summaryrefslogtreecommitdiffstats
path: root/testing/web-platform/tests/layout-instability/inline-flow-shift-vertical-rl.html
diff options
context:
space:
mode:
Diffstat (limited to 'testing/web-platform/tests/layout-instability/inline-flow-shift-vertical-rl.html')
-rw-r--r--testing/web-platform/tests/layout-instability/inline-flow-shift-vertical-rl.html44
1 files changed, 44 insertions, 0 deletions
diff --git a/testing/web-platform/tests/layout-instability/inline-flow-shift-vertical-rl.html b/testing/web-platform/tests/layout-instability/inline-flow-shift-vertical-rl.html
new file mode 100644
index 0000000000..848883755c
--- /dev/null
+++ b/testing/web-platform/tests/layout-instability/inline-flow-shift-vertical-rl.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<title>Layout Instability: vertical-rl inline/text movement is detected</title>
+<link rel="help" href="https://wicg.github.io/layout-instability/" />
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/util.js"></script>
+<body style="writing-mode: vertical-rl">
+<div style="height: 200px; font-size: 20px; line-height: 25px">
+ 1AAAAAAA<br>
+ 2AAAAAAA<br>
+ 3AAAAAAA<br>
+ <div id="inline-block" style="display: inline-block; width: 50px">4AAAAAAA</div><br>
+ 5AAAAAAA<br>
+ 6AAAAAAA<br>
+ 7AAAAAAA<br>
+</div>
+<script>
+
+promise_test(async () => {
+ const watcher = new ScoreWatcher;
+
+ // Wait for the initial render to complete.
+ await waitForAnimationFrames(2);
+
+ // Modify the position of the div.
+ const inline_block = document.querySelector("#inline-block");
+ inline_block.style.width = '100px';
+
+ // The lines below the inline-block are shifted down by 50px.
+ // The implementation may measure the real width of the shifted text
+ // or use the available width (i.e. width of the containing block).
+ // Also tolerate extra 10% error.
+ const text_width = inline_block.offsetWidth;
+ const expectedScoreMin = computeExpectedScore(text_width * (20 * 3 + 50), 50) * 0.9;
+ const expectedScoreMax = computeExpectedScore(200 * (25 * 3 + 50), 50) * 1.1;
+
+ // Observer fires after the frame is painted.
+ assert_equals(watcher.score, 0);
+ await watcher.promise;
+ assert_between_exclusive(watcher.score, expectedScoreMin, expectedScoreMax);
+}, 'Vertical-rl inline flow movement.');
+
+</script>
+</body>