LibTest/core/List/insertAll_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 insertAll(int index, Iterable<E> iterable)
 * Inserts all elements of iterable at position index in the list.
 * This increases the length of the list by the length of iterable and shifts all
 * later elements towards the end of the list.
 * @description Checks that the elements from iterable are inserted.
 * @author kaigorodov
 */
library insertAll_A01_t01;

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

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

test(List create([int length])) {
  List a0=[1,3,3,4,5,6];
  List a = create();
  a.insertAll(0, a0);
  check(a, 0, [10,20,33]);
  check(a, 3, [-10,20,33]);
  check(a, a0.length-1, [10,null,33]);
  check(a, a0.length, [10,20,-33,null]);
}