wpt / css / mediaqueries / preferences-reducedTransparency.tentative.https.html

Status: FAIL | Duration: 51ms | Subtests: 0/13 | Open test on wpt.live | wpt.fyi

TestTest SourceSubtests (0/13)

Data from commit:
a50cb89 wpt: run reference-named files which are themselves tests (#836) (2026-09-03)

SubtestStatusMessage
navigator.preferences.reducedTransparency supportedFAILassert_true: navigator.preferences defined expected true got false
navigator.preferences.reducedTransparency.override supportedFAILcannot convert 'null' or 'undefined' to object
navigator.preferences.reducedTransparency.value supportedFAILcannot convert 'null' or 'undefined' to object
navigator.preferences.reducedTransparency.validValues supportedFAILcannot convert 'null' or 'undefined' to object
navigator.preferences.reducedTransparency.requestOverride() with invalid value throwsFAIL
navigator.preferences.reducedTransparency.clearOverride() supportedFAIL
navigator.preferences.reducedTransparency.requestOverride(null) works like clearOverride()FAIL
navigator.preferences.reducedTransparency.requestOverride('') works like clearOverride()FAIL
navigator.preferences.reducedTransparency.requestOverride() updates (prefers-reduced-transparency)FAIL
navigator.preferences.reducedTransparency fires change event when requesting overrideFAILcannot convert 'null' or 'undefined' to object
navigator.preferences.reducedTransparency fires change event when requesting override (without value change)FAIL
navigator.preferences.reducedTransparency fires change event when clearing overrideFAIL
navigator.preferences.reducedTransparency fires change event when clearing override (without value change)FAIL

