1 files changed, 46 insertions, 0 deletions
diff --git a/testing/web-platform/tests/intersection-observer/client-rect.html b/testing/web-platform/tests/intersection-observer/client-rect.html
new file mode 100644
index 0000000000..e85171ca7c
--- /dev/null
+++ b/testing/web-platform/tests/intersection-observer/client-rect.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<meta name="viewport" content="width=device-width,initial-scale=1">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="./resources/intersection-observer-test-utils.js"></script>
+
+<style>
+pre, #log {
+  position: absolute;
+  top: 0;
+  left: 200px;
+}
+iframe {
+  width: 180px;
+  height: 100px;
+}
+</style>
+
+<iframe id="iframe" srcdoc="<div id='target' style='margin:0.5px;width:1000px;height:1000px;'></div>"></iframe>
+
+<script>
+var target;
+var entries = [];
+var observer;
+var iframe = document.getElementById("iframe");
+
+iframe.onload = function() {
+  runTestCycle(function() {
+    target = iframe.contentDocument.getElementById("target");
+    assert_true(!!target, "Target element exists.");
+    observer = new IntersectionObserver(function(changes) {
+      entries = entries.concat(changes);
+    });
+    observer.observe(target);
+    entries = entries.concat(observer.takeRecords());
+    assert_equals(entries.length, 0, "No initial notifications.");
+    runTestCycle(test0, "First rAF should generate notification.");
+  }, "IntersectionObserverEntry.boundingClientRect should match target.boundingClientRect()");
+};
+
+function test0() {
+  assert_equals(entries.length, 1, "One notification.");
+  var bcr = target.getBoundingClientRect();
+  checkLastEntry(entries, 0, [bcr.left, bcr.right, bcr.top, bcr.bottom]);
+}
+</script>