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Test Info: Warnings
- This test has a WPT meta file that expects 1 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /viewport-segments/viewport-segments-change-event.https.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script>
'use strict';
promise_test(async (t) => {
t.add_cleanup(async () => {
await test_driver.clear_display_features();
});
// There is always one segment the dimension of the viewport.
assert_true(matchMedia('(horizontal-viewport-segments: 1)').matches);
assert_true(matchMedia('(vertical-viewport-segments: 1)').matches);
assert_false(matchMedia('(horizontal-viewport-segments: 2)').matches);
assert_false(matchMedia('(vertical-viewport-segments: 2)').matches);
const horizontalViewportSegmentsMQL = window.matchMedia('(horizontal-viewport-segments: 2)');
const verticalViewportSegmentsMQL = window.matchMedia('(vertical-viewport-segments: 2)');
let promise = new Promise(resolve => {
horizontalViewportSegmentsMQL.addEventListener(
'change',
() => { resolve(horizontalViewportSegmentsMQL.matches); },
{ once: true }
);
});
await test_driver.set_display_features([{
orientation: 'vertical', maskLength: 20, offset: 20
}]);
assert_true(await promise, 'The horizontal viewport segments media query should match.');
promise = new Promise(resolve => {
verticalViewportSegmentsMQL.addEventListener(
'change',
() => { resolve(verticalViewportSegmentsMQL.matches); },
{ once: true }
);
});
await test_driver.set_display_features([{
orientation: 'horizontal', maskLength: 20, offset: 20
}]);
assert_true(await promise, 'The vertical viewport segments media query should match.');
}, 'Tests the Viewport Segments Media Query change event handler.');
</script>
</head>
<body>
</body>
</html>