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gecko-dev/content/base/test/test_fileapi_slice.html

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Bug 575946: Implement File.slice. r=khuey sr=biesi a=beltzner
2010-10-13 23:25:33 +00:00
<!DOCTYPE HTML>
<html>
<head>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=575946
-->
<title>Test for Bug 575946</title>
<script type="text/javascript" src="/MochiKit/packed.js"></script>
<script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
Bug 648997: Implement BlobBuilder spec as MozBlobBuilder. r=sicking. Note that there is one key difference between this implementation and the spec. In this patch MozBlobBuilder.getBlob("content/type"); returns a Blob and clears the MozBlobBuilder. In the spec the BlobBuilder is not cleared. Thus, let bb = new MozBlobBuilder(); MozBlobBuilder.append("foo"); let blob1 = MozBlobBuilder.getBlob("content/type"); // blob1 contains "foo" MozBlobBuilder.append("bar"); let blob2 = MozBlobBuilder.getBlob("content/type"); // blob2 contains "bar", the spec says it should contain "foobar". IMO, the spec behavior optimizes for the wrong case. BlobBuilder will probably be used mostly as a one-shot API. Additionally, the spec requires the BlobBuilder to hang on to potentially large amounts of memory between the getBlob() call and when the BlobBuilder is GCd. These issues have been raised on the listserv.
2011-05-20 17:18:45 +00:00
<script type="text/javascript" src="fileutils.js"></script>
Bug 575946: Implement File.slice. r=khuey sr=biesi a=beltzner
2010-10-13 23:25:33 +00:00
<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=575946">Mozilla Bug 575946</a>
<p id="display">
<canvas id=canvas width=1000 height=1000 hidden></canvas>
<canvas id=testcanvas hidden></canvas>
<input id="fileList" type="file"></input>
</p>
<div id="content" style="display: none">
</div>
<pre id="test">
<script class="testbody" type="text/javascript">
var fileNum = 1;
SimpleTest.waitForExplicitFinish();
// Create files containing data we'll test with. We'll want long
// strings to ensure they span multiple buffers while loading
// Create a decent-sized image
cx = $("canvas").getContext('2d');
var s = cx.canvas.width;
var grad = cx.createLinearGradient(0, 0, s-1, s-1);
for (i = 0; i < 0.95; i += .1) {
grad.addColorStop(i, "white");
grad.addColorStop(i + .05, "black");
}
grad.addColorStop(1, "white");
cx.fillStyle = grad;
cx.fillRect(0, 0, s-1, s-1);
cx.fillStyle = "rgba(200, 0, 0, 0.9)";
cx.fillRect(.1 * s, .1 * s, .7 * s, .7 * s);
cx.strokeStyle = "rgba(0, 0, 130, 0.5)";
cx.lineWidth = .14 * s;
cx.beginPath();
cx.arc(.6 * s, .6 * s, .3 * s, 0, Math.PI*2, true);
cx.stroke();
cx.closePath();
cx.fillStyle = "rgb(0, 255, 0)";
cx.beginPath();
cx.arc(.1 * s, .8 * s, .1 * s, 0, Math.PI*2, true);
cx.fill();
cx.closePath();
var fileData =
atob(cx.canvas.toDataURL("image/png").substring("data:text/png;base64,".length + 1));
var memFile = cx.canvas.mozGetAsFile("image/png");
var fileFile = createFileWithData(fileData);
var size = fileData.length;
// This might fail if we dramatically improve the png encoder. If that happens
// please increase the complexity or size of the image generated above to ensure
// that we're testing with files that are large enough.
ok(size > 65536, "test data sufficiently large");
// Test that basic properties work
Bug 648997: Implement BlobBuilder spec as MozBlobBuilder. r=sicking. Note that there is one key difference between this implementation and the spec. In this patch MozBlobBuilder.getBlob("content/type"); returns a Blob and clears the MozBlobBuilder. In the spec the BlobBuilder is not cleared. Thus, let bb = new MozBlobBuilder(); MozBlobBuilder.append("foo"); let blob1 = MozBlobBuilder.getBlob("content/type"); // blob1 contains "foo" MozBlobBuilder.append("bar"); let blob2 = MozBlobBuilder.getBlob("content/type"); // blob2 contains "bar", the spec says it should contain "foobar". IMO, the spec behavior optimizes for the wrong case. BlobBuilder will probably be used mostly as a one-shot API. Additionally, the spec requires the BlobBuilder to hang on to potentially large amounts of memory between the getBlob() call and when the BlobBuilder is GCd. These issues have been raised on the listserv.
2011-05-20 17:18:45 +00:00
testSlice(memFile, size, "image/png", fileData, "memFile");
testSlice(fileFile, size, "", fileData, "fileFile");
Bug 575946: Implement File.slice. r=khuey sr=biesi a=beltzner
2010-10-13 23:25:33 +00:00
// Try loading directly from slice into an image
var testBinaryData = "";
for (var i = 0; i < 256; i++) {
testBinaryData += String.fromCharCode(i);
}
while (testBinaryData.length < 20000) {
testBinaryData += testBinaryData;
}
function imageLoadHandler(event) {
var origcanvas = $("canvas");
var testcanvas = $("testcanvas");
var image = event.target;
is(image.naturalWidth, origcanvas.width, "width correct");
is(image.naturalHeight, origcanvas.height, "height correct");
testcanvas.width = origcanvas.width;
testcanvas.height = origcanvas.height;
testcanvas.getContext("2d").drawImage(image, 0, 0);
Bug 621414 - mochitests-1: test_fileapi_slice.html logs 12 _very_ (too) long lines; (Av1a) Better differentiate check logs, Stop generating raw-binary and/or over-long log lines. rs=jonas a=(test only).
