blob: 3a6a7471a484f0cab96cf9712264980f3355867c [file] [log] [blame]
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
library url_test;
import 'dart:async';
import 'dart:html';
import 'dart:typed_data';
import 'package:expect/minitest.dart'; // ignore: deprecated_member_use_from_same_package
Blob createImageBlob() {
var canvas = new CanvasElement();
canvas.width = 100;
canvas.height = 100;
var context = canvas.context2D;
context.fillStyle = 'red';
context.fillRect(0, 0, canvas.width!, canvas.height!);
var dataUri = canvas.toDataUrl('image/png');
var byteString = window.atob(dataUri.split(',')[1]);
var mimeString = dataUri.split(',')[0].split(':')[1].split(';')[0];
var arrayBuffer = new Uint8List(byteString.length);
var dataArray = new Uint8List.view(arrayBuffer.buffer);
for (var i = 0; i < byteString.length; i++) {
dataArray[i] = byteString.codeUnitAt(i);
}
var blob = new Blob([arrayBuffer], 'image/png');
return blob;
}
Future testCreateObjectUrlFromBlob() async {
final done = new Completer();
var blob = createImageBlob();
var url = Url.createObjectUrlFromBlob(blob);
expect(url.length, greaterThan(0));
expect(url.startsWith('blob:'), isTrue);
var img = new ImageElement();
img.onLoad.listen((_) {
expect(img.complete, true);
done.complete();
});
img.onError.listen((_) {
fail('URL failed to load.');
});
img.src = url;
await done.future;
}
Future testRevokeObjectUrl() async {
final done = new Completer();
var blob = createImageBlob();
var url = Url.createObjectUrlFromBlob(blob);
expect(url.startsWith('blob:'), isTrue);
Url.revokeObjectUrl(url);
var img = new ImageElement();
// Image should fail to load since the URL was revoked.
img.onError.listen(done.complete);
img.onLoad.listen((_) {
fail('URL should not have loaded.');
});
img.src = url;
await done.future;
}
main() async {
await testCreateObjectUrlFromBlob();
await testRevokeObjectUrl();
}