| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| |
| #include <glog/logging.h> |
| #include <gtest/gtest.h> |
| #include "common/logging.h" |
| #include "common/compiler-util.h" |
| #include "util/priority-queue.h" |
| |
| namespace impala { |
| |
| class IntComparator { |
| public: |
| bool ALWAYS_INLINE Less(const int& x, const int& y) const { return x < y; } |
| }; |
| |
| // Basic Push and Pop operations on total_num_values integers. |
| void TestInt(int total_num_values) { |
| |
| IntComparator int_comparator; |
| PriorityQueue<int, IntComparator> queue(int_comparator); |
| int values[total_num_values]; |
| |
| // Setup a total of total_num_values distinct integers in arrayvalues[]. |
| for (int i = 0; i < total_num_values; i++) { |
| values[i] = i; |
| } |
| // Randomize all elements in values[]. |
| srand(19); |
| for (int i = 0; i < total_num_values - 1; i++) { |
| // find an element to swap with the current element at i. |
| int index = i + rand() % (total_num_values - i - 1) + 1; |
| // |
| ASSERT_GE(index, i + 1); |
| ASSERT_LE(index, total_num_values - 1); |
| // swap elements at i and index |
| int t = values[i]; |
| values[i] = values[index]; |
| values[index] = t; |
| } |
| // Push all elements in values[] into the heap. |
| for (int i = 0; i < total_num_values; i++) { |
| queue.Push(values[i]); |
| } |
| // Checkout the heap size and allocation capacity. |
| ASSERT_EQ(queue.Size(), total_num_values); |
| // Pop each element out. Since this is a max-heap, we expect to see |
| // elements poped in descending order. |
| int v = -1; |
| for (int i = 0; i < total_num_values; i++) { |
| v = queue.Pop(); |
| ASSERT_EQ(v, total_num_values - i - 1); |
| ASSERT_EQ(queue.Size(), total_num_values - i - 1); |
| } |
| } |
| |
| TEST(PriorityQueueTest, TestBasic) { |
| TestInt(100); |
| TestInt(1000); |
| TestInt(5000); |
| } |
| |
| template class PriorityQueue<int, IntComparator>; |
| template class PriorityQueueIterator<int, IntComparator>; |
| |
| } |
| |