Add source kind to the 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/file_system/file_system.dart';
+import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/summary/idl.dart';
 import 'package:analyzer/src/summary/incremental_cache.dart';
 import 'package:unittest/unittest.dart';
 
 import '../../reflective_tests.dart';
 import '../abstract_single_unit.dart';
 
 main() {
   groupSep = ' | ';
   runReflectiveTests(LibraryBundleCacheTest);
 }
 
 /**
  * TODO(scheglov) write more tests for invalidation.
  */
 @reflectiveTest
 class LibraryBundleCacheTest extends AbstractSingleUnitTest {
   Folder cacheFolder;
   LibraryBundleCache cache;
 
   @override
   void setUp() {
     super.setUp();
     cacheFolder = resourceProvider.newFolder('/cache');
     cache = new LibraryBundleCache('pid.tmp', cacheFolder, context, <int>[]);
   }
 
+  void test_getSourceKind_library() {
+    resolveTestUnit(r'''
+main() {}
+''');
+    cache.putLibrary(testLibraryElement);
+    expect(cache.getSourceKind(testSource), SourceKind.LIBRARY);
+  }
+
+  void test_getSourceKind_notCached() {
+    resolveTestUnit(r'''
+main() {}
+''');
+    expect(cache.getSourceKind(testSource), isNull);
+  }
+
+  void test_getSourceKind_part() {
+    Source partSource = addSource('/foo.dart', 'part of lib;');
+    resolveTestUnit(r'''
+library lib;
+part 'foo.dart';
+''');
+    cache.putLibrary(testLibraryElement);
+    expect(cache.getSourceKind(testSource), SourceKind.LIBRARY);
+    expect(cache.getSourceKind(partSource), SourceKind.PART);
+  }
+
   void test_readBundle_emptyCache() {
     resolveTestUnit('main() {}');
     // the cache is empty, no bundle
     PackageBundle bundle = cache.readBundle(testSource);
     expect(bundle, isNull);
   }
 
-  void test_readBundle_importSdk() {
+  void test_readBundle_exportLib() {
+    addSource('/a.dart', '// 1');
     resolveTestUnit(r'''
-import 'dart:async';
+export 'a.dart';
 main() {}
 ''');
     cache.putLibrary(testLibraryElement);
     // has bundle
-    PackageBundle bundle = cache.readBundle(testSource);
-    expect(bundle, isNotNull);
+    expect(cache.readBundle(testSource), isNotNull);
+    // update a.dart, no bundle
+    cache.clearInternalCaches();
+    resourceProvider.updateFile('/a.dart', '// 2');
+    expect(cache.readBundle(testSource), isNull);
   }
 
   void test_readBundle_importLib() {
     addSource('/a.dart', '// 1');
     resolveTestUnit(r'''
 import 'a.dart';
 main() {}
 ''');
     cache.putLibrary(testLibraryElement);
     // has bundle
     expect(cache.readBundle(testSource), isNotNull);
     // update a.dart, no bundle
     cache.clearInternalCaches();
     resourceProvider.updateFile('/a.dart', '// 2');
     expect(cache.readBundle(testSource), isNull);
   }
 
+  void test_readBundle_importSdk() {
+    resolveTestUnit(r'''
+import 'dart:async';
+main() {}
+''');
+    cache.putLibrary(testLibraryElement);
+    // has bundle
+    PackageBundle bundle = cache.readBundle(testSource);
+    expect(bundle, isNotNull);
+  }
+
   void test_readBundle_withoutDependencies() {
     resolveTestUnit('main() {}');
     cache.putLibrary(testLibraryElement);
     // has bundle
     PackageBundle bundle = cache.readBundle(testSource);
     expect(bundle, isNotNull);
   }
 }