2011-01-05 11:35:55 +00:00
// Do not use |is(testcanvas.toDataURL("image/png"), origcanvas.toDataURL("image/png"), "...");| that results in a _very_ long line.
var origDataURL = origcanvas.toDataURL("image/png");
var testDataURL = testcanvas.toDataURL("image/png");
is(testDataURL.length, origDataURL.length,
"Length of correct image data");
ok(testDataURL == origDataURL,
"Content of correct image data");
Bug 575946: Implement File.slice. r=khuey sr=biesi a=beltzner
2010-10-13 23:25:33 +00:00
testHasRun();
}
// image in the middle
var imgfile = createFileWithData(testBinaryData + fileData + testBinaryData);
Bug 621414 - mochitests-1: test_fileapi_slice.html logs 12 _very_ (too) long lines; (Av1a) Better differentiate check logs, Stop generating raw-binary and/or over-long log lines. rs=jonas a=(test only).
2011-01-05 11:35:55 +00:00
is(imgfile.size, size + testBinaryData.length * 2, "correct file size (middle)");
Bug 575946: Implement File.slice. r=khuey sr=biesi a=beltzner
2010-10-13 23:25:33 +00:00
var img = new Image;
Bug 649672: Make File.slice arguments match Array.slice and prefix File.slice. r=khuey
2011-04-13 21:34:36 +00:00
img.src = URL.createObjectURL(imgfile.mozSlice(testBinaryData.length, testBinaryData.length + size));
Bug 575946: Implement File.slice. r=khuey sr=biesi a=beltzner
2010-10-13 23:25:33 +00:00
img.onload = imageLoadHandler;
expectedTestCount++;
// image at start
var imgfile = createFileWithData(fileData + testBinaryData);
Bug 621414 - mochitests-1: test_fileapi_slice.html logs 12 _very_ (too) long lines; (Av1a) Better differentiate check logs, Stop generating raw-binary and/or over-long log lines. rs=jonas a=(test only).
2011-01-05 11:35:55 +00:00
is(imgfile.size, size + testBinaryData.length, "correct file size (start)");
Bug 575946: Implement File.slice. r=khuey sr=biesi a=beltzner
2010-10-13 23:25:33 +00:00
var img = new Image;
Bug 649672: Make File.slice arguments match Array.slice and prefix File.slice. r=khuey
2011-04-13 21:34:36 +00:00
img.src = URL.createObjectURL(imgfile.mozSlice(0, size));
Bug 575946: Implement File.slice. r=khuey sr=biesi a=beltzner
2010-10-13 23:25:33 +00:00
img.onload = imageLoadHandler;
expectedTestCount++;
// image at end
var imgfile = createFileWithData(testBinaryData + fileData);
Bug 621414 - mochitests-1: test_fileapi_slice.html logs 12 _very_ (too) long lines; (Av1a) Better differentiate check logs, Stop generating raw-binary and/or over-long log lines. rs=jonas a=(test only).
2011-01-05 11:35:55 +00:00
is(imgfile.size, size + testBinaryData.length, "correct file size (end)");
Bug 575946: Implement File.slice. r=khuey sr=biesi a=beltzner
2010-10-13 23:25:33 +00:00
var img = new Image;
Bug 649672: Make File.slice arguments match Array.slice and prefix File.slice. r=khuey
2011-04-13 21:34:36 +00:00
img.src = URL.createObjectURL(imgfile.mozSlice(testBinaryData.length, testBinaryData.length + size));
Bug 575946: Implement File.slice. r=khuey sr=biesi a=beltzner
2010-10-13 23:25:33 +00:00
img.onload = imageLoadHandler;
expectedTestCount++;
// image past end
var imgfile = createFileWithData(testBinaryData + fileData);
Bug 621414 - mochitests-1: test_fileapi_slice.html logs 12 _very_ (too) long lines; (Av1a) Better differentiate check logs, Stop generating raw-binary and/or over-long log lines. rs=jonas a=(test only).
2011-01-05 11:35:55 +00:00
is(imgfile.size, size + testBinaryData.length, "correct file size (past end)");
Bug 575946: Implement File.slice. r=khuey sr=biesi a=beltzner
2010-10-13 23:25:33 +00:00
var img = new Image;
Bug 649672: Make File.slice arguments match Array.slice and prefix File.slice. r=khuey
2011-04-13 21:34:36 +00:00
img.src = URL.createObjectURL(imgfile.mozSlice(testBinaryData.length, testBinaryData.length + size + 1000));
Bug 575946: Implement File.slice. r=khuey sr=biesi a=beltzner
2010-10-13 23:25:33 +00:00
img.onload = imageLoadHandler;
expectedTestCount++;
</script>
</pre>
</body> </html>
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