LibTest/core/List/operator_subscript_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 abstract E operator [](int index)
/// Returns the element at the given index in the list.
/// @description Checks fixed size arrays.
/// @author iefremov

library operator_subscript_A01_t01;

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

test(List<E> create<E>([int length, E fill])) {
  List from(List content) {
    List res = create(content.length, 0);
    res.setRange(0, content.length, content);
    return res;
  }
  
  Expect.isTrue(from([1])[0] == 1);
  var a = [];
  Expect.identical(from([a])[0], a);
  Expect.identical(from([null])[0], null);
  Expect.isTrue(from(const<int>[1, 2, 3])[0] == 1);
  Expect.isTrue(from([null, null, null])[0] == null);

  Expect.identical(from([1, 2, 3])[0], 1);
  Expect.identical(from([1, null, 3])[1], null);
  Expect.identical(from([1, 2, null])[2], null);
  
  a = const [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17];
  List ls = new List<int>.filled(a.length, 0);
  for (int i in a) {
    Expect.identical(a[i], i);
    ls[i] = a[i];
  }
  for(int i = 0; i < a.length; ++i) {
    Expect.identical(ls[i], i);
    Expect.identical(ls[a.length - 1 - i], a.length - 1 - i);
  }
}