Use ConstantVerifier in VerifyUnitTask.

pkg/analyzer/test/src/task/dart_test.dart

 // Copyright (c) 2015, 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.src.task.dart_test;
 
 import 'package:analyzer/src/context/cache.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/constant.dart';
 import 'package:analyzer/src/generated/element.dart';
@@ skipping 2609 matching lines @@
 
   void _performScanTask(String content) {
     AnalysisTarget target = newSource('/test.dart', content);
     _computeResult(target, TOKEN_STREAM);
     expect(task, new isInstanceOf<ScanDartTask>());
   }
 }
 
 @reflectiveTest
 class VerifyUnitTaskTest extends _AbstractDartTaskTest {
+  test_perform_constantError() {
+    Source source = newSource('/test.dart', '''
+main(int p) {
+  const v = p;
+}
+''');
+    LibrarySpecificUnit target = new LibrarySpecificUnit(source, source);
+    _computeResult(target, VERIFY_ERRORS);
+    expect(task, new isInstanceOf<VerifyUnitTask>());
+    // validate
+    _fillErrorListener(VERIFY_ERRORS);
+    errorListener.assertErrorsWithCodes(<ErrorCode>[
+      CompileTimeErrorCode.CONST_INITIALIZED_WITH_NON_CONSTANT_VALUE
+    ]);
+  }
+
   test_perform_directiveError() {
     Source source = newSource('/test.dart', '''
 import 'no-such-file.dart';
 ''');
     LibrarySpecificUnit target = new LibrarySpecificUnit(source, source);
     _computeResult(target, VERIFY_ERRORS);
     expect(task, new isInstanceOf<VerifyUnitTask>());
     // validate
     _fillErrorListener(VERIFY_ERRORS);
     errorListener.assertErrorsWithCodes(
@@ skipping 60 matching lines @@
   /**
    * Fill [errorListener] with [result] errors in the current [task].
    */
   void _fillErrorListener(ResultDescriptor<List<AnalysisError>> result) {
     List<AnalysisError> errors = task.outputs[result];
     expect(errors, isNotNull, reason: result.name);
     errorListener = new GatheringErrorListener();
     errorListener.addAll(errors);
   }
 }