Issue 24566. Main AnalysisContext.getLibrariesContaining() should work also for SDK sources.

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

Index: pkg/analyzer/test/src/context/context_test.dart
diff --git a/pkg/analyzer/test/src/context/context_test.dart b/pkg/analyzer/test/src/context/context_test.dart
index 8875d92b09d0d63f933620b11bac97f93f33b873..554bc0a544c6e88655e2925e93789702ebd3783c 100644
--- a/pkg/analyzer/test/src/context/context_test.dart
+++ b/pkg/analyzer/test/src/context/context_test.dart
@@ -1209,13 +1209,23 @@ Stream S = null;
     // must be from SDK context
     AnalysisContext sdkContext = context.sourceFactory.dartSdk.context;
     expect(sdkContext, streamElement.context);
-    // must be in the "async" library
     Source intSource = streamElement.source;
-    List<Source> coreLibraries = sdkContext.getLibrariesContaining(intSource);
-    expect(coreLibraries, hasLength(1));
-    Source coreSource = coreLibraries[0];
-    expect(coreSource.isInSystemLibrary, isTrue);
-    expect(coreSource.shortName, 'async.dart');
+    // must be in the "async" library - SDK context
+    {
+      List<Source> coreLibraries = sdkContext.getLibrariesContaining(intSource);
+      expect(coreLibraries, hasLength(1));
+      Source coreSource = coreLibraries[0];
+      expect(coreSource.isInSystemLibrary, isTrue);
+      expect(coreSource.shortName, 'async.dart');
+    }
+    // must be in the "async" library - main context
+    {
+      List<Source> coreLibraries = context.getLibrariesContaining(intSource);
+      expect(coreLibraries, hasLength(1));
+      Source coreSource = coreLibraries[0];
+      expect(coreSource.isInSystemLibrary, isTrue);
+      expect(coreSource.shortName, 'async.dart');
+    }
   }
 
   void test_getLineInfo() {