Move errors for bad imports and exports to the directive

pkg/analyzer/test/generated/resolver_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 analyzer.test.generated.resolver_test;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
@@ skipping 8237 matching lines @@
    * @param source the source against which the errors should have been reported
    * @param expectedErrorCodes the error codes of the errors that should have been reported
    * @throws AnalysisException if the reported errors could not be computed
    * @throws AssertionFailedError if a different number of errors have been reported than were
    *           expected
    */
   void assertErrors(Source source,
       [List<ErrorCode> expectedErrorCodes = ErrorCode.EMPTY_LIST]) {
     GatheringErrorListener errorListener = new GatheringErrorListener();
     for (AnalysisError error in analysisContext2.computeErrors(source)) {
+      expect(error.source, source);
       ErrorCode errorCode = error.errorCode;
       if (!enableUnusedElement &&
           (errorCode == HintCode.UNUSED_ELEMENT ||
               errorCode == HintCode.UNUSED_FIELD)) {
         continue;
       }
       if (!enableUnusedLocalVariable &&
           (errorCode == HintCode.UNUSED_CATCH_CLAUSE ||
               errorCode == HintCode.UNUSED_CATCH_STACK ||
               errorCode == HintCode.UNUSED_LOCAL_VARIABLE)) {
@@ skipping 9041 matching lines @@
 
   void _resolveTestUnit(String code) {
     testCode = code;
     testSource = addSource(testCode);
     LibraryElement library = resolve2(testSource);
     assertNoErrors(testSource);
     verify([testSource]);
     testUnit = resolveCompilationUnit(testSource, library);
   }
 }