Rewrite test

tests/standalone/io/string_decoder_test.dart

-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
-part '../../../sdk/lib/io/buffer_list.dart';
-part '../../../sdk/lib/io/input_stream.dart';
-part '../../../sdk/lib/io/string_stream.dart';
+import "dart:io";
 
 void test() {
   // Code point U+10FFFF is the largest code point supported by Dart.
-  var decoder = _StringDecoders.decoder(Encoding.UTF_8);
-  decoder.write([0xf0, 0x90, 0x80, 0x80]);  // U+10000
-  decoder.write([0xf4, 0x8f, 0xbf, 0xbf]);  // U+10FFFF
-  decoder.write([0xf4, 0x90, 0x80, 0x80]);  // U+110000
-  decoder.write([0xfa, 0x80, 0x80, 0x80, 0x80]);  //  U+2000000
-  decoder.write([0xfd, 0x80, 0x80, 0x80, 0x80, 0x80]);  // U+40000000
+  //var decoder = _StringDecoders.decoder(Encoding.UTF_8);
+  ListInputStream lis = new ListInputStream();
+  lis.write([0xf0, 0x90, 0x80, 0x80]);  // U+10000
+  lis.write([0xf4, 0x8f, 0xbf, 0xbf]);  // U+10FFFF
+  lis.write([0xf4, 0x90, 0x80, 0x80]);  // U+110000
+  lis.write([0xfa, 0x80, 0x80, 0x80, 0x80]);  //  U+2000000
+  lis.write([0xfd, 0x80, 0x80, 0x80, 0x80, 0x80]);  // U+40000000
+  lis.markEndOfStream();
 
-  var decoded = decoder.decoded();
-  Expect.equals(7, decoded.length);
+  var sis = new StringInputStream(lis);
+  sis.onData = () {
+    var decoded = sis.read();
+    Expect.equals(7, decoded.length);
 
-  var replacementChar = '?'.charCodeAt(0);
-  Expect.equals(0xd800, decoded.charCodeAt(0));
-  Expect.equals(0xdc00, decoded.charCodeAt(1));
-  Expect.equals(0xdbff, decoded.charCodeAt(2));
-  Expect.equals(0xdfff, decoded.charCodeAt(3));
-  Expect.equals(replacementChar, decoded.charCodeAt(4));
-  Expect.equals(replacementChar, decoded.charCodeAt(5));
-  Expect.equals(replacementChar, decoded.charCodeAt(6));
+    var replacementChar = '?'.charCodeAt(0);
+    Expect.equals(0xd800, decoded.charCodeAt(0));
+    Expect.equals(0xdc00, decoded.charCodeAt(1));
+    Expect.equals(0xdbff, decoded.charCodeAt(2));
+    Expect.equals(0xdfff, decoded.charCodeAt(3));
+    Expect.equals(replacementChar, decoded.charCodeAt(4));
+    Expect.equals(replacementChar, decoded.charCodeAt(5));
+    Expect.equals(replacementChar, decoded.charCodeAt(6));
+  };
 }
 
 void testInvalid() {
-  var decoder = _StringDecoders.decoder(Encoding.UTF_8);
-  Expect.throws(() => decoder.write([0x80]));
-  Expect.throws(() => decoder.write([0xff]));
-  Expect.throws(() => decoder.write([0xf0, 0xc0]));
+  void invalid(var bytes) {
+    ListInputStream lis = new ListInputStream();
+    lis.write(bytes);
+    lis.markEndOfStream();
+    var sis = new StringInputStream(lis);
+    sis.onData = () { throw "onData not expected"; };
+    sis.onError = (e) { Expect.isTrue(e is DecoderException); };
+    sis.onClosed = () { throw "onClosed not expected"; };
+  }
+
+  invalid([0x80]);
+  invalid([0xff]);
+  invalid([0xf0, 0xc0]);
 }
 
 void main() {
   test();
   testInvalid();
 }