Bug 1768231 [wpt PR 33971] - WebKit export of https://bugs.webkit.org/show_bug.cgi?id=240083, a=testonly

Automatic update from web-platform-tests WebKit export of https://bugs.webkit.org/show_bug.cgi?id=240083 (#33971) Use correct document as root for lazy image observer -- wpt-commits: 8c4c2635c4816e02071ed7e594c71cb52a09f19d wpt-pr: 33971
2022-05-08 17:52:33 +00:00 · 2022-05-08 17:52:33 +00:00 · 788f7cd9ae
--- a/testing/web-platform/tests/html/semantics/embedded-content/the-img-element/scrolling-below-viewport-image-lazy-loading-in-iframe.html
+++ b/testing/web-platform/tests/html/semantics/embedded-content/the-img-element/scrolling-below-viewport-image-lazy-loading-in-iframe.html
@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<title>Scrolling a lazy loaded image into view in an iframe</title>
+<script src='/resources/testharness.js'></script>
+<script src='/resources/testharnessreport.js'></script>
+<iframe onload="async_test(this.contentWindow.run)" srcdoc="
+<!DOCTYPE html>
+<script src='/resources/testharness.js'></script>
+<script src='/resources/testharnessreport.js'></script>
+<script src='../resources/common.js'></script>
+
+<h1>Scroll down...</h1>
+<p>Scroll down...</p>
+<p>Scroll down...</p>
+<img id='below_iframe_viewport_img' src='resources/image.png' loading='lazy'
+   onload='below_iframe_viewport_img.resolve();' onerror='below_iframe_viewport_img.reject();'>
+
+<script>
+  const scroll_trigger_img = new ElementLoadPromise('visible');
+  const below_iframe_viewport_img = new ElementLoadPromise('below_iframe_viewport_img');
+
+  function run(t) {
+    below_iframe_viewport_img.element().scrollIntoView();
+    below_iframe_viewport_img.promise
+      .then(t.step_func(() => {
+        assert_not_equals(below_iframe_viewport_img.element().width, 0, 'width should be greater than zero after scrolling');
+        assert_not_equals(below_iframe_viewport_img.element().height, 0, 'height should be greater than zero after scrolling');
+        t.done();
+    }))
+    .catch(t.unreached_func('The below_iframe_viewport image should load'));
+  };
+</script>
+"></iframe>