1 files changed, 125 insertions, 0 deletions
diff --git a/testing/web-platform/tests/trusted-types/Element-setAttribute-respects-Elements-node-documents-globals-CSP.html b/testing/web-platform/tests/trusted-types/Element-setAttribute-respects-Elements-node-documents-globals-CSP.html
new file mode 100644
index 0000000000..c0f72bb36a
--- /dev/null
+++ b/testing/web-platform/tests/trusted-types/Element-setAttribute-respects-Elements-node-documents-globals-CSP.html
@@ -0,0 +1,125 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <meta
+      http-equiv="Content-Security-Policy"
+      content="require-trusted-types-for 'script';"
+    />
+    <title>
+      trusted-types (TT): `setAttribute`/`setAttributeNode` for an element
+      adopted from a non-TT realm respects TT's Content-Security-Policy (CSP)
+    </title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+  </head>
+  <body>
+    <div id="nonSVGTestElements">
+      <iframe srcdoc="v"></iframe>
+      <embed src="v" />
+      <script src="v"></script>
+      <object data="v"></object>
+      <object codebase="v"></object>
+    </div>
+    <svg id="svgTestElements">
+      <script href="v"></script>
+      <script xlink:href="v"></script>
+    </svg>
+    <script>
+      const passThroughPolicy = trustedTypes.createPolicy("passThrough", {
+        createHTML: (s) => s,
+      });
+
+      function runTest(aTestElement) {
+        const testAttr = aTestElement.attributes[0];
+
+        async_test(
+          (t) => {
+            const sourceFrame = document.createElement("iframe");
+
+            // The markup requires the parent element to ensure the attribute is associated with the
+            // correct namespace.
+            sourceFrame.srcdoc = passThroughPolicy.createHTML(
+              `<!DOCTYPE html>
+            <head>
+            <meta charset="utf-8">
+            </head>
+            <body>
+                <` +
+                aTestElement.parentElement.localName +
+                `>
+                    <` +
+                aTestElement.localName +
+                ` ` +
+                testAttr.name +
+                `="` +
+                testAttr.value +
+                `">
+                    </` +
+                aTestElement.localName +
+                `>
+                </` +
+                aTestElement.parentElement.localName +
+                `>
+            doc without TT CSP.
+            </body>`
+            );
+
+            t.add_cleanup(() => {
+              sourceFrame.remove();
+            });
+
+            sourceFrame.addEventListener(
+              "load",
+              t.step_func_done(() => {
+                // A window is a global object which has 1-to-1 mapping to a realm, see the first
+                // note of <https://html.spec.whatwg.org/#realms-settings-objects-global-objects>
+                // and its following paragraph. Here, `sourceElement`'s node document's global
+                // belongs to a non-TT realm.
+
+                const sourceElement =
+                  sourceFrame.contentDocument.body.querySelector(
+                    aTestElement.localName
+                  );
+                const sourceAttr = sourceElement.getAttributeNode(
+                  testAttr.name
+                );
+                sourceElement.removeAttributeNode(sourceAttr);
+
+                document.body.append(sourceElement);
+                // Now `sourceElement`'s node document's global belongs to a TT-realm.
+
+                assert_throws_js(sourceFrame.contentWindow.TypeError, () => {
+                  sourceElement.setAttributeNode(sourceAttr);
+                });
+                assert_throws_js(sourceFrame.contentWindow.TypeError, () => {
+                  sourceElement.setAttributeNS(
+                    sourceAttr.namespaceURI,
+                    sourceAttr.name,
+                    sourceAttr.value
+                  );
+                });
+              })
+            );
+
+            document.body.append(sourceFrame);
+          },
+          `setAttribute and setAttributeNode respect the element's node document's global's CSP;
+ Element=${aTestElement.localName}; Parent=${aTestElement.parentElement.localName}; Attribute=${testAttr.name}`
+        );
+      }
+
+      for (const testElement of document.querySelectorAll(
+        "#nonSVGTestElements *"
+      )) {
+        runTest(testElement);
+      }
+
+      for (const testElement of document.querySelectorAll(
+        "#svgTestElements *"
+      )) {
+        runTest(testElement);
+      }
+    </script>
+  </body>
+</html>