1 files changed, 54 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webstorage/eventTestHarness.js b/testing/web-platform/tests/webstorage/eventTestHarness.js
new file mode 100644
index 0000000000..0a98546ace
--- /dev/null
+++ b/testing/web-platform/tests/webstorage/eventTestHarness.js
@@ -0,0 +1,54 @@
+storageEventList = [];
+iframe = document.createElement("IFRAME");
+document.body.appendChild(iframe);
+
+function runAfterNStorageEvents(callback, expectedNumEvents)
+{
+    countStorageEvents(callback, expectedNumEvents, 0)
+}
+
+function countStorageEvents(callback, expectedNumEvents, times)
+{
+    function onTimeout()
+    {
+        var currentCount = storageEventList.length;
+        if (currentCount == expectedNumEvents) {
+            callback();
+        } else if (currentCount > expectedNumEvents) {
+            msg = "got at least " + currentCount + ", expected only " + expectedNumEvents + " events";
+            callback(msg);
+        } else if (times > 50) {
+            msg = "Timeout: only got " + currentCount + ", expected " + expectedNumEvents + " events";
+            callback(msg);
+        } else {
+            countStorageEvents(callback, expectedNumEvents, times+1);
+        }
+    }
+    setTimeout(onTimeout, 20);
+}
+
+function clearStorage(storageName, callback)
+{
+    if (window[storageName].length === 0) {
+        storageEventList = [];
+        setTimeout(callback, 0);
+    } else {
+        window[storageName].clear();
+        runAfterNStorageEvents(function() {
+            storageEventList = [];
+            callback();
+        }, 1);
+    }
+}
+
+function testStorages(testCallback)
+{
+    testCallback("sessionStorage");
+    var hit = false;
+    add_result_callback(function() {
+        if (!hit) {
+            hit = true;
+            testCallback("localStorage");
+        }
+    });
+}