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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
| commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
| tree | f435a8308119effd964b339f76abb83a57c29483 /testing/web-platform/tests/css/css-values/ch-recalc-on-font-load.html | |
| parent | Initial commit. (diff) | |
| download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip | |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/css/css-values/ch-recalc-on-font-load.html')
| -rw-r--r-- | testing/web-platform/tests/css/css-values/ch-recalc-on-font-load.html | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/css-values/ch-recalc-on-font-load.html b/testing/web-platform/tests/css/css-values/ch-recalc-on-font-load.html new file mode 100644 index 0000000000..b13f643ebe --- /dev/null +++ b/testing/web-platform/tests/css/css-values/ch-recalc-on-font-load.html @@ -0,0 +1,79 @@ +<!DOCTYPE html> +<title>Length unit 'ch' should be recalculated after loading a web font</title> +<link rel="help" href="https://www.w3.org/TR/css-font-loading-3/#font-face-load"> +<link rel="help" href="https://www.w3.org/TR/css-values-3/#font-relative-lengths"> +<link rel="author" href="mailto:xiaochengh@chromium.org"> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<style> +.container { + font: 25px/1 "custom font", monospace; +} + +.test { + width: 1ch; +} +</style> + +<div class="container"> + <div class="test"></div> +</div> + +<div class="container" style="display: contents"> + <div class="test"></div> +</div> + +<div class="container" style="display: none"> + <div class="test"></div> +</div> + +<script> +function parseWidthInPx(element) { + const value = getComputedStyle(element).width; + if (!value.endsWith('px')) + return NaN; + return parseFloat(value); +} + +const testCases = document.querySelectorAll('.test'); + +const asyncTests = [ + async_test('ch in a normal div should be recalculated after loading a web font'), + async_test('ch in display:contents should be recalculated after loading a web font'), + async_test('ch in display:none should be recalculated after loading a web font') +]; + +// Before loading custom font, tests should be rendered with monospace +// fallback and have a '1ch' measurement much shorter than 25px. +for (let i = 0; i < testCases.length; ++i) { + asyncTests[i].step(() => { + const widthPx = parseWidthInPx(testCases[i]); + assert_less_than(widthPx, 24); + }); +} + +// Insert custom font into style sheet and load it +const customFont = new FontFace('custom font', 'url(/fonts/Ahem.ttf)'); +document.fonts.add(customFont); + +// After loading custom font, tests should be rendered with the custom font, +// which is Ahem, and have a '1ch' measurement that equals 25px. +customFont.load().then( + () => { + for (let i = 0; i < testCases.length; ++i) { + asyncTests[i].step(() => { + const widthPx = parseWidthInPx(testCases[i]); + assert_approx_equals(widthPx, 25, 0.1); + asyncTests[i].done(); + }); + } + }, + () => { + for (let i = 0; i < testCases.length; ++i) { + asyncTests[i].step(() => { + assert_unreached('Failed to load font'); + }); + } + } +); +</script> |