Possible fix for 28038

pkg/analyzer/test/src/context/builder_test.dart

Index: pkg/analyzer/test/src/context/builder_test.dart
diff --git a/pkg/analyzer/test/src/context/builder_test.dart b/pkg/analyzer/test/src/context/builder_test.dart
index e533467ed64750d7ba2e0777a106cfb66d9c45f5..fab9f18e70c1ee15cc07c872a2b4f7493f8a0716 100644
--- a/pkg/analyzer/test/src/context/builder_test.dart
+++ b/pkg/analyzer/test/src/context/builder_test.dart
@@ -6,6 +6,7 @@ library analyzer.test.src.context.context_builder_test;
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
+import 'package:analyzer/source/package_map_resolver.dart';
 import 'package:analyzer/src/command_line/arguments.dart';
 import 'package:analyzer/src/context/builder.dart';
 import 'package:analyzer/src/context/source.dart';
@@ -331,6 +332,25 @@ bar:$barUri
         contains(predicate((r) => r is BazelPackageUriResolver)));
   }
 
+  void test_createSourceFactory_bazelWorkspace_withPackagesFile() {
+    String _p(String path) => resourceProvider.convertPath(path);
+
+    String projectPath = _p('/workspace/my/module');
+    resourceProvider.newFile(_p('/workspace/WORKSPACE'), '');
+    resourceProvider.newFolder(_p('/workspace/bazel-bin'));
+    resourceProvider.newFolder(_p('/workspace/bazel-genfiles'));
+    resourceProvider.newFolder(projectPath);
+    resourceProvider.newFile(_p(path.join(projectPath, '.packages')), '');
+
+    AnalysisOptionsImpl options = new AnalysisOptionsImpl();
+    SourceFactoryImpl factory =
+        builder.createSourceFactory(projectPath, options);
+    expect(factory.resolvers,
+        contains(predicate((r) => r is ResourceUriResolver)));
+    expect(factory.resolvers,
+        contains(predicate((r) => r is PackageMapUriResolver)));
+  }
+
   void test_createSourceFactory_noProvider_packages_embedder_extensions() {
     String rootPath = resourceProvider.convertPath('/root');
     Folder rootFolder = resourceProvider.getFolder(rootPath);