content/base/test/test_fileapi.html

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<head>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=414796
-->
  <title>Test for Bug 414796</title>
  <script type="text/javascript" src="/MochiKit/packed.js"></script>
  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
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<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=414796">Mozilla Bug 414796</a>
<p id="display">
  <input id="fileList" type="file"></input>
</p>
<div id="content" style="display: none">
</div>

<pre id="test">
<script class="testbody" type="text/javascript">
const minFileSize = 20000;
var fileNum = 1;
var testRanCounter = 0;
var expectedTestCount = 0;
SimpleTest.waitForExplicitFinish();
netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");

is(FileReader.EMPTY, 0, "correct EMPTY value");
is(FileReader.LOADING, 1, "correct LOADING value");
is(FileReader.DONE, 2, "correct DONE value");

// Create strings containing data we'll test with. We'll want long
// strings to ensure they span multiple buffers while loading
var testTextData = "asd b\tlah\u1234w\u00a0r";
while (testTextData.length < minFileSize) {
  testTextData = testTextData + testTextData;
}

var testASCIIData = "abcdef 123456\n";
while (testASCIIData.length < minFileSize) {
  testASCIIData = testASCIIData + testASCIIData;
}

var testBinaryData = "";
for (var i = 0; i < 256; i++) {
  testBinaryData += String.fromCharCode(i);
}
while (testBinaryData.length < minFileSize) {
  testBinaryData = testBinaryData + testBinaryData;
}


//Set up files for testing
var asciiFile = createFileWithData(testASCIIData);
var binaryFile = createFileWithData(testBinaryData);

var fileList = document.getElementById('fileList');
fileList.value = "/none/existing/path/fileAPI/testing";
var nonExistingFile = fileList.files[0];

// Test that plain reading works and fires events as expected, both
// for text and binary reading

var onloadHasRunText = false;
var onloadStartHasRunText = false;
r = new FileReader();
is(r.readyState, FileReader.EMPTY, "correct initial text readyState");
r.onload = getLoadHandler(testASCIIData, testASCIIData.length, "plain reading");
r.addEventListener("load", function() { onloadHasRunText = true }, false);
r.addEventListener("loadstart", function() { onloadStartHasRunText = true }, false);
r.readAsText(asciiFile);
is(r.readyState, FileReader.LOADING, "correct loading text readyState");
is(onloadHasRunText, false, "text loading must be async");
is(onloadStartHasRunText, true, "text loadstart should fire sync");
expectedTestCount++;

var onloadHasRunBinary = false;
var onloadStartHasRunBinary = false;
r = new FileReader();
is(r.readyState, FileReader.EMPTY, "correct initial binary readyState");
r.addEventListener("load", function() { onloadHasRunBinary = true }, false);
r.addEventListener("loadstart", function() { onloadStartHasRunBinary = true }, false);
r.readAsBinaryString(binaryFile);
r.onload = getLoadHandler(testBinaryData, testBinaryData.length, "binary reading");
is(r.readyState, FileReader.LOADING, "correct loading binary readyState");
is(onloadHasRunBinary, false, "binary loading must be async");
is(onloadStartHasRunBinary, true, "binary loadstart should fire sync");
expectedTestCount++;


// Test a variety of encodings, and make sure they work properly
r = new FileReader();
r.onload = getLoadHandler(testASCIIData, testASCIIData.length, "no encoding reading");
r.readAsText(asciiFile, "");
expectedTestCount++;

r = new FileReader();
r.onload = getLoadHandler(testASCIIData, testASCIIData.length, "iso8859 reading");
r.readAsText(asciiFile, "iso-8859-1");
expectedTestCount++;

r = new FileReader();
r.onload = getLoadHandler(testTextData,
                          convertToUTF8(testTextData).length,
                          "utf8 reading");
r.readAsText(createFileWithData(convertToUTF8(testTextData)), "utf8");
expectedTestCount++;

r = new FileReader();
r.readAsText(createFileWithData(convertToUTF16(testTextData)), "utf-16");
r.onload = getLoadHandler(testTextData,
                          convertToUTF16(testTextData).length,
                          "utf16 reading");
expectedTestCount++;


