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hello-algo/codes/go/chapter_stack_and_queue/queue_test.go

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// File: queue_test.go
// Created Time: 2022-11-28
// Author: Reanon (793584285@qq.com)
package chapter_stack_and_queue
import (
"container/list"
"fmt"
"testing"
. "github.com/krahets/hello-algo/pkg"
)
func TestQueue(t *testing.T) {
/* 初始化队列 */
// 在 Go 中,将 list 作为队列来使用
queue := list.New()
/* 元素入队 */
queue.PushBack(1)
queue.PushBack(3)
queue.PushBack(2)
queue.PushBack(5)
queue.PushBack(4)
fmt.Print("队列 queue = ")
PrintList(queue)
/* 访问队首元素 */
peek := queue.Front()
fmt.Println("队首元素 peek =", peek.Value)
/* 元素出队 */
poll := queue.Front()
queue.Remove(poll)
fmt.Print("出队元素 poll = ", poll.Value, ",出队后 queue = ")
PrintList(queue)
/* 获取队列的长度 */
size := queue.Len()
fmt.Println("队列长度 size =", size)
/* 判断队列是否为空 */
isEmpty := queue.Len() == 0
fmt.Println("队列是否为空 =", isEmpty)
}
func TestArrayQueue(t *testing.T) {
// 初始化队列,使用队列的通用接口
capacity := 10
queue := NewArrayQueue(capacity)
// 元素入队
queue.Offer(1)
queue.Offer(3)
queue.Offer(2)
queue.Offer(5)
queue.Offer(4)
fmt.Print("队列 queue = ")
PrintSlice(queue.toSlice())
// 访问队首元素
peek := queue.Peek()
fmt.Println("队首元素 peek =", peek)
// 元素出队
poll := queue.Poll()
fmt.Print("出队元素 poll = ", poll, ", 出队后 queue = ")
PrintSlice(queue.toSlice())
// 获取队的长度
size := queue.Size()
fmt.Println("队的长度 size =", size)
// 判断是否为空
isEmpty := queue.IsEmpty()
fmt.Println("队是否为空 =", isEmpty)
}
func TestLinkedListQueue(t *testing.T) {
// 初始化队
queue := NewLinkedListQueue()
// 元素入队
queue.Offer(1)
queue.Offer(3)
queue.Offer(2)
queue.Offer(5)
queue.Offer(4)
fmt.Print("队列 queue = ")
PrintList(queue.toList())
// 访问队首元素
peek := queue.Peek()
fmt.Println("队首元素 peek =", peek)
// 元素出队
poll := queue.Poll()
fmt.Print("出队元素 poll = ", poll, ", 出队后 queue = ")
PrintList(queue.toList())
// 获取队的长度
size := queue.Size()
fmt.Println("队的长度 size =", size)
// 判断是否为空
isEmpty := queue.IsEmpty()
fmt.Println("队是否为空 =", isEmpty)
}
// BenchmarkArrayQueue 8 ns/op in Mac M1 Pro
func BenchmarkArrayQueue(b *testing.B) {
capacity := 1000
stack := NewArrayQueue(capacity)
// use b.N for looping
for i := 0; i < b.N; i++ {
stack.Offer(777)
}
for i := 0; i < b.N; i++ {
stack.Poll()
}
}
// BenchmarkLinkedQueue 62.66 ns/op in Mac M1 Pro
func BenchmarkLinkedQueue(b *testing.B) {
stack := NewLinkedListQueue()
// use b.N for looping
for i := 0; i < b.N; i++ {
stack.Offer(777)
}
for i := 0; i < b.N; i++ {
stack.Poll()
}
}