Introduce language test for bug #25525

tests/language/conflicting_type_variable_and_setter_test.dart

Index: tests/language/conflicting_type_variable_and_setter_test.dart
diff --git a/tests/language/type_variable_closure3_test.dart b/tests/language/conflicting_type_variable_and_setter_test.dart
similarity index 62%
copy from tests/language/type_variable_closure3_test.dart
copy to tests/language/conflicting_type_variable_and_setter_test.dart
index ecb1c39e82ed81cc01dd061dca2b5070890f985b..2aca0c32b659b1f1f213c4744ab50c6753befbbc 100644
--- a/tests/language/type_variable_closure3_test.dart
+++ b/tests/language/conflicting_type_variable_and_setter_test.dart
@@ -4,15 +4,16 @@
 
 import "package:expect/expect.dart";
 
-class A<T> {}
-
-class C<T> {
-  a() {
-    return () => new A<T>();
+class C<D> {
+  void set D(int value) {
+    field = value;
   }
+
+  int field;
 }
 
 main() {
-  Expect.isTrue(new C<int>().a()() is A<int>);
-  Expect.isFalse(new C<int>().a()() is A<String>);
+  C<int> c = new C<int>();
+  c.D = 1;
+  Expect.equals(c.field, 1);
 }