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

pkg/http_server/test/http_body_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 'dart:io';
-import 'dart:utf';
+import 'dart:convert';
 
 import 'package:http_server/http_server.dart';
 import 'package:unittest/unittest.dart';
 
 void testHttpClientResponseBody() {
   void test(String mimeType,
             List<int> content,
             dynamic expectedBody,
             String type,
             [bool shouldFail = false]) {
@@ skipping 42 matching lines @@
        "text");
   test("text/plain; charset=iso-8859-1",
        "body".codeUnits,
        "body",
        "text");
   test("text/plain; charset=us-ascii",
        "body".codeUnits,
        "body",
        "text");
   test("text/plain; charset=utf-8", [42], "*", "text");
-  test("text/plain; charset=us-ascii", [142], "?", "text");
-  test("text/plain; charset=utf-8",
-       [142],
-       new String.fromCharCodes([UNICODE_REPLACEMENT_CHARACTER_CODEPOINT]),
-       "text");
+  test("text/plain; charset=us-ascii", [142], null, "text", true);
+  test("text/plain; charset=utf-8", [142], null, "text", true);
 
   test("application/json",
        '{"val": 5}'.codeUnits,
        { "val" : 5 },
        "json");
   test("application/json",
        '{ bad json }'.codeUnits,
        null,
        "json",
        true);
 }
 
 void testHttpServerRequestBody() {
   void test(String mimeType,
             List<int> content,
             dynamic expectedBody,
             String type,
             {bool shouldFail: false,
-             Encoding defaultEncoding: Encoding.UTF_8}) {
+             Encoding defaultEncoding: UTF8}) {
     HttpServer.bind("127.0.0.1", 0).then((server) {
       server.transform(new HttpBodyHandler(defaultEncoding: defaultEncoding))
           .listen((body) {
             expect(shouldFail, isFalse);
             expect(body.type, equals(type));
             switch (type) {
               case "text":
                 expect(body.contentType.mimeType, equals("text/plain"));
                 expect(body.body, equals(expectedBody));
                 break;
@@ skipping 59 matching lines @@
           });
     });
   }
 
   test("text/plain", "body".codeUnits, "body", "text");
   test("text/plain; charset=utf-8",
        "body".codeUnits,
        "body",
        "text");
   test("text/plain; charset=utf-8", [42], "*", "text");
-  test("text/plain; charset=us-ascii", [142], "?", "text");
-  test("text/plain; charset=utf-8",
-       [142],
-       new String.fromCharCodes([UNICODE_REPLACEMENT_CHARACTER_CODEPOINT]),
-       "text");
+  test("text/plain; charset=us-ascii", [142], null, "text", shouldFail: true);
+  test("text/plain; charset=utf-8", [142], null, "text", shouldFail: true);
 
   test("application/json",
        '{"val": 5}'.codeUnits,
        { "val" : 5 },
        "json");
   test("application/json",
        '{ bad json }'.codeUnits,
        null,
        "json",
        shouldFail: true);
@@ skipping 56 matching lines @@
 
   test('application/x-www-form-urlencoded',
        '%E5%B9%B3%3D%E4%BB%AE%E5%90%8D=%E5%B9%B3%E4%BB%AE%E5%90%8D&b'
        '=%E5%B9%B3%E4%BB%AE%E5%90%8D'.codeUnits,
        { 'b' : '平仮名',
          '平=仮名' : '平仮名'},
        "form");
 
   test('application/x-www-form-urlencoded',
        'a=%F8+%26%23548%3B'.codeUnits,
-       { 'a' : '\u{FFFD} &#548;' },
-       "form");
+       null,
+       "form",
+       shouldFail: true);
 
   test('application/x-www-form-urlencoded',
        'a=%C0%A0'.codeUnits,
-       { 'a' : '\u{FFFD}' },
-       "form");
+       null,
+       "form",
+       shouldFail: true);
 
   test('application/x-www-form-urlencoded',
        'a=x%A0x'.codeUnits,
-       { 'a' : 'x\u{FFFD}x' },
-       "form");
+       null,
+       "form",
+       shouldFail: true);
 
   test('application/x-www-form-urlencoded',
        'a=x%C0x'.codeUnits,
-       { 'a' : 'x\u{FFFD}x' },
-       "form");
+       null,
+       "form",
+       shouldFail: true);
 
   test('application/x-www-form-urlencoded',
        'a=%C3%B8+%C8%A4'.codeUnits,
        { 'a' : 'ø Ȥ' },
        "form");
 
   test('application/x-www-form-urlencoded',
        'a=%F8+%26%23548%3B'.codeUnits,
        { 'a' : 'ø &#548;' },
        "form",
-       defaultEncoding: Encoding.ISO_8859_1);
+       defaultEncoding: LATIN1);
 
   test('application/x-www-form-urlencoded',
        'name=%26'.codeUnits,
        { 'name' : '&' },
        "form",
-       defaultEncoding: Encoding.ISO_8859_1);
+       defaultEncoding: LATIN1);
 
   test('application/x-www-form-urlencoded',
        'name=%F8%26'.codeUnits,
        { 'name' : 'ø&' },
        "form",
-       defaultEncoding: Encoding.ISO_8859_1);
+       defaultEncoding: LATIN1);
 
   test('application/x-www-form-urlencoded',
        'name=%26%3B'.codeUnits,
        { 'name' : '&;' },
        "form",
-       defaultEncoding: Encoding.ISO_8859_1);
+       defaultEncoding: LATIN1);
 
   test('application/x-www-form-urlencoded',
        'name=%26%23548%3B%26%23548%3B'.codeUnits,
        { 'name' : '&#548;&#548;' },
        "form",
-       defaultEncoding: Encoding.ISO_8859_1);
+       defaultEncoding: LATIN1);
 
   test('application/x-www-form-urlencoded',
        'name=%26'.codeUnits,
        { 'name' : '&' },
        "form");
 
   test('application/x-www-form-urlencoded',
        'name=%C3%B8%26'.codeUnits,
        { 'name' : 'ø&' },
        "form");
@@ skipping 11 matching lines @@
   test('application/x-www-form-urlencoded',
        'name=%C8%A4%C8%A4'.codeUnits,
        { 'name' : 'ȤȤ' },
        "form");
 }
 
 void main() {
   testHttpClientResponseBody();
   testHttpServerRequestBody();
 }