1 files changed, 30 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/cross-origin-embedder-policy/resources/script-factory.js b/testing/web-platform/tests/html/cross-origin-embedder-policy/resources/script-factory.js
new file mode 100644
index 0000000000..ac7a1fda06
--- /dev/null
+++ b/testing/web-platform/tests/html/cross-origin-embedder-policy/resources/script-factory.js
@@ -0,0 +1,30 @@
+// This creates a serialized <script> element that is useful for blob/data/srcdoc-style tests.
+
+function createScript(sameOrigin, crossOrigin, type="parent", id="") {
+  return `const data = { id: "${id}",
+               opener: !!window.opener,
+               origin: window.origin,
+               sameOriginNoCORPSuccess: false,
+               crossOriginNoCORPFailure: false };
+function record(promise, token, expectation) {
+  return promise.then(() => data[token] = expectation, () => data[token] = !expectation);
+}
+
+const records = [
+  record(fetch("${crossOrigin}/common/blank.html", { mode: "no-cors" }), "crossOriginNoCORPFailure", false)
+];
+
+if ("${sameOrigin}" !== "null") {
+  records.push(record(fetch("${sameOrigin}/common/blank.html", { mode: "no-cors" }), "sameOriginNoCORPSuccess", true));
+}
+
+Promise.all(records).then(() => {
+  // Using BroadcastChannel is useful for blob: URLs, which are always same-origin
+  if ("${type}" === "channel") {
+    const bc = new BroadcastChannel("${id}");
+    bc.postMessage(data);
+  } else {
+    window.${type}.postMessage(data, "*");
+  }
+});`;
+}