LibTest/core/List/lastIndexOf_A01_t01.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.

// @dart = 2.9

/// @assertion abstract int lastIndexOf(E element, [int start])
/// Returns the last index of element in the list.
/// Searches the list backwards from index start to 0.
/// The first time an element e is encountered so that e == element,
/// the index of e is returned.
/// @description Checks that the correct index is returned, if the element is
/// present in the list.
/// @author iefremov

library lastIndexOf_A01_t01;

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

void check(List a) {
  Expect.isTrue(a.lastIndexOf(42, 0) == 0);
  Expect.isTrue(a.lastIndexOf(0, 6) == 6);
  Expect.isTrue(a.lastIndexOf(42, 5) == 3);
  Expect.isTrue(a.lastIndexOf(42, 3) == 3);
  Expect.isTrue(a.lastIndexOf(42, 2) == 0);
  Expect.isTrue(a.lastIndexOf(6031769, 5) == 5);
  Expect.isTrue(a.lastIndexOf(6031769, 6) == 5);
  Expect.isTrue(a.lastIndexOf(0, 1) == 1);
  Expect.isTrue(a.lastIndexOf(0, 2) == 1);
  Expect.isTrue(a.lastIndexOf(0, 5) == 1);
  Expect.isTrue(a.lastIndexOf(0, 6) == 6);
}

test(List create([int length])) {
  List a = create();
  a.addAll(const [42, 0, -1, 42, -1, 6031769, 0]);
  check(a);

  List b = create(a.length);
  b.setRange(0, a.length, a);
  check(b);
}