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

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

 // Copyright (c) 2015, 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.
 
 library test.services.dependencies.import_collector;
 
 import 'package:analysis_server/src/services/dependencies/reachable_source_collector.dart';
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:test/test.dart';
@@ skipping 30 matching lines @@
     Source lib1 = addSource(
         '/lib1.dart',
         '''
 import "lib2.dart";
 import "dart:html";''');
     Source lib2 = addSource('/lib2.dart', 'import "lib1.dart";');
 
     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'));
+    }
   }
 }