1 files changed, 45 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/webappapis/structured-clone/structured-clone-battery-of-tests-harness.js b/testing/web-platform/tests/html/webappapis/structured-clone/structured-clone-battery-of-tests-harness.js
new file mode 100644
index 0000000000..00a86fa74b
--- /dev/null
+++ b/testing/web-platform/tests/html/webappapis/structured-clone/structured-clone-battery-of-tests-harness.js
@@ -0,0 +1,45 @@
+/**
+ * Runs a collection of tests that determine if an API implements structured clone
+ * correctly.
+ *
+ * The `runner` parameter has the following properties:
+ * - `setup()`: An optional function run once before testing starts
+ * - `teardown()`: An option function run once after all tests are done
+ * - `preTest()`: An optional, async function run before a test
+ * - `postTest()`: An optional, async function run after a test is done
+ * - `structuredClone(obj, transferList)`: Required function that somehow
+ *                                         structurally clones an object.
+ *                                         Must return a promise.
+ * - `hasDocument`: When true, disables tests that require a document. True by default.
+ */
+
+function runStructuredCloneBatteryOfTests(runner) {
+  const defaultRunner = {
+    setup() {},
+    preTest() {},
+    postTest() {},
+    teardown() {},
+    hasDocument: true
+  };
+  runner = Object.assign({}, defaultRunner, runner);
+
+  let setupPromise = runner.setup();
+  const allTests = structuredCloneBatteryOfTests.map(test => {
+
+    if (!runner.hasDocument && test.requiresDocument) {
+      return;
+    }
+
+    return new Promise(resolve => {
+      promise_test(async t => {
+        test = await test;
+        await setupPromise;
+        await runner.preTest(test);
+        await test.f(runner, t)
+        await runner.postTest(test);
+        resolve();
+      }, test.description);
+    }).catch(_ => {});
+  });
+  Promise.all(allTests).then(_ => runner.teardown());
+}