anchor.diff:      assertElement(findNode.simple('y;'), yElement);
     }
   
  -  test_compound_assignment_of_unresolved_name() async {
  +  test_compound_assignment_to_unresolved_name() async {
       addTestFile('''
   f(int y) {
     x += y;
  
positive.code:     assertElement(findNode.simple('x;'), xElement);
    }
  
    test_assignment_to_prefix() async {
      var a = _p('/test/lib/a.dart');
      provider.newFile(a, '''
  
negative.code:     }
    }
  
    test_assignment_to_final_parameter() async {
      addTestFile('''
  f(final int x) {
  