Replace using MockSdk with FolderBasedDartSdk + summaries in AbstractContextTest(s).

pkg/analysis_server/test/services/dependencies/reachable_source_collector_test.dart

Index: pkg/analysis_server/test/services/dependencies/reachable_source_collector_test.dart
diff --git a/pkg/analysis_server/test/services/dependencies/reachable_source_collector_test.dart b/pkg/analysis_server/test/services/dependencies/reachable_source_collector_test.dart
index 23eaf323dc36cb47ad7465216b7d44818a63420b..94874f958ee1271d409146774493f45faaaa50a3 100644
--- a/pkg/analysis_server/test/services/dependencies/reachable_source_collector_test.dart
+++ b/pkg/analysis_server/test/services/dependencies/reachable_source_collector_test.dart
@@ -48,37 +48,28 @@ import "dart:html";''');
     Source lib3 = addSource('/lib3.dart', 'import "lib4.dart";');
     addSource('/lib4.dart', 'import "lib3.dart";');
 
-    Map<String, List<String>> imports = importsFor(lib1);
-
-    // Verify keys.
-    expect(
-        imports.keys,
-        unorderedEquals([
-          'dart:_internal',
-          'dart:async',
-          'dart:core',
-          'dart:html',
-          'dart:math',
-          'file:///lib1.dart',
-          'file:///lib2.dart',
-        ]));
-    // Values.
-    expect(imports['file:///lib1.dart'],
-        unorderedEquals(['dart:core', 'dart:html', 'file:///lib2.dart']));
+    {
+      Map<String, List<String>> imports = importsFor(lib1);
+      expect(imports.keys, contains('file:///lib1.dart'));
+      expect(imports.keys, contains('file:///lib2.dart'));
+      expect(imports.keys, contains('dart:core'));
+      expect(imports.keys, contains('dart:html'));
+      expect(imports.keys, contains('dart:math'));
+      expect(imports.keys, isNot(contains('file:///lib3.dart')));
+      expect(imports['file:///lib1.dart'],
+          unorderedEquals(['dart:core', 'dart:html', 'file:///lib2.dart']));
+    }
 
     // Check transitivity.
     expect(importsFor(lib2).keys, contains('dart:html'));
 
     // Cycles should be OK.
-    expect(
-        importsFor(lib3).keys,
-        unorderedEquals([
-          'dart:_internal',
-          'dart:async',
-          'dart:core',
-          'dart:math',
-          'file:///lib3.dart',
-          'file:///lib4.dart'
-        ]));
+    {
+      Map<String, List<String>> imports = importsFor(lib3);
+      expect(imports.keys, contains('file:///lib3.dart'));
+      expect(imports.keys, contains('file:///lib4.dart'));
+      expect(imports.keys, contains('dart:core'));
+      expect(imports.keys, contains('dart:math'));
+    }
   }
 }