1 files changed, 99 insertions, 0 deletions
diff --git a/dom/indexedDB/test/unit/test_traffic_jam.js b/dom/indexedDB/test/unit/test_traffic_jam.js
new file mode 100644
index 0000000000..6505b66964
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+++ b/dom/indexedDB/test/unit/test_traffic_jam.js
@@ -0,0 +1,99 @@
+/**
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+/* exported testGenerator */
+var testGenerator = testSteps();
+
+function* testSteps() {
+  const name = this.window ? window.location.pathname : "Splendid Test";
+
+  let requests = [];
+  function doOpen(
+    version,
+    errorCallback,
+    upgradeNeededCallback,
+    successCallback
+  ) {
+    let request = indexedDB.open(name, version);
+    request.onerror = errorCallback;
+    request.onupgradeneeded = upgradeNeededCallback;
+    request.onsuccess = successCallback;
+    requests.push(request);
+  }
+
+  doOpen(
+    1,
+    errorHandler,
+    grabEventAndContinueHandler,
+    grabEventAndContinueHandler
+  );
+  doOpen(2, errorHandler, unexpectedSuccessHandler, unexpectedSuccessHandler);
+
+  let event = yield undefined;
+  is(event.type, "upgradeneeded", "expect an upgradeneeded event");
+  is(event.target, requests[0], "fired at the right request");
+
+  let db = event.target.result;
+  db.createObjectStore("foo");
+
+  doOpen(3, errorHandler, unexpectedSuccessHandler, unexpectedSuccessHandler);
+  doOpen(2, errorHandler, unexpectedSuccessHandler, unexpectedSuccessHandler);
+  doOpen(3, errorHandler, unexpectedSuccessHandler, unexpectedSuccessHandler);
+
+  event.target.transaction.oncomplete = grabEventAndContinueHandler;
+
+  event = yield undefined;
+  is(event.type, "complete", "expect a complete event");
+  is(
+    event.target,
+    requests[0].transaction,
+    "expect it to be fired at the transaction"
+  );
+
+  event = yield undefined;
+  is(event.type, "success", "expect a success event");
+  is(event.target, requests[0], "fired at the right request");
+  event.target.result.close();
+
+  requests[1].onupgradeneeded = grabEventAndContinueHandler;
+
+  event = yield undefined;
+  is(event.type, "upgradeneeded", "expect an upgradeneeded event");
+  is(event.target, requests[1], "fired at the right request");
+
+  requests[1].onsuccess = grabEventAndContinueHandler;
+
+  event = yield undefined;
+  is(event.type, "success", "expect a success event");
+  is(event.target, requests[1], "fired at the right request");
+  event.target.result.close();
+
+  requests[2].onupgradeneeded = grabEventAndContinueHandler;
+
+  event = yield undefined;
+  is(event.type, "upgradeneeded", "expect an upgradeneeded event");
+  is(event.target, requests[2], "fired at the right request");
+
+  requests[2].onsuccess = grabEventAndContinueHandler;
+
+  event = yield undefined;
+  is(event.type, "success", "expect a success event");
+  is(event.target, requests[2], "fired at the right request");
+  event.target.result.close();
+
+  requests[3].onerror = null;
+  requests[3].addEventListener("error", new ExpectError("VersionError", true));
+
+  event = yield undefined;
+
+  requests[4].onsuccess = grabEventAndContinueHandler;
+
+  event = yield undefined;
+  is(event.type, "success", "expect a success event");
+  is(event.target, requests[4], "fired at the right request");
+  event.target.result.close();
+
+  finishTest();
+}