text-size-adjust-does-not-affect-max-width-em.html

<!DOCTYPE html>
<meta content="width=device-width,initial-scale=1.0,minimum-scale=1.0" name="viewport">
<meta name="assert" content="text-size-adjust should not affect max-width specified in em.">
<link rel="help" href="https://drafts.csswg.org/css-size-adjust/#propdef-text-size-adjust">
<script src='/resources/testharness.js'></script>
<script src='/resources/testharnessreport.js'></script>
<script>
  function runTest() {
    // This should not be needed but is required to work around a bug in
    // Chrome's old autosizer due to computed style being updated during layout.
    // TODO(pdr): Remove this when b/340389272 launches.
    const forceLayout = document.body.offsetHeight;

    test(() => {
      // 1em = 16px font-size
      assert_equals(getComputedStyle(mw_1_with_lh_16)['max-width'], '16px');
    }, 'Resolved 1em max-width with specified 16px line-height and text-size-adjust: 150%');

    test(() => {
      assert_equals(mw_1_with_lh_16.getBoundingClientRect().width, 16);
    }, 'Actual 1em max-width with specified 16px line-height and text-size-adjust: 150%');

    test(() => {
      // 0.75em = 12px font-size
      assert_equals(getComputedStyle(mw_075_with_lh_16)['max-width'], '12px');
    }, 'Resolved 0.75em max-width with specified 16px line-height and text-size-adjust: 150%');

    test(() => {
      assert_equals(mw_075_with_lh_16.getBoundingClientRect().width, 12);
    }, 'Actual 0.75em max-width with specified 16px line-height and text-size-adjust: 150%');

    test(() => {
      // 1em = 16px font-size
      assert_equals(getComputedStyle(mw_1_with_fs_16)['max-width'], '16px');
    }, 'Resolved 1em max-width with specified 16px font-size and text-size-adjust: 150%');

    test(() => {
      assert_equals(mw_1_with_fs_16.getBoundingClientRect().width, 16);
    }, 'Actual 1em max-width with specified 16px font-size and text-size-adjust: 150%');

    test(() => {
      // 0.75em = 12px font-size
      assert_equals(getComputedStyle(mw_075_with_fs_16)['max-width'], '12px');
    }, 'Resolved 0.75em max-width with specified 16px font-size and text-size-adjust: 150%');

    test(() => {
      assert_equals(mw_075_with_fs_16.getBoundingClientRect().width, 12);
    }, 'Actual 0.75em max-width with specified 16px font-size and text-size-adjust: 150%');
  }
</script>
<body onload="runTest()">
  <div id="mw_1_with_lh_16" style="max-width: 1em; line-height: 16px; text-size-adjust: 150%;">test</div>
  <div id="mw_075_with_lh_16" style="max-width: 0.75em; line-height: 16px; text-size-adjust: 150%;">test</div>
  <div id="mw_1_with_fs_16" style="max-width: 1em; font-size: 16px; text-size-adjust: 150%;">test</div>
  <div id="mw_075_with_fs_16" style="max-width: 0.75em; font-size: 16px; text-size-adjust: 150%;">test</div>
</body>
chromium/third_party/blink/web_tests/wpt_internal/css/css-size-adjust/text-size-adjust-does-not-affect-max-width-em.html
