Associate excludes with context data.

pkg/analyzer/test/src/task/options_test.dart

Index: pkg/analyzer/test/src/task/options_test.dart
diff --git a/pkg/analyzer/test/src/task/options_test.dart b/pkg/analyzer/test/src/task/options_test.dart
index f65c3fb8076e2f3698b32122a4fb6539906876f8..a0cbca824f8eeb959087167b8192c04ea3c27cf6 100644
--- a/pkg/analyzer/test/src/task/options_test.dart
+++ b/pkg/analyzer/test/src/task/options_test.dart
@@ -7,6 +7,7 @@ library analyzer.test.src.task.options_test;
 import 'package:analyzer/analyzer.dart';
 import 'package:analyzer/source/analysis_options_provider.dart';
 import 'package:analyzer/source/error_processor.dart';
+import 'package:analyzer/src/context/context.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/task/options.dart';
@@ -128,6 +129,18 @@ analyzer:
     expect(unusedLocal.severity, ErrorSeverity.ERROR);
   }
 
+  test_configure_excludes() {
+    configureContext('''
+analyzer:
+  exclude:
+    - foo/bar.dart
+    - 'test/**'
+''');
+
+    List<String> excludes = context.getConfigurationData(CONTEXT_EXCLUDES);
+    expect(excludes, unorderedEquals(['foo/bar.dart', 'test/**']));
+  }
+
   test_configure_strong_mode() {
     configureContext('''
 analyzer: