add completion in type argument list

pkg/analysis_server/test/services/completion/completion_target_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.completion.target;
 
 import 'package:analysis_server/src/services/completion/completion_target.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:unittest/unittest.dart';
@@ skipping 47 matching lines @@
     addTestSource('main() {new Foo(^)}');
     assertTarget(')', '()', argIndex: 0);
   }
 
   test_ArgumentList_InstanceCreationExpression_functionArg2() {
     // ArgumentList  InstanceCreationExpression  Block
     addTestSource('main() {new B(^)} class B{B(f()){}}');
     assertTarget(')', '()', argIndex: 0, isFunctionalArgument: true);
   }
 
+  test_TypeArgumentList() {
+    // SimpleIdentifier  BinaryExpression  ExpressionStatement
+    addTestSource('main() { C<^> c; }');
+    assertTarget('', 'C < ');
+  }
+
+  test_TypeArgumentList2() {
+    // TypeName  TypeArgumentList  TypeName
+    addTestSource('main() { C<C^> c; }');
+    assertTarget('C', '<C>');
+  }
+
   test_ArgumentList_MethodInvocation() {
     // ArgumentList  MethodInvocation  Block
     addTestSource('main() {foo(^)}');
     assertTarget(')', '()', argIndex: 0);
   }
 
   test_ArgumentList_MethodInvocation2() {
     // ArgumentList  MethodInvocation  Block
     addTestSource('main() {foo(^n)}');
     assertTarget('n', '(n)', argIndex: 0);
@@ skipping 382 matching lines @@
     addTestSource('main() {int b^ = 1;}');
     assertTarget('b = 1', 'int b = 1');
   }
 
   test_VariableDeclaration_lhs_identifier_before() {
     // VariableDeclaration  VariableDeclarationList
     addTestSource('main() {int ^b = 1;}');
     assertTarget('b = 1', 'int b = 1');
   }
 }