Quick Fix for returning Future from 'async' functions.

pkg/analysis_server/test/services/correction/fix_test.dart

Index: pkg/analysis_server/test/services/correction/fix_test.dart
diff --git a/pkg/analysis_server/test/services/correction/fix_test.dart b/pkg/analysis_server/test/services/correction/fix_test.dart
index e62784207e308870bf1727b42bbcf61c22c20127..4608f6bd7520e5829a91554aae5ed2c2e35684f3 100644
--- a/pkg/analysis_server/test/services/correction/fix_test.dart
+++ b/pkg/analysis_server/test/services/correction/fix_test.dart
@@ -1736,6 +1736,71 @@ main() {
 ''');
   }
 
+  void test_illegalAsyncReturnType_asyncLibrary_import() {
+    errorFilter = (AnalysisError error) {
+      return error.errorCode == StaticTypeWarningCode.ILLEGAL_ASYNC_RETURN_TYPE;
+    };
+    resolveTestUnit('''
+library main;
+int main() async {
+}
+''');
+    assertHasFix(FixKind.REPLACE_RETURN_TYPE_FUTURE, '''
+library main;
+import 'dart:async';
+Future<int> main() async {
+}
+''');
+  }
+
+  void test_illegalAsyncReturnType_asyncLibrary_usePrefix() {
+    errorFilter = (AnalysisError error) {
+      return error.errorCode == StaticTypeWarningCode.ILLEGAL_ASYNC_RETURN_TYPE;
+    };
+    resolveTestUnit('''
+import 'dart:async' as al;
+int main() async {
+}
+''');
+    assertHasFix(FixKind.REPLACE_RETURN_TYPE_FUTURE, '''
+import 'dart:async' as al;
+al.Future<int> main() async {
+}
+''');
+  }
+
+  void test_illegalAsyncReturnType_complexTypeName() {
+    errorFilter = (AnalysisError error) {
+      return error.errorCode == StaticTypeWarningCode.ILLEGAL_ASYNC_RETURN_TYPE;
+    };
+    resolveTestUnit('''
+import 'dart:async';
+List<int> main() async {
+}
+''');
+    assertHasFix(FixKind.REPLACE_RETURN_TYPE_FUTURE, '''
+import 'dart:async';
+Future<List<int>> main() async {
+}
+''');
+  }
+
+  void test_illegalAsyncReturnType_void() {

[Brian Wilkerson, 2015/03/09 21:05:35]

Perhaps a test case containing:

import 'dart:async';
main() async {
}

to test the absence of a return type.

[scheglov, 2015/03/09 21:34:37]

Well, we don't report any error in this case.
So, we don't need a fix :-)

+    errorFilter = (AnalysisError error) {
+      return error.errorCode == StaticTypeWarningCode.ILLEGAL_ASYNC_RETURN_TYPE;
+    };
+    resolveTestUnit('''
+import 'dart:async';
+void main() async {
+}
+''');
+    assertHasFix(FixKind.REPLACE_RETURN_TYPE_FUTURE, '''
+import 'dart:async';
+Future main() async {
+}
+''');
+  }
+
   void test_importLibraryPackage_withClass() {
     _configureMyPkg('''
 library my_lib;