test_bug1198095.html

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<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=1198095

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  <title>Test for Bug 1198095</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1198095">Mozilla Bug 1198095</a>

<pre id="test">

<script class="testbody" type="text/javascript">

var fileData1 = '1234567890';

var fileData2 = '43210';

var r, firstBlob;

var openerURL = SimpleTest.getTestFileURL("file_bug1198095.js");

var opener = SpecialPowers.loadChromeScript(openerURL);

opener.addMessageListener("file.opened", onFileOpened);

opener.addMessageListener("file.modified", onFileModified);

opener.sendAsyncMessage("file.open", fileData1);

function onLoadEnd1(e) {

  e.target.removeEventListener('loadend', onLoadEnd1);

  is(e.target, r, "Target and r are ok");

  is(e.target.readyState, FileReader.DONE, "The file has been read.");

  ok(e.target.result instanceof ArrayBuffer, "The result is an ArrayBuffer");

  var view = new Uint8Array(e.target.result);

  is(view.length, fileData1.length, "File data length matches");

  for (var i = 0; i < fileData1.length; ++i) {

    is(String.fromCharCode(view[i]), fileData1[i], "Byte matches");

  opener.sendAsyncMessage("file.modify", fileData2);

function onError1(e) {

  ok(false, "This method should not be called - error1!");

function onError2(e) {

  e.target.removeEventListener('error', onError2);

  SimpleTest.finish();

function onFileOpened(blob) {

  firstBlob = blob;

  r = new FileReader();

  r.addEventListener("loadend", onLoadEnd1);

  r.addEventListener("error", onError1);

  r.readAsArrayBuffer(firstBlob);

function onFileModified(blob) {

  r.removeEventListener('error', onError1);

  r.addEventListener("error", onError2);

  r.readAsArrayBuffer(firstBlob);

SimpleTest.waitForExplicitFinish();

</script>

</pre>

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