resource-selection-source-media-env-change.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /html/semantics/embedded-content/media-elements/loading-the-media-resource/resource-selection-source-media-env-change.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>the &lt;source> media attribute: no reaction to environment change</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<div id=log></div>

<iframe src="resources/media-min-width.html" width="300"></iframe>

<script>

// promises for the iframed test to resolve

let beforeEnvChange = new Promise((resolve, reject) => {

  window[0].resolveBeforeEnvChange = resolve;

});

let afterEnvChange = new Promise((resolve, reject) => {

  window[0].resolveAfterEnvChange = resolve;

});

let afterLoadCalled = new Promise((resolve, reject) => {

  window[0].resolveAfterLoadCalled = resolve;

});

const t = promise_test(async () => {

  [beforeEnvChange, afterEnvChange, afterLoadCalled] = await Promise.all([ beforeEnvChange, afterEnvChange, afterLoadCalled ]);

  assert_equals(beforeEnvChange, '#a', 'beforeEnvChange');

  assert_equals(afterEnvChange, '#a', 'afterEnvChange');

  assert_equals(afterLoadCalled, '#b', 'afterLoadCalled');

});

</script>