Add the analysis options path to the diagnostics page.

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 431c6fde99be5e0660cfa91e9e8869445c11fa84..9dfd14eba9f1dcfcc92fc1a5cfc994bda449a508 100644
--- a/pkg/analyzer/test/src/context/builder_test.dart
+++ b/pkg/analyzer/test/src/context/builder_test.dart
@@ -4,6 +4,7 @@
 
 library analyzer.test.src.context.context_builder_test;
 
+import 'package:analyzer/context/context_root.dart';
 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';
@@ -892,6 +893,23 @@ linter:
     _expectEqualOptions(options, new AnalysisOptionsImpl());
   }
 
+  void test_getAnalysisOptions_optionsPath() {
+    String path = resourceProvider.convertPath('/some/directory/path');
+    String filePath =
+        pathContext.join(path, AnalysisEngine.ANALYSIS_OPTIONS_YAML_FILE);
+    resourceProvider.newFile(
+        filePath,
+        '''
+linter:
+  rules:
+    - empty_constructor_bodies
+''');
+
+    ContextRoot root = new ContextRoot(path, []);
+    builder.getAnalysisOptions(path, contextRoot: root);
+    expect(root.optionsFilePath, equals(filePath));
+  }
+
   void test_getAnalysisOptions_noDefault_overrides() {
     AnalysisOptionsImpl expected = new AnalysisOptionsImpl();
     expected.enableSuperMixins = true;