зеркало из https://github.com/mozilla/gecko-dev.git
97 строки
2.7 KiB
C++
97 строки
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsTPriorityQueue.h"
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#include <stdio.h>
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#include <stdlib.h>
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template<class T, class Compare>
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void
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CheckPopSequence(const nsTPriorityQueue<T, Compare>& aQueue,
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const T* aExpectedSequence, const PRUint32 aSequenceLength)
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{
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nsTPriorityQueue<T, Compare> copy(aQueue);
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for (PRUint32 i = 0; i < aSequenceLength; i++) {
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if (copy.IsEmpty()) {
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printf("Number of elements in the queue is too short by %d.\n",
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aSequenceLength - i);
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exit(-1);
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}
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T pop = copy.Pop();
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if (pop != aExpectedSequence[i]) {
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printf("Unexpected value in pop sequence at position %d\n", i);
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printf(" Sequence:");
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for (size_t j = 0; j < aSequenceLength; j++) {
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printf(" %d", aExpectedSequence[j]);
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if (j == i) {
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printf("**");
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}
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}
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printf("\n ** Got %d instead\n", pop);
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exit(-1);
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}
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}
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if (!copy.IsEmpty()) {
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printf("Number of elements in the queue is too long by %d.\n",
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copy.Length());
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exit(-1);
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}
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}
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template<class A>
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class MaxCompare {
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public:
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bool LessThan(const A& a, const A& b) {
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return a > b;
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}
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};
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int main()
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{
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nsTPriorityQueue<int> queue;
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NS_ABORT_IF_FALSE(queue.IsEmpty(), "Queue not initially empty");
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queue.Push(8);
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queue.Push(6);
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queue.Push(4);
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queue.Push(2);
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queue.Push(10);
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queue.Push(6);
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NS_ABORT_IF_FALSE(queue.Top() == 2, "Unexpected queue top");
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NS_ABORT_IF_FALSE(queue.Length() == 6, "Unexpected queue length");
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NS_ABORT_IF_FALSE(!queue.IsEmpty(), "Queue empty when populated");
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int expected[] = { 2, 4, 6, 6, 8, 10 };
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CheckPopSequence(queue, expected, sizeof(expected) / sizeof(expected[0]));
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// copy ctor is tested by using CheckPopSequence, but check default assignment
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// operator
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nsTPriorityQueue<int> queue2;
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queue2 = queue;
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CheckPopSequence(queue2, expected, sizeof(expected) / sizeof(expected[0]));
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queue.Clear();
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NS_ABORT_IF_FALSE(queue.IsEmpty(), "Queue not emptied by Clear");
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// try same sequence with a max heap
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nsTPriorityQueue<int, MaxCompare<int> > max_queue;
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max_queue.Push(8);
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max_queue.Push(6);
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max_queue.Push(4);
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max_queue.Push(2);
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max_queue.Push(10);
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max_queue.Push(6);
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NS_ABORT_IF_FALSE(max_queue.Top() == 10, "Unexpected queue top for max heap");
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int expected_max[] = { 10, 8, 6, 6, 4, 2 };
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CheckPopSequence(max_queue, expected_max,
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sizeof(expected_max) / sizeof(expected_max[0]));
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return 0;
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}
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