adding HtmlEscape to dart:convert

tests/lib/convert/html_escape_test.dart

+// Copyright (c) 2013, 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.
+
+import "package:expect/expect.dart";
+import 'dart:async';
+import 'dart:convert';
+
+const _TEST_INPUT = 'A <test> of \u00A0 "double" & \'single\' values';
+
+const _OUTPUT_UNKNOWN = 'A &lt;test&gt; of &nbsp; &quot;double&quot; &amp; '
+  '&apos;single&apos; values';
+
+const _OUTPUT_ATTRIBUTE = "A <test> of &nbsp; &quot;double&quot; &amp; \'single\' values";

[floitsch, 2013/08/30 15:52:00]

80 chars.

[kevmoo-old, 2013/09/05 19:14:20]

Done.

+
+const _OUTPUT_ELEMENT = 'A <test> of   "double" & \'single\' values';

[floitsch, 2013/08/30 15:52:00]

80 chars.

[kevmoo-old, 2013/09/05 19:14:20]

Done.

+
+void main() {

[floitsch, 2013/08/30 15:52:00]

move main to the bottom of the file.

[kevmoo-old, 2013/09/05 19:14:20]

Done.

+  testMode(HTML_ESCAPE, _OUTPUT_UNKNOWN);
+  testMode(const HtmlEscape(), _OUTPUT_UNKNOWN);
+  testMode(const HtmlEscape(HtmlEscapeMode.UNKNOWN), _OUTPUT_UNKNOWN);
+  testMode(const HtmlEscape(HtmlEscapeMode.ATTRIBUTE), _OUTPUT_ATTRIBUTE);
+  testMode(const HtmlEscape(HtmlEscapeMode.ELEMENT), _OUTPUT_ELEMENT);
+}
+
+void testMode(HtmlEscape escape, String expected) {
+  var output = escape.convert(_TEST_INPUT);
+  Expect.equals(expected, output);
+
+  var controller = new StreamController(sync: true);
+
+  var stream = controller.stream
+      .transform(escape);
+
+  var done = false;
+  int count = 0;
+
+  void stringData(value) {
+    Expect.equals(expected, value);
+    count++;
+  }
+
+  void streamClosed() {
+    done = true;
+  }
+
+  stream.listen(
+      stringData,
+      onDone: streamClosed);
+
+
+  for(var i = 0; i < _COUNT; i++) {
+    controller.add(_TEST_INPUT);
+  }
+  controller.close();
+  Expect.isTrue(done);
+  Expect.equals(_COUNT, count);
+}
+
+const _COUNT = 3;