Quick Assist to add explicit types to formal parameters.

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

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library test.services.correction.assist;
 
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/correction/assist.dart';
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/index/local_memory_index.dart';
@@ skipping 513 matching lines @@
   void test_addTypeAnnotation_local_wrong_unknown() {
     verifyNoTestUnitErrors = false;
     _indexTestUnit('''
 main() {
   var v = unknownVar;
 }
 ''');
     assertNoAssistAt('var ', AssistKind.ADD_TYPE_ANNOTATION);
   }
 
+  void test_addTypeAnnotation_parameter_BAD_hasExplicitType() {
+    _indexTestUnit('''
+foo(f(int p)) {}
+main() {
+  foo((num test) {});
+}
+''');
+    assertNoAssistAt('test', AssistKind.ADD_TYPE_ANNOTATION);
+  }
+
+  void test_addTypeAnnotation_parameter_BAD_noPropagatedType() {
+    _indexTestUnit('''
+foo(f(p)) {}
+main() {
+  foo((test) {});
+}
+''');
+    assertNoAssistAt('test', AssistKind.ADD_TYPE_ANNOTATION);
+  }
+
+  void test_addTypeAnnotation_parameter_OK() {
+    _indexTestUnit('''
+foo(f(int p)) {}
+main() {
+  foo((test) {});
+}
+''');
+    assertHasAssistAt('test', AssistKind.ADD_TYPE_ANNOTATION, '''
+foo(f(int p)) {}
+main() {
+  foo((int test) {});
+}
+''');
+  }
+
   void test_addTypeAnnotation_topLevelField_OK_int() {
     _indexTestUnit('''
 var V = 0;
 ''');
     assertHasAssistAt('var ', AssistKind.ADD_TYPE_ANNOTATION, '''
 int V = 0;
 ''');
   }
 
   void test_addTypeAnnotation_topLevelField_wrong_multiple() {
@@ skipping 2083 matching lines @@
   void _indexTestUnit(String code) {
     resolveTestUnit(code);
     index.indexUnit(context, testUnit);
   }
 
   void _setStartEndSelection() {
     offset = findOffset('// start\n') + '// start\n'.length;
     length = findOffset('// end') - offset;
   }
 }