/css/mediaqueries/preferences-reducedTransparency.tentative.https.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>WebPreferences Test: reducedTransparency attribute tests</title>
    <link rel="author" title="Luke Warlow" href="mailto:lwarlow@igalia.com" />
    <link rel="help" href="https://drafts.csswg.org/mediaqueries-5/#auto-pref%E2%91%A0" />
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
    <script src=./resources/preferences-helper.js></script>
  </head>
  <body>
    <script>
      test(() => {
        assert_true('preferences' in navigator, 'navigator.preferences defined');
        assert_true('reducedTransparency' in navigator.preferences, 'navigator.preferences.reducedTransparency defined');
      }, "navigator.preferences.reducedTransparency supported");
      test(() => {
        assert_true('override' in navigator.preferences.reducedTransparency, 'navigator.preferences.reducedTransparency.override defined');
        assert_equals(navigator.preferences.reducedTransparency.override, null);
      }, "navigator.preferences.reducedTransparency.override supported");
      test(() => {
        assert_true('value' in navigator.preferences.reducedTransparency, 'navigator.preferences.reducedTransparency.value defined');
        assert_equals(navigator.preferences.reducedTransparency.value, 'no-preference');
      }, "navigator.preferences.reducedTransparency.value supported");
      test(() => {
        assert_true('validValues' in navigator.preferences.reducedTransparency, 'navigator.preferences.reducedTransparency.validValues defined');
        assert_true(navigator.preferences.reducedTransparency.validValues.includes('reduce'), 'navigator.preferences.reducedTransparency.validValues includes "reduce"');
        assert_true(navigator.preferences.reducedTransparency.validValues.includes('no-preference'), 'navigator.preferences.reducedTransparency.validValues includes "no-preference"');
      }, "navigator.preferences.reducedTransparency.validValues supported");
      promise_test((t) => {
        assert_true('requestOverride' in navigator.preferences.reducedTransparency, 'navigator.preferences.reducedTransparency.requestOverride defined');
        return navigator.preferences.reducedTransparency.requestOverride('this-is-an-invalid-value')
          .then(() => {
            assert_unreached('requestOverride with invalid value should not resolve');
          })
          .catch((e) => {
            assert_true(e instanceof DOMException);
            assert_equals(navigator.preferences.reducedTransparency.override, null);
            t.done();
          });
      }, "navigator.preferences.reducedTransparency.requestOverride() with invalid value throws");
      promise_test(async (t) => {
        assert_true('clearOverride' in navigator.preferences.reducedTransparency, 'navigator.preferences.reducedTransparency.clearOverride() defined');
        await navigator.preferences.reducedTransparency.requestOverride('reduce');
        assert_equals(navigator.preferences.reducedTransparency.override, 'reduce');
        navigator.preferences.reducedTransparency.clearOverride();
        assert_equals(navigator.preferences.reducedTransparency.override, null);
        t.done();
      }, "navigator.preferences.reducedTransparency.clearOverride() supported");
      promise_test(async (t) => {
        await navigator.preferences.reducedTransparency.requestOverride('reduce');
        assert_equals(navigator.preferences.reducedTransparency.override, 'reduce');
        await navigator.preferences.reducedTransparency.requestOverride(null);
        assert_equals(navigator.preferences.reducedTransparency.override, null);
        t.done();
      }, "navigator.preferences.reducedTransparency.requestOverride(null) works like clearOverride()");
      promise_test(async (t) => {
        await navigator.preferences.reducedTransparency.requestOverride('reduce');
        assert_equals(navigator.preferences.reducedTransparency.override, 'reduce');
        await navigator.preferences.reducedTransparency.requestOverride('');
        assert_equals(navigator.preferences.reducedTransparency.override, null);
        t.done();
      }, "navigator.preferences.reducedTransparency.requestOverride('') works like clearOverride()");
      promise_test(async (t) => {
        await navigator.preferences.reducedTransparency.requestOverride('no-preference');
        assert_true(window.matchMedia('(prefers-reduced-transparency: no-preference)').matches, '(prefers-reduced-transparency: no-preference) matches');
        assert_equals(navigator.preferences.reducedTransparency.value, 'no-preference');
        await navigator.preferences.reducedTransparency.requestOverride('reduce');
        assert_true(window.matchMedia('(prefers-reduced-transparency: reduce)').matches, '(prefers-reduced-transparency: reduce) matches');
        assert_equals(navigator.preferences.reducedTransparency.value, 'reduce');
        navigator.preferences.reducedTransparency.clearOverride();
        assert_true(window.matchMedia('(prefers-reduced-transparency: no-preference)').matches);
        assert_equals(navigator.preferences.reducedTransparency.value, 'no-preference');
        t.done();
      }, "navigator.preferences.reducedTransparency.requestOverride() updates (prefers-reduced-transparency)");
      async_test((t) => {
        t.add_cleanup(() => {
          navigator.preferences.reducedTransparency.clearOverride();
          navigator.preferences.reducedTransparency.onchange = null;
        });
        navigator.preferences.reducedTransparency.onchange = t.step_func_done();
        navigator.preferences.reducedTransparency.requestOverride('reduce');
      }, "navigator.preferences.reducedTransparency fires change event when requesting override");
      async_test((t) => {
        t.add_cleanup(() => {
          navigator.preferences.reducedTransparency.clearOverride();
          navigator.preferences.reducedTransparency.onchange = null;
        });
        navigator.preferences.reducedTransparency.onchange = t.step_func_done();
        navigator.preferences.reducedTransparency.requestOverride('no-preference');
      }, "navigator.preferences.reducedTransparency fires change event when requesting override (without value change)");
      promise_test(async (t) => {
        t.add_cleanup(() => {
          navigator.preferences.reducedTransparency.clearOverride();
          navigator.preferences.reducedTransparency.onchange = null;
        });
        await navigator.preferences.reducedTransparency.requestOverride('reduce');
        const eventPromise = changeEventPromise("reducedTransparency", t);
        await navigator.preferences.reducedTransparency.clearOverride();
        await eventPromise;
      }, "navigator.preferences.reducedTransparency fires change event when clearing override");
      promise_test(async (t) => {
        t.add_cleanup(() => {
          navigator.preferences.reducedTransparency.clearOverride();
          navigator.preferences.reducedTransparency.onchange = null;
        });
        await navigator.preferences.reducedTransparency.requestOverride('no-preference');
        const eventPromise = changeEventPromise("reducedTransparency", t);
        await navigator.preferences.reducedTransparency.clearOverride();
        await eventPromise;
      }, "navigator.preferences.reducedTransparency fires change event when clearing override (without value change)");
    </script>
  </body>
</html>