact upload on failure for snapshot diffs.
https://claude.ai/code/session_01P3WLXMif9wmNXbWDo5FhRQ
* fix: compiling on windows requires cosmic-icons in project root
crabtime provides crabtime::WORKSPACE_PATH to refer to the
CARGO_MANIFEST_DIR of the top level crate being built, which means when
building libcosmic directly, crabtime::WORKSPACE_PATH will work, but
when building it as a dependency of another crate,
crabtime::WORKSPACE_PATH will no longer refer to the path to libcosmic.
I don't think there's a good workaround, since when in the context of
crabtime, CARGO_MANIFEST_DIR refers to the path to the crate generated
by crabtime rather than to libcosmic.
This replaces crabtime with a simple build.rs script that generates a
file in OUT_DIR.
* fix: do not generate icon bundle for unix targets
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Co-authored-by: Michael Aaron Murphy <michael@mmurphy.dev>
The string cache used by ustr pre-allocates 12 MB, even if we're
only using it for a few font family names. We can therefore
manage our own set of leaked strings to reduce memory usage by 12 MB.
