LibTest/core/StringBuffer/isNotEmpty_A01_t01.dart

// Copyright (c) 2017, 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 final bool isNotEmpty
/// Returns whether the buffer is not empty. This is a constant-time operation.
/// @description Checks that this method returns true if the buffer is not empty
/// and false otherwise
/// @author sgrekhov@unipro.ru

import "../../../Utils/expect.dart";

main() {
  StringBuffer sb = new StringBuffer();
  Expect.isFalse(sb.isNotEmpty);
  Expect.isFalse((sb..write("")).isNotEmpty);
  Expect.isTrue((sb..write(null)).isNotEmpty);
  Expect.isFalse((sb..clear()).isNotEmpty);
  Expect.isTrue((sb..write("abc")).isNotEmpty);
}