Add a failing test for generic tear-offs

pkg/analyzer/test/generated/static_warning_code_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 analyzer.test.generated.static_warning_code_test;
 
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:unittest/unittest.dart';
 
 import '../reflective_tests.dart';
 import '../utils.dart';
 import 'resolver_test_case.dart';
 
 main() {
   initializeTestEnvironment();
   runReflectiveTests(StaticWarningCodeTest);
 }
 
 @reflectiveTest
 class StaticWarningCodeTest extends ResolverTestCase {
+  void fail_argumentTypeNotAssignable_tearOff_required() {
+    Source source = addSource(r'''
+class C {
+  Object/*=T*/ f/*<T>*/(Object/*=T*/ x) => x;
+}
+g(C c) {
+  var h = c.f/*<int>*/;
+  print(h('s'));
+}
+''');
+    computeLibrarySourceErrors(source);
+    assertErrors(source, [StaticWarningCode.ARGUMENT_TYPE_NOT_ASSIGNABLE]);
+    verify([source]);
+  }
+
   void fail_undefinedGetter() {
     Source source = addSource(r'''
 ''');
     computeLibrarySourceErrors(source);
     assertErrors(source, [StaticWarningCode.UNDEFINED_GETTER]);
     verify([source]);
   }
 
   void fail_undefinedIdentifier_commentReference() {
     Source source = addSource(r'''
@@ skipping 3609 matching lines @@
 
   void test_voidReturnForGetter() {
     Source source = addSource(r'''
 class S {
   void get value {}
 }''');
     computeLibrarySourceErrors(source);
     assertErrors(source, [StaticWarningCode.VOID_RETURN_FOR_GETTER]);
   }
 }