<!DOCTYPE html>
<link rel="help" href="http://www.w3.org/TR/CSS21/visuren.html#anonymous-block-level" />
<link rel="help" href="https://www.w3.org/TR/cssom-view-1/#dom-htmlelement-offsetwidth" />
<link rel="help" href="https://www.w3.org/TR/cssom-view-1/#dom-range-getboundingclientrect" />
<link rel="author" title="Koji Ishii" href="mailto:kojii@chromium.org" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
div {
  width: 500px;
}
.inline-block {
  display: inline-block;
  width: 100px;
  height: 1px;
  background: blue;
}
.w200 {
  width: 200px;
}
</style>
<body>
  <!-- The `<span>` contains an empty block child -->
  <div>
    <span id="t1" class="target">
      <div class="inline-block"></div>
      <div></div>
      <div class="inline-block w200"></div>
    </span>
  </div>

  <!-- The `<span>` contains non-empty block child -->
  <div>
    <span id="t2" class="target">
      <div class="inline-block"></div>
      <div>non-empty</div>
      <div class="inline-block w200"></div>
    </span>
  </div>

  <!-- The `<span>` contains empty but non-zero height block child -->
  <div>
    <span id="t3" class="target">
      <div class="inline-block"></div>
      <div style="height: 100px"></div>
      <div class="inline-block w200"></div>
    </span>
  </div>
<script>
// The `getBoundingClientRect` spec[1] says to ignore rects "of which the
// height or width is not zero."
// [1] https://www.w3.org/TR/cssom-view-1/#dom-range-getboundingclientrect
function testGetBoundingClientRect() {
  test(()=> { assert_equals(t1.getBoundingClientRect().width, 200); },
                            `t1.getBoundingClientRect().width`);
  test(()=> { assert_equals(t2.getBoundingClientRect().width, 500); },
                            `t2.getBoundingClientRect().width`);
  test(()=> { assert_equals(t3.getBoundingClientRect().width, 500); },
                            `t3.getBoundingClientRect().width`);
}
testGetBoundingClientRect();

// Skip testing `offsetWidth` because the 3 implementations return different
// values for these cases, and the expectations aren't clear from the spec.
// https://github.com/w3c/csswg-drafts/issues/6588
function testOffsetWidth() {
  test(()=> { assert_equals(t1.offsetWidth, 200); }, `t1.offsetWidth`);
  test(()=> { assert_equals(t2.offsetWidth, 500); }, `t2.offsetWidth`);
  test(()=> { assert_equals(t3.offsetWidth, 500); }, `t3.offsetWidth`);
}
// testOffsetWidth();
</script>
</body>
