LibTest/core/List/indexOf_A02_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.

/// @assertion abstract int indexOf(E element, [int start = 0])
/// There is no restriction on the value of [startIndex]. 
/// If it is negative, it has the same effect as if it were zero: this entire list may be searched. 
/// If it is greater than the [:length:] of this list, it has the same effect 
/// as if it were equal to the [:length:]: -1 is returned.
/// @note undocumented
/// @description Checks that [startIndex] can be out of bounds.
/// @author iefremov
/// @author varlax

library indexOf_A02_t01;

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

checkList(List list, var elem, int idx, int expected) {
  Expect.equals(expected, list.indexOf(elem, idx));
}

check(List ls) {
  checkList(ls, 42, -1, 0);
  checkList(ls, 777, -1, -1);
  checkList(ls, null, -1, -1);
  checkList(ls, 0, -1, 1);

  checkList(ls, 42, 7, -1);
  checkList(ls, 777, 7, -1);
  checkList(ls, null, 7, -1);
  checkList(ls, 0, 7, -1);

  checkList(ls, 42, 6031769, -1);
  checkList(ls, 777, 6031769, -1);
  checkList(ls, null, 6031769, -1);
  checkList(ls, 0, 6031769, -1);

  checkList(ls, 42, -6031769, 0);
  checkList(ls, 777, -6031769, -1);
  checkList(ls, null, -6031769, -1);
  checkList(ls, 0, -6031769, 1);
}

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

  check(a);

  List b = create(a.length, 0);
  for(var i = 0; i<a.length; i++) {
    b[i] = a[i];
  }
  check(b);
}