Barry Pollard
1d96042631
Automatic update from web-platform-tests Update DeviceMemory thresholds I2S: https://groups.google.com/a/chromium.org/g/blink-dev/c/vXtAmrVZeDk Change-Id: I3d54bb17743517a8e34078ef28dacc2774037380 Bug: 454354290 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7410045 Commit-Queue: Barry Pollard <barrypollard@chromium.org> Reviewed-by: Yoav Weiss (@Shopify) <yoavweiss@chromium.org> Reviewed-by: Michal Mocny <mmocny@chromium.org> Cr-Commit-Position: refs/heads/main@{#1573800} -- wpt-commits: 3fd3ec14179d4301a47953f947e0686649db65d9 wpt-pr: 57280
18 lines
767 B
JavaScript
18 lines
767 B
JavaScript
function isPowerOfTwo(n) {
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const log2 = Math.log2(n);
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return log2 == Math.ceil(log2);
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}
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// Note the spec suggests applying implementation-defined min and max limits
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// to reduce fingerprinting risk for less common memory configurations.
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// However, it does not recommend limits so these are not tested in WPT.
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// These should be tested by implementors.
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test(function() {
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assert_equals(typeof navigator.deviceMemory, "number",
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"navigator.deviceMemory returns a number");
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assert_true(navigator.deviceMemory >= 0,
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"navigator.deviceMemory returns a positive value");
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assert_true(isPowerOfTwo(navigator.deviceMemory),
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"navigator.deviceMemory returns a power of 2");
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}, "navigator.deviceMemory is a positive number, a power of 2");
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