chromium/third_party/blink/web_tests/external/wpt/css/css-anchor-position/try-tactic-sizing.html

<!DOCTYPE html>
<title>CSS Anchor Positioning: try-tactic, sizing properties</title>
<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#typedef-position-try-fallbacks-try-tactic">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
  @position-try --pf {
    left:50px;
    top:50px;

    min-width: 1px;
    min-height: 2px;
    max-width: 100px;
    max-height: 200px;
  }
  #cb {
    position: absolute;
    width: 400px;
    height: 400px;
    border: 1px solid black;
  }
  #target {
    position: absolute;
    left: 99999px; /* force fallback */
    width: 30px;
    height: 40px;
    background-color: skyblue;
  }
</style>
<div id=cb>
  <div id=target></div>
</div>
<script>
  test(() => {
    target.style.positionTryFallbacks = '--pf flip-block';
    let cs = getComputedStyle(target);
    assert_equals(cs.width, '30px');
    assert_equals(cs.height, '40px');
    assert_equals(cs.minWidth, '1px');
    assert_equals(cs.minHeight, '2px');
    assert_equals(cs.maxWidth, '100px');
    assert_equals(cs.maxHeight, '200px');
  }, 'flip-block does not affect sizing');

  test(() => {
    target.style.positionTryFallbacks = '--pf flip-inline';
    let cs = getComputedStyle(target);
    assert_equals(cs.width, '30px');
    assert_equals(cs.height, '40px');
    assert_equals(cs.minWidth, '1px');
    assert_equals(cs.minHeight, '2px');
    assert_equals(cs.maxWidth, '100px');
    assert_equals(cs.maxHeight, '200px');
  }, 'flip-inline does not affect sizing');

  test(() => {
    target.style.positionTryFallbacks = '--pf flip-start';
    let cs = getComputedStyle(target);
    assert_equals(cs.width, '40px');
    assert_equals(cs.height, '30px');
    assert_equals(cs.minWidth, '2px');
    assert_equals(cs.minHeight, '1px');
    assert_equals(cs.maxWidth, '200px');
    assert_equals(cs.maxHeight, '100px');
  }, 'flip-start affects sizing');
</script>