1 files changed, 37 insertions, 0 deletions
diff --git a/testing/web-platform/tests/trusted-types/Element-insertAdjacentText.tentative.html b/testing/web-platform/tests/trusted-types/Element-insertAdjacentText.tentative.html
new file mode 100644
index 0000000000..f6221362c1
--- /dev/null
+++ b/testing/web-platform/tests/trusted-types/Element-insertAdjacentText.tentative.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="support/helper.sub.js"></script>
+<body>
+<div id="container"></div>
+<script>
+  var container = document.querySelector('#container');
+
+  test(t => {
+    let p = createHTML_policy(window, 1);
+    let html = p.createHTML(INPUTS.HTML);
+    let before = 'before';
+    let after = 'after';
+    let htmlBefore = p.createHTML(before);
+    let htmlAfter = p.createHTML(after);
+
+    var d = document.createElement('div');
+    container.appendChild(d);
+
+    d.insertAdjacentHTML('beforebegin', html);
+    assert_equals(d.previousSibling.nodeType, Node.TEXT_NODE);
+    assert_equals(d.previousSibling.data, RESULTS.HTML);
+
+    d.insertAdjacentHTML('afterbegin', htmlBefore);
+    d.insertAdjacentHTML('beforeend', htmlAfter);
+    assert_equals(d.innerHTML, before + after);
+
+    d.insertAdjacentHTML('afterend', html);
+    assert_equals(d.nextSibling.nodeType, Node.TEXT_NODE);
+    assert_equals(d.nextSibling.data, RESULTS.HTML);
+
+    while (container.firstChild)
+      container.firstChild.remove();
+  }, "insertAdjacentHTML with html assigned via policy (successful HTML transformation).");
+</script>
+