转载 于 Go语言基础之单元测试

Split包

package split_string

import "strings"

// Split 字符串

func Split(str string, sep string) []string {

    var res = make([]string, 0, strings.Count(str, sep)+1)

    idx := strings.Index(str, sep)
    sep_len := len(sep)
    for idx >= 0 {
        res = append(res, str[:idx])
        str = str[idx+sep_len:]
        idx = strings.Index(str, sep)
    }
    res = append(res, str)
    return res
}

Split包 测试组

// split/split_test.go

package split_string

import (
    "reflect"
    "testing"
)

func TestSplit(t *testing.T) {
    type test struct { // 定义test结构体
        input string
        sep   string
        want  []string
    }
    tests := map[string]test{ // 测试用例使用map存储
        "simple":      {input: "a:b:c", sep: ":", want: []string{"a", "b", "c"}},
        "wrong sep":   {input: "a:b:c", sep: ",", want: []string{"a:b:c"}},
        "more sep":    {input: "abcd", sep: "bc", want: []string{"a", "d"}},
        "leading sep": {input: "上海自来水来自海上", sep: "海", want: []string{"上", "自来水来自", "上"}},
    }
    for name, tc := range tests {
        t.Run(name, func(t *testing.T) { // 使用t.Run()执行子测试
            got := Split(tc.input, tc.sep)
            if !reflect.DeepEqual(got, tc.want) {
                t.Errorf("excepted:%#v, got:%#v", tc.want, got)
            }
        })
    }
}

上课笔记

1.go test -v : 直接显示test后的结果，不需要编译
2.go test -cover -coverprofile=cover.out 覆盖率输出成文本形式
3.go tool cover -html=cover.out 以HTML的形式查看其覆盖率的情况
4.func TestSplit(t *testing.T) ：必须以Test开头，同时参数是固定为t *testing.T