1 files changed, 48 insertions, 0 deletions
diff --git a/testing/web-platform/tests/intersection-observer/target-in-detached-document.html b/testing/web-platform/tests/intersection-observer/target-in-detached-document.html
new file mode 100644
index 0000000000..6a5cf1e811
--- /dev/null
+++ b/testing/web-platform/tests/intersection-observer/target-in-detached-document.html
@@ -0,0 +1,48 @@
+<!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;
+}
+#target {
+  width: 100px;
+  height: 100px;
+  background-color: green;
+}
+</style>
+
+<script>
+var vw = document.documentElement.clientWidth;
+var vh = document.documentElement.clientHeight;
+
+var entries = [];
+var target;
+
+runTestCycle(function() {
+  var detached_document = document.implementation.createHTMLDocument("test");
+  target = detached_document.createElement("div");
+  target.id = "target";
+  var observer = new IntersectionObserver(function(changes) {
+    entries = entries.concat(changes)
+  });
+  observer.observe(target);
+  runTestCycle(step0, "First rAF.");
+}, "IntersectionObserver in a single document using the implicit root.");
+
+function step0() {
+  document.adoptNode(target);
+  document.body.appendChild(target);
+  checkLastEntry(entries, 0, [0, 0, 0, 0, 0, 0, 0, 0]);
+  runTestCycle(step1, "Adopt target.");
+}
+
+function step1() {
+  checkLastEntry(entries, 1, [8, 108, 8, 108, 8, 108, 8, 108, 0, vw, 0, vh, true]);
+}
+</script>