Remove Encoding-enum from dart:io and add interface in dart:convert.

tests/standalone/io/string_decoder_test.dart

Index: tests/standalone/io/string_decoder_test.dart
diff --git a/tests/standalone/io/string_decoder_test.dart b/tests/standalone/io/string_decoder_test.dart
deleted file mode 100644
index 049173c63e3218baf5a27794e71d01b870e690ea..0000000000000000000000000000000000000000
--- a/tests/standalone/io/string_decoder_test.dart
+++ /dev/null
@@ -1,94 +0,0 @@
-// 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:io";
-
-const UNICODE_REPLACEMENT_CHARACTER_RUNE = 0xFFFD;
-
-void testTransform() {
-  // Code point U+10FFFF is the largest code point supported by Dart.
-  var controller = new StreamController(sync: true);
-  controller.add([0xf0, 0x90, 0x80, 0x80]);  // U+10000
-  controller.add([0xf4, 0x8f, 0xbf, 0xbf]);  // U+10FFFF
-  controller.add([0xf4, 0x90, 0x80, 0x80]);  // U+110000
-  controller.add([0xfa, 0x80, 0x80, 0x80, 0x80]);  //  U+2000000
-  controller.add([0xfd, 0x80, 0x80, 0x80, 0x80, 0x80]);  // U+40000000
-  controller.close();
-
-  var decoder = new StringDecoder(Encoding.UTF_8);
-  var stream = controller.stream.transform(decoder);
-  stream.fold(
-      new StringBuffer(),
-      (b, e) {
-        b.write(e);
-        return b;
-      })
-      .then((b) => b.toString())
-      .then((decoded) {
-        Expect.equals(16, decoded.length);
-
-        var replacementChar = UNICODE_REPLACEMENT_CHARACTER_RUNE;
-        Expect.equals(0xd800, decoded.codeUnitAt(0));
-        Expect.equals(0xdc00, decoded.codeUnitAt(1));
-        Expect.equals(0xdbff, decoded.codeUnitAt(2));
-        Expect.equals(0xdfff, decoded.codeUnitAt(3));
-        for (int i = 4; i < 16; i++) {
-          Expect.equals(replacementChar, decoded.codeUnitAt(i));
-        }
-      });
-}
-
-void testDecode() {
-  // Code point U+10FFFF is the largest code point supported by Dart.
-  var controller = new StreamController(sync: true);
-  controller.add([0xf0, 0x90, 0x80, 0x80]);  // U+10000
-  controller.add([0xf4, 0x8f, 0xbf, 0xbf]);  // U+10FFFF
-  controller.add([0xf4, 0x90, 0x80, 0x80]);  // U+110000
-  controller.add([0xfa, 0x80, 0x80, 0x80, 0x80]);  //  U+2000000
-  controller.add([0xfd, 0x80, 0x80, 0x80, 0x80, 0x80]);  // U+40000000
-  controller.close();
-
-  StringDecoder.decode(controller.stream, Encoding.UTF_8)
-               .then((decoded) {
-    Expect.equals(16, decoded.length);
-
-    var replacementChar = UNICODE_REPLACEMENT_CHARACTER_RUNE;
-    Expect.equals(0xd800, decoded.codeUnitAt(0));
-    Expect.equals(0xdc00, decoded.codeUnitAt(1));
-    Expect.equals(0xdbff, decoded.codeUnitAt(2));
-    Expect.equals(0xdfff, decoded.codeUnitAt(3));
-    for (int i = 4; i < 16; i++) {
-      Expect.equals(replacementChar, decoded.codeUnitAt(i));
-     }
-  });
-}
-
-void testInvalid() {
-  void invalid(var bytes, var outputLength) {
-    var controller = new StreamController(sync: true);
-    controller.add(bytes);
-    controller.close();
-    controller.stream.transform(new StringDecoder()).listen((string) {
-      Expect.equals(outputLength, string.length);
-      for (var i = 0; i < outputLength; i++) {
-        Expect.equals(UNICODE_REPLACEMENT_CHARACTER_RUNE,
-                      string.codeUnitAt(i));
-      }
-    });
-  }
-
-  invalid([0x80], 1);
-  invalid([0xff], 1);
-  invalid([0xf0, 0xc0], 1);
-  invalid([0xc0, 0x80], 1);
-  invalid([0xfd, 0x80, 0x80], 3); // Unfinished encoding.
-}
-
-void main() {
-  testTransform();
-  testDecode();
-  testInvalid();
-}