Serve INCLUDED_PARTS from incremental cache.

pkg/analyzer/test/src/summary/incremental_cache_test.dart

 // Copyright (c) 2016, 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.
 
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/summary/incremental_cache.dart';
 import 'package:unittest/unittest.dart';
 
@@ skipping 103 matching lines @@
   void test_getLibraryClosureBundles_onlyLibrary() {
     putTestLibrary(r'''
 main() {}
 ''');
     // the cache is empty, no bundles
     List<LibraryBundleWithId> bundles =
         cache.getLibraryClosureBundles(testSource);
     expect(bundles, isNotNull);
   }
 
+  void test_getLibraryParts_hasParts() {
+    Source part1Source = addSource('/part1.dart', r'part of test;');
+    Source part2Source = addSource('/part2.dart', r'part of test;');
+    putTestLibrary(r'''
+library test;
+part 'part1.dart';
+part 'part2.dart';
+''');
+    expect(cache.getLibraryParts(testSource),
+        unorderedEquals([part1Source, part2Source]));
+  }
+
+  void test_getLibraryParts_noParts() {
+    putTestLibrary(r'''
+main() {}
+''');
+    expect(cache.getLibraryParts(testSource), isEmpty);
+  }
+
   void test_getSourceErrorsInLibrary_library() {
     verifyNoTestUnitErrors = false;
     putTestLibrary(r'''
 main() {
   int unusedVar = 42;
 }
 ''');
     List<AnalysisError> computedErrors = context.computeErrors(testSource);
     cache.putSourceErrorsInLibrary(testSource, testSource, computedErrors);
     List<AnalysisError> readErrors =
@@ skipping 84 matching lines @@
   @override
   List<int> get(String key) {
     return map[key];
   }
 
   @override
   void put(String key, List<int> bytes) {
     map[key] = bytes;
   }
 }