Test that lh units are calculated before select fixup

lilles · Chromium LUCI CQ · commit 1740fcbf0389 · 2022-10-14T16:56:49.000Z
Per resolution in [1], lh units should be computed before any fixups to line-height for form controls. Add a test for <select> elements. [1] w3c/csswg-drafts#3257 (comment) Bug: 937104 Change-Id: Id9987dc1d9a2c7b7a6e006cbfdd431e07379196b Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3955838 Commit-Queue: Rune Lillesveen <futhark@chromium.org> Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org> Cr-Commit-Position: refs/heads/main@{#1059314}
diff --git a/third_party/blink/web_tests/external/wpt/css/css-values/lh-unit-004.html b/third_party/blink/web_tests/external/wpt/css/css-values/lh-unit-004.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Values and Units Test: lh not affected by &lt;select&gt; fixup</title>
+<link rel="help" href="https://drafts.csswg.org/css-values-4/#font-relative-lengths">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>
+  select {
+    line-height: 100px;
+    width: 5lh;
+  }
+</style>
+<select id="lh"></select>
+<script>
+  test(() => {
+    assert_equals(getComputedStyle(lh).width, "500px");
+  }, "lh must be relative to computed line-height before select element fixup");
+</script>