// Test loading an empty file works (and doesn't crash!)
var emptyFile = createFileWithData("");
dump("hello nurse");
r = new FileReader();
r.onload = getLoadHandler("", 0, "empty no encoding reading");
r.readAsText(emptyFile, "");
expectedTestCount++;

r = new FileReader();
r.onload = getLoadHandler("", 0, "empty utf8 reading");
r.readAsText(emptyFile, "utf8");
expectedTestCount++;

r = new FileReader();
r.onload = getLoadHandler("", 0, "empty utf16 reading");
r.readAsText(emptyFile, "utf-16");
expectedTestCount++;

r = new FileReader();
r.onload = getLoadHandler("", 0, "empty binary string reading");
r.readAsBinaryString(emptyFile);
expectedTestCount++;

r = new FileReader();
r.onload = getLoadHandler(convertToDataURL(""), 0, "empt binary string reading");
r.readAsDataURL(emptyFile);
expectedTestCount++;


// Test reusing a FileReader to read multiple times
r = new FileReader();
r.onload = getLoadHandler(testASCIIData,
                          testASCIIData.length,
                          "to-be-reused reading text")
var makeAnotherReadListener = function(event) {
  r = event.target;
  r.removeEventListener("load", makeAnotherReadListener, false);
  r.onload = getLoadHandler(testASCIIData,
                            testASCIIData.length,
                            "reused reading text");
  r.readAsText(asciiFile);
};
r.addEventListener("load", makeAnotherReadListener, false);
r.readAsText(asciiFile);
expectedTestCount += 2;

r = new FileReader();
r.onload = getLoadHandler(testBinaryData,
                          testBinaryData.length,
                          "to-be-reused reading binary")
var makeAnotherReadListener2 = function(event) {
  r = event.target;
  r.removeEventListener("load", makeAnotherReadListener2, false);
  r.onload = getLoadHandler(testBinaryData,
                            testBinaryData.length,
                            "reused reading binary");
  r.readAsBinaryString(binaryFile);
};
r.addEventListener("load", makeAnotherReadListener2, false);
r.readAsBinaryString(binaryFile);
expectedTestCount += 2;

r = new FileReader();
r.onload = getLoadHandler(convertToDataURL(testBinaryData),
                          testBinaryData.length,
                          "to-be-reused reading data url")
var makeAnotherReadListener3 = function(event) {
  r = event.target;
  r.removeEventListener("load", makeAnotherReadListener3, false);
  r.onload = getLoadHandler(convertToDataURL(testBinaryData),
                            testBinaryData.length,
                            "reused reading data url");
  r.readAsDataURL(binaryFile);
};
r.addEventListener("load", makeAnotherReadListener3, false);
r.readAsDataURL(binaryFile);
expectedTestCount += 2;


//Test data-URI encoding on differing file sizes
dataurldata = testBinaryData.substr(0, testBinaryData.length -
                                       testBinaryData.length % 3);
is(dataurldata.length % 3, 0, "Want to test data with length % 3 == 0");
r = new FileReader();
r.onload = getLoadHandler(convertToDataURL(dataurldata),
                          dataurldata.length,
                          "dataurl reading, %3 = 0");
r.readAsDataURL(createFileWithData(dataurldata));
expectedTestCount++;

dataurldata = testBinaryData.substr(0, testBinaryData.length - 2 -
                                       testBinaryData.length % 3);
is(dataurldata.length % 3, 1, "Want to test data with length % 3 == 1");
r = new FileReader();
r.onload = getLoadHandler(convertToDataURL(dataurldata),
                          dataurldata.length,
                          "dataurl reading, %3 = 1");
r.readAsDataURL(createFileWithData(dataurldata));
expectedTestCount++;

dataurldata = testBinaryData.substr(0, testBinaryData.length - 1 -
                                       testBinaryData.length % 3);
is(dataurldata.length % 3, 2, "Want to test data with length % 3 == 2");
r = new FileReader();
r.onload = getLoadHandler(convertToDataURL(dataurldata),
                          dataurldata.length,
                          "dataurl reading, %3 = 2");
r.readAsDataURL(createFileWithData(dataurldata));
expectedTestCount++;


