<!DOCTYPE HTML> <html> <head> <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=1198095 --> <title>Test for Bug 1198095</title> <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> </head> <body> <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;version=1.7"> 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"); ok(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> </body> </html>