dart-sdk/tests/lib/html/url_test.dart
Srujan Gaddam 28b8cb34d3 [dart:html] Unify shared attribute metadata from MDN
browser-compat-data includes info on elements as both part of the
Web API and the individual tagged elements. The scripts would default
to whatever was processed last instead of trying to unify any conflicts
that may come up with the different sources of truth. This CL addresses
that issue by choosing the "stricter" of the two versions.

Change-Id: Id3437c14276faf8af3fe41d7a6eb83defc9bd0b0
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/155844
Commit-Queue: Srujan Gaddam <srujzs@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>
2020-08-25 23:48:43 +00:00

76 lines
2 KiB
Dart

// 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';
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// Image should fail to load since the URL was revoked.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();
}