27 lines
993 B
HTML
27 lines
993 B
HTML
<!DOCTYPE html>
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<meta charset=utf-8>
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<title>Test RequestAnimationFrame Timestamps are monotonically increasing</title>
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<script src="/tests/SimpleTest/SimpleTest.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
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<script>
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var lastRequestAnimationFrameTimestamp = 0;
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var requestAnimationFrameCount = 20;
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var currentCount = 0;
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// Test that all timestamps are always increasing
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// and do not ever go backwards
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function rafCallback(aTimestamp) {
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SimpleTest.ok(aTimestamp > lastRequestAnimationFrameTimestamp,
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"New RequestAnimationFrame timestamp should be later than the previous RequestAnimationFrame timestamp");
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lastRequestAnimationFrameTimestamp = aTimestamp;
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if (currentCount == requestAnimationFrameCount) {
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SimpleTest.finish();
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} else {
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currentCount++;
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window.requestAnimationFrame(rafCallback);
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}
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}
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window.requestAnimationFrame(rafCallback);
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SimpleTest.waitForExplicitFinish();
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</script>
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