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142 lines
3.5 KiB
142 lines
3.5 KiB
// File: deque_test.go
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// Created Time: 2022-11-29
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// Author: Reanon (793584285@qq.com)
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package chapter_stack_and_queue
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import (
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"container/list"
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"fmt"
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"testing"
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. "github.com/krahets/hello-algo/pkg"
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)
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func TestDeque(t *testing.T) {
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/* 初始化雙向佇列 */
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// 在 Go 中，將 list 作為雙向佇列使用
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deque := list.New()
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/* 元素入列 */
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deque.PushBack(2)
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deque.PushBack(5)
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deque.PushBack(4)
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deque.PushFront(3)
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deque.PushFront(1)
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fmt.Print("雙向佇列 deque = ")
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PrintList(deque)
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/* 訪問元素 */
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front := deque.Front()
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fmt.Println("佇列首元素 front =", front.Value)
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rear := deque.Back()
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fmt.Println("佇列尾元素 rear =", rear.Value)
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/* 元素出列 */
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deque.Remove(front)
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fmt.Print("佇列首出列元素 front = ", front.Value, "，佇列首出列後 deque = ")
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PrintList(deque)
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deque.Remove(rear)
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fmt.Print("佇列尾出列元素 rear = ", rear.Value, "，佇列尾出列後 deque = ")
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PrintList(deque)
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/* 獲取雙向佇列的長度 */
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size := deque.Len()
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fmt.Println("雙向佇列長度 size =", size)
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/* 判斷雙向佇列是否為空 */
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isEmpty := deque.Len() == 0
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fmt.Println("雙向佇列是否為空 =", isEmpty)
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}
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func TestArrayDeque(t *testing.T) {
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/* 初始化雙向佇列 */
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// 在 Go 中，將 list 作為雙向佇列使用
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deque := newArrayDeque(16)
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/* 元素入列 */
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deque.pushLast(3)
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deque.pushLast(2)
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deque.pushLast(5)
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fmt.Print("雙向佇列 deque = ")
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PrintSlice(deque.toSlice())
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/* 訪問元素 */
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peekFirst := deque.peekFirst()
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fmt.Println("佇列首元素 peekFirst =", peekFirst)
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peekLast := deque.peekLast()
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fmt.Println("佇列尾元素 peekLast =", peekLast)
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/* 元素入列 */
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deque.pushLast(4)
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fmt.Print("元素 4 佇列尾入列後 deque = ")
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PrintSlice(deque.toSlice())
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deque.pushFirst(1)
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fmt.Print("元素 1 佇列首入列後 deque = ")
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PrintSlice(deque.toSlice())
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/* 元素出列 */
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popFirst := deque.popFirst()
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fmt.Print("佇列首出列元素 popFirst = ", popFirst, "，佇列首出列後 deque = ")
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PrintSlice(deque.toSlice())
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popLast := deque.popLast()
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fmt.Print("佇列尾出列元素 popLast = ", popLast, "，佇列尾出列後 deque = ")
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PrintSlice(deque.toSlice())
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/* 獲取雙向佇列的長度 */
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size := deque.size()
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fmt.Println("雙向佇列長度 size =", size)
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/* 判斷雙向佇列是否為空 */
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isEmpty := deque.isEmpty()
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fmt.Println("雙向佇列是否為空 =", isEmpty)
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}
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func TestLinkedListDeque(t *testing.T) {
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// 初始化佇列
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deque := newLinkedListDeque()
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// 元素入列
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deque.pushLast(2)
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deque.pushLast(5)
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deque.pushLast(4)
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deque.pushFirst(3)
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deque.pushFirst(1)
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fmt.Print("佇列 deque = ")
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PrintList(deque.toList())
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// 訪問佇列首元素
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front := deque.peekFirst()
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fmt.Println("佇列首元素 front =", front)
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rear := deque.peekLast()
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fmt.Println("佇列尾元素 rear =", rear)
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// 元素出列
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popFirst := deque.popFirst()
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fmt.Print("佇列首出列元素 popFirst = ", popFirst, "，佇列首出列後 deque = ")
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PrintList(deque.toList())
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popLast := deque.popLast()
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fmt.Print("佇列尾出列元素 popLast = ", popLast, "，佇列尾出列後 deque = ")
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PrintList(deque.toList())
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// 獲取隊的長度
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size := deque.size()
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fmt.Println("隊的長度 size =", size)
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// 判斷是否為空
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isEmpty := deque.isEmpty()
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fmt.Println("隊是否為空 =", isEmpty)
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}
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// BenchmarkLinkedListDeque 67.92 ns/op in Mac M1 Pro
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func BenchmarkLinkedListDeque(b *testing.B) {
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deque := newLinkedListDeque()
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// use b.N for looping
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for i := 0; i < b.N; i++ {
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deque.pushLast(777)
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}
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for i := 0; i < b.N; i++ {
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deque.popFirst()
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}
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}
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