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

pkg/http/test/request_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.
 
 library request_test;
 
+import 'dart:convert';
 import 'dart:io';
 
 import 'package:http/http.dart' as http;
 import 'package:unittest/unittest.dart';
 
 import 'utils.dart';
 
 void main() {
   test('.send', () {
     expect(startServer().then((_) {
@@ skipping 38 matching lines @@
 
     test('is not directly mutable', () {
       var request = new http.Request('POST', dummyUrl);
       expect(() => request.contentLength = 50, throwsUnsupportedError);
     });
   });
 
   group('#encoding', () {
     test('defaults to utf-8', () {
       var request = new http.Request('POST', dummyUrl);
-      expect(request.encoding.name, equals(Encoding.UTF_8.name));
+      expect(request.encoding.name, equals(UTF8.name));
     });
 
     test('can be set', () {
       var request = new http.Request('POST', dummyUrl);
-      request.encoding = Encoding.ISO_8859_1;
-      expect(request.encoding.name, equals(Encoding.ISO_8859_1.name));
+      request.encoding = LATIN1;
+      expect(request.encoding.name, equals(LATIN1.name));
     });
 
     test('is based on the content-type charset if it exists', () {
       var request = new http.Request('POST', dummyUrl);
       request.headers[HttpHeaders.CONTENT_TYPE] =
           'text/plain; charset=iso-8859-1';
-      expect(request.encoding.name, equals(Encoding.ISO_8859_1.name));
+      expect(request.encoding.name, equals(LATIN1.name));
     });
 
     test('remains the default if the content-type charset is set and unset',
         () {
       var request = new http.Request('POST', dummyUrl);
-      request.encoding = Encoding.ISO_8859_1;
+      request.encoding = LATIN1;
       request.headers[HttpHeaders.CONTENT_TYPE] =
           'text/plain; charset=utf-8';
-      expect(request.encoding.name, equals(Encoding.UTF_8.name));
+      expect(request.encoding.name, equals(UTF8.name));
 
       request.headers.remove(HttpHeaders.CONTENT_TYPE);
-      expect(request.encoding.name, equals(Encoding.ISO_8859_1.name));
+      expect(request.encoding.name, equals(LATIN1.name));
     });
 
     test('throws an error if the content-type charset is unknown', () {
       var request = new http.Request('POST', dummyUrl);
       request.headers[HttpHeaders.CONTENT_TYPE] =
           'text/plain; charset=not-a-real-charset';
       expect(() => request.encoding, throwsFormatException);
     });
   });
 
@@ skipping 132 matching lines @@
   });
 
   group('content-type header', () {
     test('defaults to empty', () {
       var request = new http.Request('POST', dummyUrl);
       expect(request.headers[HttpHeaders.CONTENT_TYPE], isNull);
     });
 
     test('defaults to empty if only encoding is set', () {
       var request = new http.Request('POST', dummyUrl);
-      request.encoding = Encoding.ISO_8859_1;
+      request.encoding = LATIN1;
       expect(request.headers[HttpHeaders.CONTENT_TYPE], isNull);
     });
 
     test('is set to application/x-www-form-urlencoded with charset utf-8 if '
         'bodyFields is set', () {
       var request = new http.Request('POST', dummyUrl);
       request.bodyFields = {'hello': 'world'};
       expect(request.headers[HttpHeaders.CONTENT_TYPE],
           equals('application/x-www-form-urlencoded; charset=utf-8'));
     });
 
     test('is set to application/x-www-form-urlencoded with the given charset '
         'if bodyFields and encoding are set', () {
       var request = new http.Request('POST', dummyUrl);
-      request.encoding = Encoding.ISO_8859_1;
+      request.encoding = LATIN1;
       request.bodyFields = {'hello': 'world'};
       expect(request.headers[HttpHeaders.CONTENT_TYPE],
           equals('application/x-www-form-urlencoded; charset=iso-8859-1'));
     });
 
     test('is set to text/plain and the given encoding if body and encoding are '
         'both set', () {
       var request = new http.Request('POST', dummyUrl);
-      request.encoding = Encoding.ISO_8859_1;
+      request.encoding = LATIN1;
       request.body = 'hello, world';
       expect(request.headers[HttpHeaders.CONTENT_TYPE],
           equals('text/plain; charset=iso-8859-1'));
     });
 
     test('is modified to include utf-8 if body is set', () {
       var request = new http.Request('POST', dummyUrl);
       request.headers[HttpHeaders.CONTENT_TYPE] = 'application/json';
       request.body = '{"hello": "world"}';
       expect(request.headers[HttpHeaders.CONTENT_TYPE],
           equals('application/json; charset=utf-8'));
     });
 
     test('is modified to include the given encoding if encoding is set', () {
       var request = new http.Request('POST', dummyUrl);
       request.headers[HttpHeaders.CONTENT_TYPE] = 'application/json';
-      request.encoding = Encoding.ISO_8859_1;
+      request.encoding = LATIN1;
       expect(request.headers[HttpHeaders.CONTENT_TYPE],
           equals('application/json; charset=iso-8859-1'));
     });
 
     test('has its charset overridden by an explicit encoding', () {
       var request = new http.Request('POST', dummyUrl);
       request.headers[HttpHeaders.CONTENT_TYPE] =
           'application/json; charset=utf-8';
-      request.encoding = Encoding.ISO_8859_1;
+      request.encoding = LATIN1;
       expect(request.headers[HttpHeaders.CONTENT_TYPE],
           equals('application/json; charset=iso-8859-1'));
     });
 
     test("doen't have its charset overridden by setting bodyFields", () {
       var request = new http.Request('POST', dummyUrl);
       request.headers[HttpHeaders.CONTENT_TYPE] =
           'application/x-www-form-urlencoded; charset=iso-8859-1';
       request.bodyFields = {'hello': 'world'};
       expect(request.headers[HttpHeaders.CONTENT_TYPE],
@@ skipping 39 matching lines @@
       request.finalize();
 
       expect(request.maxRedirects, equals(5));
       expect(() => request.maxRedirects = 10, throwsStateError);
     });
 
     test('freezes #encoding', () {
       var request = new http.Request('POST', dummyUrl);
       request.finalize();
 
-      expect(request.encoding.name, equals(Encoding.UTF_8.name));
-      expect(() => request.encoding = Encoding.ASCII, throwsStateError);
+      expect(request.encoding.name, equals(UTF8.name));
+      expect(() => request.encoding = ASCII, throwsStateError);
     });
 
     test('freezes #bodyBytes', () {
       var request = new http.Request('POST', dummyUrl);
       request.bodyBytes = [1, 2, 3];
       request.finalize();
 
       expect(request.bodyBytes, equals([1, 2, 3]));
       expect(() => request.bodyBytes = [4, 5, 6], throwsStateError);
     });
@@ skipping 24 matching lines @@
   });
 
   group('#toString()', () {
     test('includes the method and URL', () {
       var request = new http.Request('POST', dummyUrl);
       expect(request.toString(), 'POST $dummyUrl');
     });
   });
 }