1 files changed, 49 insertions, 0 deletions
diff --git a/testing/web-platform/tests/cookies/resources/testharness-helpers.js b/testing/web-platform/tests/cookies/resources/testharness-helpers.js
new file mode 100644
index 000000000..84368d6d9
--- /dev/null
+++ b/testing/web-platform/tests/cookies/resources/testharness-helpers.js
@@ -0,0 +1,49 @@
+// Given an array of potentially asynchronous tests, this function will execute
+// each in serial, ensuring that one and only one test is executing at a time.
+//
+// The test array should look like this:
+//
+//
+//     var tests = [
+//       [
+//         "Test description goes here.",
+//         function () {
+//           // Test code goes here. `this` is bound to the test object.
+//         }
+//       ],
+//       ...
+//     ];
+//
+// The |setup| and |teardown| arguments are functions which are executed before
+// and after each test, respectively.
+function executeTestsSerially(testList, setup, teardown) {
+  var tests = testList.map(function (t) {
+    return {
+      test: async_test(t[0]),
+      code: t[1]
+    };
+  });
+
+  var executeNextTest = function () {
+    var current = tests.shift();
+    if (current === undefined) {
+      return;
+    }
+
+    // Setup the test fixtures.
+    if (setup) {
+      setup();
+    }
+
+    // Bind a callback to tear down the test fixtures.
+    if (teardown) {
+      current.test.add_cleanup(teardown);
+    }
+
+    // Execute the test.
+    current.test.step(current.code);
+  };
+
+  add_result_callback(function () { setTimeout(executeNextTest, 0) });
+  executeNextTest();
+}