Switch analysis_server to use 'package:test'.

pkg/analysis_server/test/services/completion/completion_target_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.services.completion.target;
 
 import 'package:analysis_server/src/provisional/completion/dart/completion_target.dart';
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/src/generated/source.dart';
+import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
-import 'package:unittest/unittest.dart';
 
 import '../../abstract_context.dart';
 import '../../utils.dart';
 
 main() {
   initializeTestEnvironment();
-  defineReflectiveTests(CompletionTargetTest);
+  defineReflectiveSuite(() {
+    defineReflectiveTests(CompletionTargetTest);
+  });
 }
 
 @reflectiveTest
 class CompletionTargetTest extends AbstractContextTest {
   Source testSource;
   int completionOffset;
   CompletionTarget target;
 
   void addTestSource(String content) {
     expect(completionOffset, isNull, reason: 'Call addTestSource exactly once');
     completionOffset = content.indexOf('^');
     expect(completionOffset, isNot(equals(-1)), reason: 'missing ^');
     int nextOffset = content.indexOf('^', completionOffset + 1);
     expect(nextOffset, equals(-1), reason: 'too many ^');
     content = content.substring(0, completionOffset) +
         content.substring(completionOffset + 1);
     testSource = addSource('/test.dart', content);
     CompilationUnit unit = context.parseCompilationUnit(testSource);
     target = new CompletionTarget.forOffset(unit, completionOffset);
   }
 
   void assertTarget(entityText, nodeText,
       {int argIndex: null, bool isFunctionalArgument: false}) {
     void assertCommon() {
       expect(target.entity.toString(), entityText, reason: 'entity');
       expect(target.containingNode.toString(), nodeText,
           reason: 'containingNode');
       expect(target.argIndex, argIndex, reason: 'argIndex');
     }
+
     // Assert with parsed unit
     assertCommon();
     CompilationUnit unit =
         context.resolveCompilationUnit2(testSource, testSource);
     target = new CompletionTarget.forOffset(unit, completionOffset);
     // Assert more with resolved unit
     assertCommon();
     expect(target.isFunctionalArgument(), isFunctionalArgument);
   }
 
@@ skipping 504 matching lines @@
     addTestSource('main() {int b^ = 1;}');
     assertTarget('b = 1', 'int b = 1');
   }
 
   test_VariableDeclaration_lhs_identifier_before() {
     // VariableDeclaration  VariableDeclarationList
     addTestSource('main() {int ^b = 1;}');
     assertTarget('b = 1', 'int b = 1');
   }
 }