LibTest/core/List/insert_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 void insert(int index, E element)
 * Inserts the element at position index in the list.
 * This increases the length of the list by one and shifts all elements at
 * or after the index towards the end of the list.
 * @description Checks that the element at the index is set to the given element.
 * @author kaigorodov
 */
library insert_A01_t01;

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

void check(List a0, int index, var element) {
  List a=new List.from(a0);
  a.insert(index, element);
  Expect.equals(a0.length+1, a.length);
  for (int k=0; k<index; k++) {
    Expect.identical(a0[k], a[k]);
  }
  Expect.identical(element, a[index]);
  for (int k=index; k<a0.length; k++) {
    Expect.identical(a0[k], a[k+1]);
  }
}

test(List create([int length])) {
  List a0=[1,3,3,4,5,6];
  List a = create();
  a.insertAll(0, a0);
  check(a, 0, -1);
  check(a, 3, -2);
  check(a, a.length-1, -3);
  check(a, a.length, -4);
}