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

tests/standalone/io/string_transformer_test.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.
-
-import "dart:async";
-import "dart:convert";
-import "dart:io";
-import "dart:isolate";
-
-import "package:expect/expect.dart";
-
-const UNICODE_REPLACEMENT_CHARACTER_CODEPOINT = 0xFFFD;
-
-void main() {
-  testUtf8();
-  testLatin1();
-  testAscii();
-  testReadLine1();
-  testReadLine2();
-  testErrorHandler();
-  testLatin1EncoderError();
-}
-
-void testUtf8() {
-  List<int> data = [0x01,
-                    0x7f,
-                    0xc2, 0x80,
-                    0xdf, 0xbf,
-                    0xe0, 0xa0, 0x80,
-                    0xef, 0xbf, 0xbf,
-                    0xf0, 0x9d, 0x84, 0x9e,
-                    0x100, -0x1, -0xFF];
-  var controller = new StreamController(sync: true);
-  controller.add(data);
-  controller.close();
-  var stringStream = controller.stream
-    .transform(new StringDecoder(Encoding.UTF_8));
-  stringStream.listen(
-    (s) {
-      Expect.equals(11, s.length);
-      Expect.equals(new String.fromCharCodes([0x01]), s[0]);
-      Expect.equals(new String.fromCharCodes([0x7f]), s[1]);
-      Expect.equals(new String.fromCharCodes([0x80]), s[2]);
-      Expect.equals(new String.fromCharCodes([0x7ff]), s[3]);
-      Expect.equals(new String.fromCharCodes([0x800]), s[4]);
-      Expect.equals(new String.fromCharCodes([0xffff]), s[5]);
-      Expect.equals(new String.fromCharCodes([0xffff]), s[5]);
-
-      // Surrogate pair for U+1D11E.
-      Expect.equals(new String.fromCharCodes([0xd834, 0xdd1e]),
-                    s.substring(6, 8));
-
-      Expect.equals(new String.fromCharCodes(
-          [UNICODE_REPLACEMENT_CHARACTER_CODEPOINT,
-           UNICODE_REPLACEMENT_CHARACTER_CODEPOINT,
-           UNICODE_REPLACEMENT_CHARACTER_CODEPOINT]),
-          s.substring(8, 11));
-    });
-}
-
-void testLatin1() {
-  List<int> data = [0x01,
-                    0x7f,
-                    0x44, 0x61, 0x72, 0x74,
-                    0x80,
-                    0xff,
-                    0x100, -0x1, -0xff];
-  var controller = new StreamController(sync: true);
-  controller.add(data);
-  controller.close();
-  var stream = controller.stream
-    .transform(new StringDecoder(Encoding.ISO_8859_1));
-  stream.listen((s) {
-    Expect.equals(11, s.length);
-    Expect.equals(new String.fromCharCodes([0x01]), s[0]);
-    Expect.equals(new String.fromCharCodes([0x7f]), s[1]);
-    Expect.equals("Dart", s.substring(2, 6));
-    Expect.equals(new String.fromCharCodes([0x80]), s[6]);
-    Expect.equals(new String.fromCharCodes([0xff]), s[7]);
-    Expect.equals('???', s.substring(8, 11));
-  });
-}
-
-void testAscii() {
-  List<int> data = [0x01,
-                    0x44, 0x61, 0x72, 0x74,
-                    0x7f,
-                    0xf4, 0x100, -0x1, -0xff];
-  var controller = new StreamController(sync: true);
-  controller.add(data);
-  controller.close();
-  var stream = controller.stream
-    .transform(new StringDecoder(Encoding.ASCII));
-  stream.listen((s) {
-    Expect.equals(10, s.length);
-    Expect.equals(new String.fromCharCodes([0x01]), s[0]);
-    Expect.equals("Dart", s.substring(1, 5));
-    Expect.equals(new String.fromCharCodes([0x7f]), s[5]);
-    Expect.equals('????', s.substring(6, 10));
-  });
-}
-
-void testReadLine1() {
-  var controller = new StreamController(sync: true);
-  var stream = controller.stream
-      .transform(new StringDecoder())
-      .transform(new LineSplitter());
-
-  var stage = 0;
-
-  void stringData(line) {
-    Expect.equals(stage, 0);
-    Expect.equals("Line", line);
-    stage++;
-  }
-
-  void streamClosed() {
-    Expect.equals(1, stage);
-  }
-
-  stream.listen(
-      stringData,
-      onDone: streamClosed);
-
-  // Note: codeUnits is fine. Text is ASCII.
-  controller.add("Line".codeUnits);
-  controller.close();
-  Expect.equals(1, stage);
-}
-
-void testReadLine2() {
-  var controller = new StreamController(sync: true);
-
-  var stream = controller.stream
-    .transform(new StringDecoder())
-    .transform(new LineSplitter());
-
-  var expectedLines = ['Line1', 'Line2','Line3', 'Line4',
-                       '', '', '', '', '', '',
-                       'Line5', 'Line6'];
-
-  var index = 0;
-
-  stream.listen((line) {
-    Expect.equals(expectedLines[index++], line);
-  });
-
-  // Note: codeUnits is fine. Text is ASCII.
-  controller.add("Line1\nLine2\r\nLine3\rLi".codeUnits);
-  controller.add("ne4\n".codeUnits);
-  controller.add("\n\n\r\n\r\n\r\r".codeUnits);
-  controller.add("Line5\r".codeUnits);
-  controller.add("\nLine6\n".codeUnits);
-  controller.close();
-  Expect.equals(expectedLines.length, index);
-}
-
-class TestException implements Exception {
-  TestException();
-}
-
-void testErrorHandler() {
-  var controller = new StreamController(sync: true);
-  var errors = 0;
-  var stream = controller.stream
-    .transform(new StringDecoder())
-    .transform(new LineSplitter());
-  stream.listen(
-      (_) {},
-      onDone: () {
-        Expect.equals(1, errors);
-      },
-      onError: (error) {
-        errors++;
-        Expect.isTrue(error is TestException);
-      });
-  controller.addError(new TestException());
-  controller.close();
-}
-
-void testLatin1EncoderError() {
-  List<int> data = [0x01,
-                    0x7f,
-                    0x44, 0x61, 0x72, 0x74,
-                    0x80,
-                    0xff,
-                    0x100];
-  var controller = new StreamController(sync: true);
-  controller.add(new String.fromCharCodes(data));
-  controller.close();
-  var stream = controller.stream
-    .transform(new StringEncoder(Encoding.ISO_8859_1));
-  stream.listen(
-    (s) {
-      Expect.fail("data not expected");
-    },
-    onError: (error) {
-      Expect.isTrue(error is FormatException);
-    });
-
-}