Add some corner cases for resynthesis of field formal parameters.

pkg/analyzer/test/src/summary/resynthesize_test.dart

 // Copyright (c) 2015, 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.src.serialization.elements_test;
 
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/summary/base.dart';
 import 'package:analyzer/src/summary/format.dart';
@@ skipping 576 matching lines @@
   }
 
   test_class_constructor_external() {
     checkLibrary('class C { external C(); }');
   }
 
   test_class_constructor_factory() {
     checkLibrary('class C { factory C() => null; }');
   }
 
+  test_class_constructor_field_formal_dynamic_dynamic() {
+    checkLibrary('class C { dynamic x; C(dynamic this.x); }');
+  }
+
+  test_class_constructor_field_formal_dynamic_typed() {
+    checkLibrary('class C { dynamic x; C(int this.x); }');
+  }
+
+  test_class_constructor_field_formal_dynamic_untyped() {
+    checkLibrary('class C { dynamic x; C(this.x); }');
+  }
+
+  test_class_constructor_field_formal_typed_dynamic() {
+    checkLibrary('class C { num x; C(dynamic this.x); }');
+  }
+
+  test_class_constructor_field_formal_typed_typed() {
+    checkLibrary('class C { num x; C(int this.x); }');
+  }
+
+  test_class_constructor_field_formal_typed_untyped() {
+    checkLibrary('class C { num x; C(this.x); }');
+  }
+
+  test_class_constructor_field_formal_untyped_dynamic() {
+    checkLibrary('class C { var x; C(dynamic this.x); }');
+  }
+
+  test_class_constructor_field_formal_untyped_typed() {
+    checkLibrary('class C { var x; C(int this.x); }');
+  }
+
+  test_class_constructor_field_formal_untyped_untyped() {
+    checkLibrary('class C { var x; C(this.x); }');
+  }
+
   test_class_constructor_implicit() {
     checkLibrary('class C {}');
   }
 
   test_class_constructor_implicit_type_params() {
     checkLibrary('class C<T, U> {}');
   }
 
   test_class_constructor_params() {
     checkLibrary('class C { C(x, y); }');
@@ skipping 502 matching lines @@
   }
 
   test_variable_implicit_type() {
     checkLibrary('var x;');
   }
 
   test_variables() {
     checkLibrary('int i; int j;');
   }
 }