Extract testing utilities into a separate package.

pkg/analysis_server/test/operation/operation_analysis_test.dart

 // Copyright (c) 2014, 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 test.operation.analysis;
 
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/operation/operation_analysis.dart';
+import 'package:analysis_testing/mocks.dart';
+import 'package:analysis_testing/reflective_tests.dart';
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:typed_mock/typed_mock.dart';
 import 'package:unittest/unittest.dart';
 
-import '../reflective_tests.dart';
-import '../typed_mocks.dart';
 
 main() {
   groupSep = ' | ';
 
   group('errorToJson', () {
     runReflectiveTests(Test_errorToJson);
   });
 }
 
 
 class AnalysisErrorMock extends TypedMock implements AnalysisError {
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 }
 
 
 @ReflectiveTestCase()
 class Test_errorToJson {
-  Source source = new SourceMock();
+  Source source = new MockSource();
   LineInfo lineInfo;
   AnalysisError analysisError = new AnalysisErrorMock();
 
   void setUp() {
     // prepare Source
     when(source.fullName).thenReturn('foo.dart');
     // prepare LineInfo
     lineInfo = new LineInfo([0, 5, 9, 20]);
     // prepare AnalysisError
     when(analysisError.source).thenReturn(source);
@@ skipping 53 matching lines @@
         OFFSET: 10,
         LENGTH: 20,
         START_LINE: 3,
         START_COLUMN: 2
       },
       MESSAGE: 'my message',
       CORRECTION: 'my correction'
     });
   }
 }