Add browser-compatible version.

test/browser_http_test.dart

+// Copyright (c) 2015, 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.
+
+@TestOn("browser")
+
+import "dart:async";
+import "dart:convert";
+
+import "package:resource/browser_resource.dart";
+import "package:test/test.dart";
+
+const content = "Rødgrød med fløde";
+
+main() {
+  // Assume test files located next to Uri.base.
+  // This is how "pub run test" currently works.
+
+  test("Default encoding", () async {
+    var loader = ResourceLoader.defaultLoader;
+    // The HTTPXmlRequest loader defaults to UTF-8 encoding.
+    var uri = Uri.base.resolve("testfile-utf8.txt");
+    String string = await loader.readAsString(uri);
+    expect(string, content);
+  });
+
+  test("Latin-1 encoding", () async {
+    var loader = ResourceLoader.defaultLoader;
+    var uri = Uri.base.resolve("testfile-latin1.txt");
+    String string = await loader.readAsString(uri, encoding: LATIN1);
+    expect(string, content);
+  });
+
+  test("UTF-8 encoding", () async {
+    var loader = ResourceLoader.defaultLoader;
+    var uri = Uri.base.resolve("testfile-utf8.txt");
+    String string = await loader.readAsString(uri, encoding: UTF8);
+    expect(string, content);
+  });
+
+  test("bytes", () async {
+    var loader = ResourceLoader.defaultLoader;
+    var uri = Uri.base.resolve("testfile-latin1.txt");
+    List<int> bytes = await loader.readAsBytes(uri);
+    expect(bytes, content.codeUnits);
+  });
+
+  test("byte stream", () async {
+    var loader = ResourceLoader.defaultLoader;
+    var uri = Uri.base.resolve("testfile-latin1.txt");
+    Stream<List<int>> bytes = loader.openRead(uri);
+    var buffer = [];
+    await bytes.forEach(buffer.addAll);
+    expect(buffer, content.codeUnits);
+  });
+}