1 files changed, 46 insertions, 0 deletions
diff --git a/testing/web-platform/tests/dom/nodes/Text-wholeText.html b/testing/web-platform/tests/dom/nodes/Text-wholeText.html
new file mode 100644
index 0000000000..2467930da8
--- /dev/null
+++ b/testing/web-platform/tests/dom/nodes/Text-wholeText.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Text - wholeText</title>
+<link rel=help href="https://dom.spec.whatwg.org/#dom-text-wholetext">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+"use strict";
+
+test(() => {
+  const parent = document.createElement("div");
+
+  const t1 = document.createTextNode("a");
+  const t2 = document.createTextNode("b");
+  const t3 = document.createTextNode("c");
+
+  assert_equals(t1.wholeText, t1.textContent);
+
+  parent.appendChild(t1);
+
+  assert_equals(t1.wholeText, t1.textContent);
+
+  parent.appendChild(t2);
+
+  assert_equals(t1.wholeText, t1.textContent + t2.textContent);
+  assert_equals(t2.wholeText, t1.textContent + t2.textContent);
+
+  parent.appendChild(t3);
+
+  assert_equals(t1.wholeText, t1.textContent + t2.textContent + t3.textContent);
+  assert_equals(t2.wholeText, t1.textContent + t2.textContent + t3.textContent);
+  assert_equals(t3.wholeText, t1.textContent + t2.textContent + t3.textContent);
+
+  const a = document.createElement("a");
+  a.textContent = "I'm an Anchor";
+  parent.insertBefore(a, t3);
+
+  const span = document.createElement("span");
+  span.textContent = "I'm a Span";
+  parent.appendChild(document.createElement("span"));
+
+  assert_equals(t1.wholeText, t1.textContent + t2.textContent);
+  assert_equals(t2.wholeText, t1.textContent + t2.textContent);
+  assert_equals(t3.wholeText, t3.textContent);
+}, "wholeText returns text of all Text nodes logically adjacent to the node, in document order.");
+</script>