Fix for limited invalidation in the middle, and the unlimited invalidation for an exported library.

pkg/analyzer/test/src/context/context_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.src.context.context_test;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 3612 matching lines @@
   int foo;
 }
 ''');
     _assertValidForChangedLibrary(a);
     _assertInvalid(a, LIBRARY_ERRORS_READY);
     _assertValidForDependentLibrary(b);
     _assertValidAllLibraryUnitResults(b);
     _assertValid(b, LIBRARY_ERRORS_READY);
   }
 
+  void test_sequence_middleLimited_thenFirstFull() {
+    Source a = addSource(
+        '/a.dart',
+        r'''
+class A {}
+''');
+    Source b = addSource(
+        '/b.dart',
+        r'''
+export 'a.dart';
+''');
+    Source c = addSource(
+        '/c.dart',
+        r'''
+import 'b.dart';
+A a;
+''');
+    _performPendingAnalysisTasks();
+    // Update b.dart: limited invalidation.
+    // Results in c.dart are valid, because the change in b.dart does not
+    // affect anything in c.dart.
+    context.setContents(
+        b,
+        r'''
+export 'a.dart';
+class B {}
+''');
+    _assertValid(a, LIBRARY_ERRORS_READY);
+    _assertInvalid(b, LIBRARY_ERRORS_READY);
+    _assertValid(c, LIBRARY_ERRORS_READY);
+    _assertUnitValid(c, RESOLVED_UNIT4);
+    _assertUnitValid(c, RESOLVED_UNIT5);
+    // Update a.dart: unlimited invalidation.
+    // Results RESOLVED_UNIT4, RESOLVED_UNIT5, and RESOLVED_UNIT6 in c.dart
+    // are invalid, because after unlimited change to a.dart everything
+    // should be invalidated.
+    // This fixes the problem that c.dart was not re-resolving type names.
+    context.setContents(
+        a,
+        r'''
+import 'dart:async';
+class A {}
+''');
+    _assertInvalid(a, LIBRARY_ERRORS_READY);
+    _assertInvalid(b, LIBRARY_ERRORS_READY);
+    _assertInvalid(c, LIBRARY_ERRORS_READY);
+    _assertInvalidUnits(c, RESOLVED_UNIT4);
+  }
+
   void test_sequence_noChange_thenChange() {
     Source a = addSource(
         '/a.dart',
         r'''
 class A {
   A();
 }
 
 class B {
   B();
@@ skipping 732 matching lines @@
    * Initialize the visitor.
    */
   _ElementGatherer();
 
   @override
   void visitElement(Element element) {
     elements[element] = element;
     super.visitElement(element);
   }
 }