LanguageFeatures/nnbd/runtime_equality_operator_A01_t01.dart

// Copyright (c) 2021, 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.

/// @assertion Two objects T1 and T2 which are instances of Type (that is,
/// runtime type objects) are considered equal if and only if the runtime type
/// objects T1 and T2 corresponds to the types S1 and S2 respectively, and the
/// normal forms NORM(S1) and NORM(S2) are syntactically equal up to equivalence
/// of bound variables and ignoring * modifiers on types.
///
/// @description Checks that runtime type of objects T1 and T2 are equal if and
/// only if the runtime type objects T1 and T2 corresponds to the types S1 and S2
/// respectively, and the normal forms NORM(S1) and NORM(S2) are syntactically
/// equal
///
/// @author sgrekhov@unipro.ru

// Requirements=nnbd-strong
import "../../Utils/expect.dart";

main() {
  int i1 = 42;
  int i2 = 0;
  int? i3 = 11;

  Expect.equals(i1.runtimeType, i2.runtimeType);
  Expect.equals(i1.runtimeType, i3.runtimeType);

  i3 = null;
  Expect.notEquals(i1.runtimeType, i3.runtimeType);
}