anchor.diff:      expect(closureElement.enclosingElement, same(variableInitializer));
     }
   
  -  test_compound_assignment_of_postfix_increment() async {
  +  test_compound_assignment_to_postfix_increment() async {
       addTestFile('''
   f(int x, int y) {
     x++ += y;
  
positive.code:     }
    }
  
    test_assignment_of_postfix_increment() async {
      addTestFile('''
  f(int x, int y) {
    x++ = y;
  }
  ''');
      await resolveTestFile();
      expect(result.errors, isNotEmpty);
      var xElement = findElement.parameter('x');
      assertElement(findNode.simple('x++'), xElement);
      var yElement = findElement.parameter('y');
      assertElement(findNode.simple('y;'), yElement);
    }
  
    test_assignment_of_unresolved_name() async {
      addTestFile('''
  f(int y) {
    x = y;
  }
  ''');
      await resolveTestFile();
      expect(result.errors, isNotEmpty);
      var yElement = findElement.parameter('y');
      assertElement(findNode.simple('y;'), yElement);
    }
  
    test_assignment_to_final_parameter() async {
      addTestFile('''
  f(final int x) {
  
negative.code:     assertElement(findNode.simple('y;'), yElement);
    }
  
    test_compound_assignment_to_unresolved_name() async {
      addTestFile('''
  f(int y) {
    x += y;
  