Add source kind to the incremental cache.

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

Index: pkg/analyzer/test/src/summary/incremental_cache_test.dart
diff --git a/pkg/analyzer/test/src/summary/incremental_cache_test.dart b/pkg/analyzer/test/src/summary/incremental_cache_test.dart
index 99ab3d3ba2c7064bfa6f970a828bd81ea93ad9b8..5824cd3c3f14cfea59e8c139e8d4c41d1503d2b3 100644
--- a/pkg/analyzer/test/src/summary/incremental_cache_test.dart
+++ b/pkg/analyzer/test/src/summary/incremental_cache_test.dart
@@ -3,6 +3,7 @@
 // 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';
@@ -30,6 +31,32 @@ class LibraryBundleCacheTest extends AbstractSingleUnitTest {
     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
@@ -37,15 +64,19 @@ class LibraryBundleCacheTest extends AbstractSingleUnitTest {
     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() {
@@ -63,6 +94,17 @@ main() {}
     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);