// Test abort()
var abortHasRun = false;
var loadEndHasRun = false;
r = new FileReader();
r.onabort = function (event) {
  is(abortHasRun, false, "abort should only fire once");
  is(loadEndHasRun, false, "loadend shouldn't have fired yet");
  abortHasRun = true;
  is(event.target.readyState, FileReader.DONE, "should be DONE while firing onabort");
  is(event.target.error.code, FileError.ABORT_ERR, "error code set to ABORT for aborted reads");
  is(event.target.result, null, "file data should be null on aborted reads");
}
r.onloadend = function (event) {
  is(abortHasRun, true, "abort should fire before loadend");
  is(loadEndHasRun, false, "loadend should only fire once");
  loadEndHasRun = true;
  is(event.target.readyState, FileReader.DONE, "should be DONE while firing onabort");
  is(event.target.error.code, FileError.ABORT_ERR, "error code set to ABORT for aborted reads");
  is(event.target.result, null, "file data should be null on aborted reads");
}
r.onload = function() { ok(false, "load should not fire for aborted reads") };
r.onerror = function() { ok(false, "error should not fire for aborted reads") };
r.onprogress = function() { ok(false, "progress should not fire for aborted reads") };
r.abort();
is(abortHasRun, false, "abort() is a no-op unless loading");
r.readAsText(asciiFile);
r.abort();
is(abortHasRun, true, "abort should fire sync");
is(loadEndHasRun, true, "loadend should fire sync");

// Test calling readAsX to cause abort()
var reuseAbortHasRun = false;
r = new FileReader();
r.onabort = function (event) {
  is(reuseAbortHasRun, false, "abort should only fire once");
  reuseAbortHasRun = true;
  is(event.target.readyState, FileReader.DONE, "should be DONE while firing onabort");
  is(event.target.error.code, FileError.ABORT_ERR, "error code set to ABORT for aborted reads");
  is(event.target.result, null, "file data should be null on aborted reads");
}
r.onload = function() { ok(false, "load should not fire for aborted reads") };
r.abort();
is(reuseAbortHasRun, false, "abort() is a no-op unless loading");
r.readAsText(asciiFile);
r.readAsText(asciiFile);
is(reuseAbortHasRun, true, "abort should fire sync");
r.onload = getLoadHandler(testASCIIData, testASCIIData.length, "reuse-as-abort reading");
expectedTestCount++;


// Test reading from nonexistent files
r = new FileReader();
var didThrow = false;
try {
  r.readAsDataURL(nonExistingFile);
} catch(ex) {
  didThrow = true;
}
// Once this test passes, we should test that onerror gets called and
// that the FileReader object is in the right state during that call.
todo(!didThrow, "shouldn't throw when opening nonexistent file, should fire error instead");


function getLoadHandler(expectedResult, expectedLength, testName) {
  return function (event) {
    is(event.target.readyState, FileReader.DONE,
       "readyState in test " + testName);
    is(event.target.error, null,
       "no error in test " + testName);
    is(event.target.result, expectedResult,
       "result in test " + testName);
    is(event.lengthComputable, true,
       "lengthComputable in test " + testName);
    is(event.loaded, expectedLength,
       "lengthComputable in test " + testName);
    is(event.total, expectedLength,
       "lengthComputable in test " + testName);
    testHasRun();
  }
}

function testHasRun() {
 //alert(testRanCounter);
 ++testRanCounter;
 if (testRanCounter == expectedTestCount) {
    is(onloadHasRunText, true, "onload text should have fired by now"); 
    is(onloadHasRunBinary, true, "onload binary should have fired by now"); 
    SimpleTest.finish();
  }
}

function createFileWithData(fileData) {
  var dirSvc = Components.classes["@mozilla.org/file/directory_service;1"].getService(Components.interfaces.nsIProperties);
  var testFile = dirSvc.get("ProfD", Components.interfaces.nsIFile);
  testFile.append("fileAPItestfile" + fileNum);
  fileNum++;
  var outStream = Components.classes["@mozilla.org/network/file-output-stream;1"].createInstance(Components.interfaces.nsIFileOutputStream);
  outStream.init(testFile, 0x02 | 0x08 | 0x20, // write, create, truncate
                 0666, 0);
  outStream.write(fileData, fileData.length);
  outStream.close();

  var fileList = document.getElementById('fileList');
  fileList.value = testFile.path;

  return fileList.files[0];
}

function convertToUTF16(s) {
  res = "";
  for (var i = 0; i < s.length; ++i) {
    c = s.charCodeAt(i);
    res += String.fromCharCode(c >>> 8, c & 255);
  }
  return res;
}

function convertToUTF8(s) {
  return unescape(encodeURIComponent(s));
}

function convertToDataURL(s) {
  return "data:application/octet-stream;base64," + btoa(s);
}

</script>
</pre>
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