1 files changed, 42 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/css-values/media-progress-computed.tentative.html b/testing/web-platform/tests/css/css-values/media-progress-computed.tentative.html
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index 0000000000..b2b9c6662a
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+++ b/testing/web-platform/tests/css/css-values/media-progress-computed.tentative.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<link rel="help" href="https://drafts.csswg.org/css-values-5/#media-progress-func">
+<link rel="author" title="sakhapov@chromium.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../support/numeric-testcommon.js"></script>
+<div id="target"></div>
+<style>
+#target {
+  font-size: 10px;
+}
+:root {
+  width: 100vw;
+  height: 100vh;
+}
+</style>
+<script>
+// innerWidth and innerHeight have lossy precision, see
+// https://github.com/w3c/csswg-drafts/issues/5260.
+let { width, height } = document.documentElement.getBoundingClientRect();
+
+// Identity tests
+// NOTE(emilio): We provide custom messages so that the test name doesn't
+// depend on the viewport size (since in testharness.js files the viewport size is
+// not guaranteed to be fixed, unlike in reftests).
+test_math_used('media-progress(height from 0px to 1px)', height, { type:'number', 'msg': 'media-progress() identity check' });
+
+// Nestings
+test_math_used('media-progress(height from media-progress(height from 0px to 1px) * 1px to media-progress(height from 0px to 1px) * 1px)', '0', {type:'number'});
+
+test_math_used('media-progress(height from media-progress(height from 0px to 1px) * 0.5px to media-progress(height from 0px to 1px) * 1px)', '1', {type:'number'});
+
+// General calculations.
+test_math_used('calc(media-progress(width from 0px to 50px) * 10px + 100px)', (width / 50 * 10 + 100) + 'px', { msg: 'media-progress() with length product' });
+test_math_used('calc(media-progress(height from 10px to sign(50px - 500em) * 10px))', (height - 10) / (-10 - 10), { type:'number', msg: 'media-progress with complex to calculation' });
+
+// Type checking
+test_math_used('calc(media-progress(width from 0px to 1px) * 1px)', width + 'px', { msg: 'media-progress() as length' });
+test_math_used('calc(media-progress(height from 0px to 1px) * 1s)', height + 's', { type:'time', msg: 'media-progress() as time' });
+test_math_used('calc(media-progress(width from 0px to 1px) * 1deg)', width + 'deg', { type:'angle', approx:0.001, msg: 'media-progress() as angle' });
+</script>