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+<!--
+  Any copyright is dedicated to the Public Domain.
+  http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<html>
+<head>
+  <title>File Handle Test</title>
+
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+
+  <script type="text/javascript">
+  function* testSteps()
+  {
+    const name = window.location.pathname;
+
+    let request = indexedDB.open(name, 1);
+    request.onerror = errorHandler;
+    request.onsuccess = grabEventAndContinueHandler;
+    let event = yield undefined;
+
+    let db = event.target.result;
+    db.onerror = errorHandler;
+
+    request = db.createMutableFile("test.txt");
+    request.onerror = errorHandler;
+    request.onsuccess = grabEventAndContinueHandler;
+    event = yield undefined;
+
+    let mutableFile = event.target.result;
+    mutableFile.onerror = errorHandler;
+
+    for (let i = 0; i < 50; i++) {
+      let stepNumber = 0;
+
+      request = mutableFile.open("readwrite").append("string1");
+      request.onsuccess = function(event) {
+        is(stepNumber, 1, "This callback came first");
+        stepNumber++;
+        event.target.fileHandle.oncomplete = grabEventAndContinueHandler;
+      };
+
+      request = mutableFile.open("readwrite").append("string2");
+      request.onsuccess = function(event) {
+        is(stepNumber, 2, "This callback came second");
+        stepNumber++;
+        event.target.fileHandle.oncomplete = grabEventAndContinueHandler;
+      };
+
+      request = mutableFile.open("readwrite").append("string3");
+      request.onsuccess = function(event) {
+        is(stepNumber, 3, "This callback came third");
+        stepNumber++;
+        event.target.fileHandle.oncomplete = grabEventAndContinueHandler;
+      };
+
+      stepNumber++;
+      yield undefined; yield undefined; yield undefined;
+
+      is(stepNumber, 4, "All callbacks received");
+    }
+
+    finishTest();
+  }
+  </script>
+  <script type="text/javascript" src="helpers.js"></script>
+
+</head>
+
+<body onload="runTest();"></body>
+
+</html>