4ee3e7e9f4
This has the side effect of firing the media query list change event for printing, but it also improves the print emulation on DevTools, which is an extra win! Differential Revision: https://phabricator.services.mozilla.com/D154906
166 lines
4.6 KiB
HTML
166 lines
4.6 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<!--
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https://bugzilla.mozilla.org/show_bug.cgi?id=819930
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-->
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<meta charset="utf-8">
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<title>Test for Bug 819930</title>
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<script src="/tests/SimpleTest/SimpleTest.js"></script>
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<script src="/tests/SimpleTest/WindowSnapshot.js"></script>
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<link rel="stylesheet" href="/tests/SimpleTest/test.css" />
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<style>
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@media braille {
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body {
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background-color: rgb(255, 255, 0);
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}
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}
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@media embossed {
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body {
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background-color: rgb(210, 180, 140);
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}
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}
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@media handheld {
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body {
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background-color: rgb(0, 255, 0);
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}
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}
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@media print {
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body {
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background-color: rgb(0, 255, 255);
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}
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}
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@media projection {
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body {
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background-color: rgb(30, 144, 255);
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}
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}
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@media screen {
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body {
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background-color: green;
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}
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}
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@media speech {
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body {
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background-color: rgb(192, 192, 192);
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}
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}
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@media tty {
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body {
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background-color: rgb(255, 192, 203);
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}
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}
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@media tv {
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body {
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background-color: rgb(75, 0, 130);
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}
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}
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</style>
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=819930">Mozilla Bug 819930</a>
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<p id="display"></p>
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<div id="content" style="display: none"></div>
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<script>
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function waitForColorSchemeToBe(scheme) {
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return new Promise(resolve => {
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let mq = matchMedia(`(prefers-color-scheme: ${scheme})`);
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if (mq.matches) {
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resolve();
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} else {
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mq.addEventListener("change", resolve, { once: true });
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}
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});
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}
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add_setup(async function() {
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// Set a dark color scheme so that we can properly test the print override.
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await SpecialPowers.pushPrefEnv({ set: [["layout.css.prefers-color-scheme.content-override", 0]] });
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await waitForColorSchemeToBe("dark");
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});
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add_task(function() {
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let tests = [
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{name: 'braille', value: 'rgb(255, 255, 0)'},
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{name: 'embossed', value: 'rgb(210, 180, 140)'},
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{name: 'handheld', value: 'rgb(0, 255, 0)'},
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{name: 'print', value: 'rgb(0, 255, 255)'},
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{name: 'projection', value: 'rgb(30, 144, 255)'},
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{name: 'speech', value: 'rgb(192, 192, 192)'},
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{name: 'tty', value: 'rgb(255, 192, 203)'},
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{name: 'tv', value: 'rgb(75, 0, 130)'},
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];
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let originalColor = 'rgb(0, 128, 0)';
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let body = document.body;
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let getColor = function() {
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return window.getComputedStyle(body).backgroundColor;
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};
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for (let test of tests) {
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// Emulate the given media
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SpecialPowers.emulateMedium(window, test.name);
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is(getColor(), test.value, 'emulating ' + test.name + ' produced ' +
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'correct rendering');
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ok(matchMedia(test.name).matches, "Media matches");
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if (test.value == "print") {
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ok(matchMedia("(prefers-color-scheme: light)").matches, "color-scheme is overridden when emulating print");
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}
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// Do the @media screen rules get applied after ending the emulation?
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SpecialPowers.stopEmulatingMedium(window);
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is(getColor(), originalColor, 'Ending ' + test.name +
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' emulation restores style for original medium');
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ok(!matchMedia(test.name).matches, "Media no longer matches");
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ok(!matchMedia("(prefers-color-scheme: light)").matches, "color-scheme override should be restored");
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// CSS media types are case-insensitive; we should be too.
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SpecialPowers.emulateMedium(window, test.name.toUpperCase());
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is(getColor(), test.value,
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test.name + ' emulation is case-insensitive');
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SpecialPowers.stopEmulatingMedium(window);
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}
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is(getColor(), originalColor, 'No emulation');
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// Emulating screen should produce the same rendering as when there is
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// no emulation in effect
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SpecialPowers.emulateMedium(window, 'screen');
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is(getColor(), originalColor, 'Emulating screen produces original rendering');
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SpecialPowers.stopEmulatingMedium(window);
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is(getColor(), originalColor, 'No emulation, shouldn\'t change');
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// Screen should be case-insensitive too
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SpecialPowers.emulateMedium(window, 'SCREEN');
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is(getColor(), originalColor, 'screen emulation is case-insensitive');
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SpecialPowers.stopEmulatingMedium(window);
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is(getColor(), originalColor, 'No emulation, shouldn\'t change');
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// An invalid parameter shouldn't fail. Given the CSS rules above,
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// an invalid parameter should result in a different rendering from any
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// produced thus far
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SpecialPowers.emulateMedium(window, 'clay');
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let invalid = getColor();
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tests.push({name: 'screen', value: 'green'});
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tests.forEach(function(test) {
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isnot(invalid, test.value, 'Emulating invalid type differs from ' +
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test.name);
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});
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SpecialPowers.stopEmulatingMedium(window);
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is(getColor(), originalColor, 'No emulation, shouldn\'t change');
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})
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</script>
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