tests/language_2/const_string_test.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.

import "package:expect/expect.dart";

// Exercises compile-time string constants

const yz = "y" + "z";

main() {
  // Constant comparisons are independent of the quotes used.
  Expect.isTrue(identical("abcd", 'abcd'));
  Expect.isTrue(identical('abcd', "abcd"));
  Expect.isTrue(identical("ab\"cd", 'ab"cd'));
  Expect.isTrue(identical('ab\'cd', "ab'cd"));

  // String concatenation works even when quotes are different.
  Expect.isTrue(identical("abcd", "ab" "cd"));
  Expect.isTrue(identical("abcd", "ab" 'cd'));
  Expect.isTrue(identical("abcd", 'ab' 'cd'));
  Expect.isTrue(identical("abcd", 'ab' "cd"));

  // Or when there are more than 2 contatenations.
  Expect.isTrue(identical("abcd", "a" "b" "cd"));
  Expect.isTrue(identical("abcd", "a" "b" "c" "d"));
  Expect.isTrue(identical('abcd', 'a' 'b' 'c' 'd'));
  Expect.isTrue(identical("abcd", "a" "b" 'c' "d"));
  Expect.isTrue(identical("abcd", 'a' 'b' 'c' 'd'));
  Expect.isTrue(identical("abcd", 'a' "b" 'c' "d"));

  Expect.isTrue(identical("a'b'cd", "a" "'b'" 'c' "d"));
  Expect.isTrue(identical("a\"b\"cd", "a" '"b"' 'c' "d"));
  Expect.isTrue(identical("a\"b\"cd", "a" '"b"' 'c' "d"));
  Expect.isTrue(identical("a'b'cd", 'a' "'b'" 'c' "d"));
  Expect.isTrue(identical('a\'b\'cd', "a" "'b'" 'c' "d"));
  Expect.isTrue(identical('a"b"cd', 'a' '"b"' 'c' "d"));
  Expect.isTrue(identical("a\"b\"cd", 'a' '"b"' 'c' "d"));

  const a = identical("ab", "a" + "b");
  Expect.isTrue(a);

  const b = identical("xyz", "x" + yz);
  Expect.isTrue(b);

  const c = identical("12", "1" "2");
  Expect.isTrue(c);

  const d = identical("zyz", "z$yz");
  Expect.isTrue(d);
}