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102 lines
2.1 KiB
102 lines
2.1 KiB
// File: heap_test.go
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// Created Time: 2023-01-12
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// Author: Reanon (793584285@qq.com)
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package chapter_heap
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import (
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"container/heap"
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"fmt"
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"strconv"
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"testing"
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. "github.com/krahets/hello-algo/pkg"
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)
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func testPush(h *intHeap, val int) {
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// 调用 heap.Interface 的函数，来添加元素
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heap.Push(h, val)
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fmt.Printf("\n元素 %d 入堆后 \n", val)
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PrintHeap(*h)
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}
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func testPop(h *intHeap) {
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// 调用 heap.Interface 的函数，来移除元素
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val := heap.Pop(h)
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fmt.Printf("\n堆顶元素 %d 出堆后 \n", val)
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PrintHeap(*h)
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}
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func TestHeap(t *testing.T) {
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/* 初始化堆 */
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// 初始化大顶堆
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maxHeap := &intHeap{}
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heap.Init(maxHeap)
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/* 元素入堆 */
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testPush(maxHeap, 1)
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testPush(maxHeap, 3)
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testPush(maxHeap, 2)
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testPush(maxHeap, 5)
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testPush(maxHeap, 4)
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/* 获取堆顶元素 */
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top := maxHeap.Top()
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fmt.Printf("堆顶元素为 %d\n", top)
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/* 堆顶元素出堆 */
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testPop(maxHeap)
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testPop(maxHeap)
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testPop(maxHeap)
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testPop(maxHeap)
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testPop(maxHeap)
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/* 获取堆大小 */
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size := len(*maxHeap)
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fmt.Printf("堆元素数量为 %d\n", size)
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/* 判断堆是否为空 */
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isEmpty := len(*maxHeap) == 0
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fmt.Printf("堆是否为空 %t\n", isEmpty)
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}
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func TestMyHeap(t *testing.T) {
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/* 初始化堆 */
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// 初始化大顶堆
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maxHeap := newMaxHeap([]any{9, 8, 6, 6, 7, 5, 2, 1, 4, 3, 6, 2})
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fmt.Printf("输入数组并建堆后\n")
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maxHeap.print()
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/* 获取堆顶元素 */
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peek := maxHeap.peek()
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fmt.Printf("\n堆顶元素为 %d\n", peek)
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/* 元素入堆 */
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val := 7
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maxHeap.push(val)
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fmt.Printf("\n元素 %d 入堆后\n", val)
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maxHeap.print()
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/* 堆顶元素出堆 */
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peek = maxHeap.pop()
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fmt.Printf("\n堆顶元素 %d 出堆后\n", peek)
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maxHeap.print()
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/* 获取堆大小 */
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size := maxHeap.size()
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fmt.Printf("\n堆元素数量为 %d\n", size)
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/* 判断堆是否为空 */
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isEmpty := maxHeap.isEmpty()
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fmt.Printf("\n堆是否为空 %t\n", isEmpty)
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}
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func TestTopKHeap(t *testing.T) {
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/* 初始化堆 */
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// 初始化大顶堆
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nums := []int{1, 7, 6, 3, 2}
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k := 3
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res := topKHeap(nums, k)
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fmt.Printf("最大的 " + strconv.Itoa(k) + " 个元素为")
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PrintHeap(*res)
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}
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