tests/corelib/from_environment_default_value_test.dart

// Copyright (c) 2020, 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";

main() {
  // Verify that the default value is as expected.
  Expect.equals(false, const bool.fromEnvironment('UNDEFINED_NAME'));
  Expect.equals(0, const int.fromEnvironment('UNDEFINED_NAME'));
  Expect.equals('', const String.fromEnvironment('UNDEFINED_NAME'));

  // Verify that `defaultValue` is used when passed, not the default values.
  Expect.equals(
    true,
    const bool.fromEnvironment('UNDEFINED_NAME', defaultValue: true),
  );
  Expect.equals(
    1,
    const int.fromEnvironment('UNDEFINED_NAME', defaultValue: 1),
  );
  Expect.equals(
    'qux',
    const String.fromEnvironment('UNDEFINED_NAME', defaultValue: 'qux'),
  );
}