integrate analysis options include directive into context builder

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 b05daa5240fa47b4906d6e9560c70d844c250714..8a40454ad61b73cee2dfae54efb98a382a449f15 100644
--- a/pkg/analyzer/test/src/context/builder_test.dart
+++ b/pkg/analyzer/test/src/context/builder_test.dart
@@ -555,6 +555,63 @@ analyzer:
     }
   }
 
+  void test_getAnalysisOptions_includes() {
+    AnalysisOptionsImpl defaultOptions = new AnalysisOptionsImpl();
+    defaultOptions.enableGenericMethods = true;
+    builderOptions.defaultOptions = defaultOptions;
+    AnalysisOptionsImpl expected = new AnalysisOptionsImpl();
+    expected.enableSuperMixins = true;
+    expected.enableGenericMethods = true;
+    resourceProvider.newFile(
+        resourceProvider.convertPath('/mypkgs/somepkg/lib/here.yaml'),
+        '''
+two: {boo: newt}
+''');
+    String path = resourceProvider.convertPath('/some/directory/path');
+    resourceProvider.newFile(
+        pathContext.join(path, '.packages'),
+        '''
+somepkg:/mypkgs/somepkg/lib
+''');
+    resourceProvider.newFile(
+        pathContext.join(path, 'bar.yaml'),
+        '''
+include: package:somepkg/here.yaml
+foo: {bar: baz}
+''');
+    String filePath =
+        pathContext.join(path, AnalysisEngine.ANALYSIS_OPTIONS_YAML_FILE);
+    resourceProvider.newFile(
+        filePath,
+        '''
+include: bar.yaml
+analyzer:
+  language:
+    enableSuperMixins : true
+''');
+
+    AnalysisEngine engine = AnalysisEngine.instance;
+    OptionsPlugin plugin = engine.optionsPlugin;
+    plugin.registerExtensionPoints((_) {});
+    try {
+      _TestOptionsProcessor processor = new _TestOptionsProcessor();
+      processor.expectedOptions = <String, Object>{
+        'analyzer': {
+          'language': {'enableSuperMixins': true}
+        },
+        'foo': {'bar': 'baz'},
+        'two': {'boo': 'newt'},
+      };
+      (plugin.optionsProcessorExtensionPoint as ExtensionPointImpl)
+          .add(processor);
+      AnalysisContext context = engine.createAnalysisContext();
+      AnalysisOptions options = builder.getAnalysisOptions(context, path);
+      _expectEqualOptions(options, expected);
+    } finally {
+      plugin.registerExtensionPoints((_) {});
+    }
+  }
+
   void test_getAnalysisOptions_invalid() {
     String path = resourceProvider.convertPath('/some/directory/path');
     String filePath =