forked from mirrors/gecko-dev
fac08e5f9c
Depends on D50851 Differential Revision: https://phabricator.services.mozilla.com/D50852 --HG-- extra : moz-landing-system : lando
38 lines
1.2 KiB
JavaScript
38 lines
1.2 KiB
JavaScript
/* Any copyright is dedicated to the Public Domain.
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http://creativecommons.org/publicdomain/zero/1.0/ */
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const URL =
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"http://mochi.test:8888/browser/toolkit/components/thumbnails/" +
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"test/background_red_scroll.html";
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function isRedThumbnailFuzz(r, g, b, expectedR, expectedB, expectedG, aFuzz) {
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return (
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Math.abs(r - expectedR) <= aFuzz &&
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Math.abs(g - expectedG) <= aFuzz &&
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Math.abs(b - expectedB) <= aFuzz
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);
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}
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// Test for black borders caused by scrollbars.
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add_task(async function thumbnails_bg_bug727765() {
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// Create a tab with a page with a red background and scrollbars.
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await BrowserTestUtils.withNewTab(
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{
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gBrowser,
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url: URL,
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},
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async browser => {
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await captureAndCheckColor(255, 0, 0, "we have a red thumbnail");
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// Check the thumbnail color of the bottom right pixel.
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await whenFileExists(URL);
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let data = await retrieveImageDataForURL(URL);
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let [r, g, b] = [].slice.call(data, -4);
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let fuzz = 2; // Windows 8 x64 blends with the scrollbar a bit.
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var message =
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"Expected red thumbnail rgb(255, 0, 0), got " + r + "," + g + "," + b;
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ok(isRedThumbnailFuzz(r, g, b, 255, 0, 0, fuzz), message);
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}
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);
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});
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