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130 lines
2.7 KiB
Go
130 lines
2.7 KiB
Go
// File: stack_test.go
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// Created Time: 2022-11-28
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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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"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 TestStack(t *testing.T) {
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/* 初始化栈 */
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// 在 Go 中，推荐将 Slice 当作栈来使用
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var stack []int
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/* 元素入栈 */
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stack = append(stack, 1)
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stack = append(stack, 3)
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stack = append(stack, 2)
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stack = append(stack, 5)
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stack = append(stack, 4)
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fmt.Print("栈 = ")
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PrintSlice(stack)
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/* 访问栈顶元素 */
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peek := stack[len(stack)-1]
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fmt.Println("栈顶元素 peek =", peek)
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/* 元素出栈 */
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pop := stack[len(stack)-1]
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stack = stack[:len(stack)-1]
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fmt.Print("出栈元素 pop = ", pop, "，出栈后 stack = ")
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PrintSlice(stack)
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/* 获取栈的长度 */
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size := len(stack)
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fmt.Println("栈的长度 size =", size)
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/* 判断是否为空 */
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isEmpty := len(stack) == 0
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fmt.Println("栈是否为空 =", isEmpty)
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}
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func TestArrayStack(t *testing.T) {
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// 初始化栈, 使用接口承接
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stack := NewArrayStack()
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// 元素入栈
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stack.Push(1)
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stack.Push(3)
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stack.Push(2)
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stack.Push(5)
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stack.Push(4)
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fmt.Print("栈 stack = ")
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PrintSlice(stack.toSlice())
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// 访问栈顶元素
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peek := stack.Peek()
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fmt.Println("栈顶元素 peek =", peek)
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// 元素出栈
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pop := stack.Pop()
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fmt.Print("出栈元素 pop = ", pop, ", 出栈后 stack = ")
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PrintSlice(stack.toSlice())
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// 获取栈的长度
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size := stack.Size()
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fmt.Println("栈的长度 size =", size)
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// 判断是否为空
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isEmpty := stack.IsEmpty()
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fmt.Println("栈是否为空 =", isEmpty)
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}
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func TestLinkedListStack(t *testing.T) {
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// 初始化栈
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stack := NewLinkedListStack()
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// 元素入栈
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stack.Push(1)
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stack.Push(3)
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stack.Push(2)
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stack.Push(5)
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stack.Push(4)
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fmt.Print("栈 stack = ")
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PrintList(stack.toList())
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// 访问栈顶元素
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peek := stack.Peek()
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fmt.Println("栈顶元素 peek =", peek)
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// 元素出栈
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pop := stack.Pop()
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fmt.Print("出栈元素 pop = ", pop, ", 出栈后 stack = ")
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PrintList(stack.toList())
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// 获取栈的长度
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size := stack.Size()
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fmt.Println("栈的长度 size =", size)
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// 判断是否为空
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isEmpty := stack.IsEmpty()
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fmt.Println("栈是否为空 =", isEmpty)
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}
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// BenchmarkArrayStack 8 ns/op in Mac M1 Pro
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func BenchmarkArrayStack(b *testing.B) {
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stack := NewArrayStack()
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// use b.N for looping
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for i := 0; i < b.N; i++ {
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stack.Push(777)
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}
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for i := 0; i < b.N; i++ {
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stack.Pop()
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}
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}
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// BenchmarkLinkedListStack 65.02 ns/op in Mac M1 Pro
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func BenchmarkLinkedListStack(b *testing.B) {
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stack := NewLinkedListStack()
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// use b.N for looping
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for i := 0; i < b.N; i++ {
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stack.Push(777)
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}
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for i := 0; i < b.N; i++ {
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stack.Pop()
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}
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}
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