Language/Expressions/Strings/implement_class_string_t01.dart

// Copyright (c) 2011, 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 All string literals implement the built-in class String.
/// @description Checks that string literals implement class String.
/// @author msyabro

import '../../../Utils/expect.dart';

main() {
  Expect.isTrue("" is String);
  Expect.isTrue('' is String);
  Expect.isTrue(r"" is String);
  Expect.isTrue(r'' is String);
  Expect.isTrue("""""" is String);
  Expect.isTrue('''''' is String);
  Expect.isTrue(r"""""" is String);
  Expect.isTrue(r'''''' is String);
  Expect.runtimeIsType<String>("");
  Expect.runtimeIsType<String>('');
  Expect.runtimeIsType<String>(r"");
  Expect.runtimeIsType<String>(r'');
  Expect.runtimeIsType<String>("""""");
  Expect.runtimeIsType<String>('''''');
  Expect.runtimeIsType<String>(r"""""");
  Expect.runtimeIsType<String>(r'''''');

  Expect.isTrue("String" is String);
  Expect.isTrue('\x00\x01\x02' is String);
  Expect.isTrue(r"\\\\\\\\" is String);
  Expect.isTrue(r'$$$$$' is String);
  Expect.isTrue("""
                new line """ is String);
  Expect.runtimeIsType<String>("String");
  Expect.runtimeIsType<String>('\x00\x01\x02');
  Expect.runtimeIsType<String>(r"\\\\\\\\");
  Expect.runtimeIsType<String>(r'$$$$$');
  Expect.runtimeIsType<String>("""
                new line """);
}