1 files changed, 93 insertions, 0 deletions
diff --git a/dom/workers/test/test_fileReadSlice.xhtml b/dom/workers/test/test_fileReadSlice.xhtml
new file mode 100644
index 0000000000..b035fa2872
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+++ b/dom/workers/test/test_fileReadSlice.xhtml
@@ -0,0 +1,93 @@
+<?xml version="1.0"?>
+<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
+<?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=664783
+-->
+<window title="Mozilla Bug 664783"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
+  <script type="application/javascript" src="dom_worker_helper.js"/>
+
+  <!-- test results are displayed in the html:body -->
+  <body xmlns="http://www.w3.org/1999/xhtml">
+  <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=664783"
+     target="_blank">Mozilla Bug 664783</a>
+
+  <div id="content" style="display: none">
+    <input id="fileList" type="file"></input>
+  </div>
+
+  </body>
+
+  <!-- test code goes here -->
+  <script type="application/javascript">
+  <![CDATA[
+
+  if (navigator.platform.startsWith("Win")) {
+    SimpleTest.expectAssertions(0, 1);
+  }
+
+  /** Test for Bug 664783 **/
+
+  var fileNum = 0;
+
+  /**
+   * Create a file which contains the given data.
+   */
+  function createFileWithData(fileData) {
+    var testFile = Cc["@mozilla.org/file/directory_service;1"]
+                       .getService(Ci.nsIProperties)
+                       .get("ProfD", Ci.nsIFile);
+    testFile.append("workerReadSlice" + fileNum++);
+
+    var outStream = Cc["@mozilla.org/network/file-output-stream;1"]
+                        .createInstance(Ci.nsIFileOutputStream);
+    outStream.init(testFile, 0x02 | 0x08 | 0x20, // write, create, truncate
+                   0o666, 0);
+    outStream.write(fileData, fileData.length);
+    outStream.close();
+
+    var fileList = document.getElementById('fileList');
+    fileList.value = testFile.path;
+
+    return fileList.files[0];
+  }
+
+  /**
+   * Creates a worker which slices a blob to the given start and end offset and
+   * reads the content as text.
+   */
+  function readSlice(blob, start, end, expectedText) {
+    var worker = new Worker("fileReadSlice_worker.js");
+
+    worker.onerror = function(event) {
+      ok(false, "Worker had an error: " + event.message);
+      finish();
+    };
+
+    worker.onmessage = function(event) {
+      is(event.data, expectedText, "Text from sliced blob in worker is incorrect.");
+      finish();
+    };
+
+    var params = {blob: blob, start: start, end: end};
+    worker.postMessage(params);
+    waitForWorkerFinish();
+  }
+
+  // Empty file.
+  readSlice(createFileWithData(""), 0, 0, "");
+
+  // Typical use case.
+  readSlice(createFileWithData("HelloBye"), 5, 8, "Bye");
+
+  // End offset too large.
+  readSlice(createFileWithData("HelloBye"), 5, 9, "Bye");
+
+  // Start of file.
+  readSlice(createFileWithData("HelloBye"), 0, 5, "Hello");
+
+  ]]>
+  </script>
+</window>