Implemented analysis.setPrioritySource

pkg/analysis_server/test/protocol_test.dart

Index: pkg/analysis_server/test/protocol_test.dart
diff --git a/pkg/analysis_server/test/protocol_test.dart b/pkg/analysis_server/test/protocol_test.dart
index 293bdd274d1bb631f17e4e16792cdf6e732faf44..36bf1a2df5d2757cb7a9bbde8150b82379914c96 100644
--- a/pkg/analysis_server/test/protocol_test.dart
+++ b/pkg/analysis_server/test/protocol_test.dart
@@ -528,6 +528,17 @@ class ResponseTest {
   }
 
   @runTest
+  static void create_unanalyzedPriorityFiles() {
+    Response response = new Response.unanalyzedPriorityFiles(new Request('0', ''), 'file list');
+    expect(response.id, equals('0'));
+    expect(response.error, isNotNull);
+    expect(response.toJson(), equals({
+      Response.ID: '0',
+      Response.ERROR: {'code': -11, 'message': "Unanalyzed files cannot be a priority: 'file list'"}
+    }));
+  }
+
+  @runTest
   static void setResult() {
     String resultName = 'name';
     String resultValue = 'value';