LibTest/core/Iterable/toList_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.

/// @assertion List<E> toList({bool growable: true})
/// Creates a List containing the elements of this Iterable.
/// The elements will be in iteration order. The list is fixed-length if growable
/// is false.
/// @description Checks that proper list with correct element order is created.
/// @author kaigorodov

library toList_A01_t01;
import "../../../Utils/expect.dart";

void checkEquals(Iterable expected, List actual) {
  Expect.equals(expected.length, actual.length);
  Iterator it = expected.iterator;
  var i = 0;
  while (it.moveNext()) {
    Object? o = it.current;
    Expect.identical(actual[i], o);
    Expect.isTrue(actual[i] == o);
    i++;
  }
}

test(Iterable create([Iterable content])) {
  Iterable l = create();
  List a = l.toList();
  Expect.equals(0, a.length);
  Expect.equals(0, l.length);

  l = create([1, 2, 3, 4, 5]);
  a = l.toList();
  checkEquals(l, a);

  Iterable src = create([null, [null], [], [1, 2, 3], [[null]]]);
  a = src.toList();
  checkEquals(src, a);

  List lst = new List.filled(34567, 0);
  lst[34566] = -111111111;
  src = create(lst);
  a = src.toList();
  checkEquals(src, a);
}