希望能成功

package main

import (
    "fmt"
    "testing"
    "time"
)

type Temp struct {
    TimeLocation func(name string) (*time.Location, error)
}

func (t Temp) DoSomeThing() error {
    loc, err := t.TimeLocation("")
    if err != nil {
        return err
    }
    fmt.Println(loc)
    return nil
}

func Test_Temp(t *testing.T) {
    cases := []struct {
        name    string
        locFunc func(name string) (*time.Location, error)
        wantErr bool
    }{
        {"default", time.LoadLocation, false},
        {"error", func(name string) (*time.Location, error) {
            return nil, fmt.Errorf("test error")
        }, true},
    }
    for _, c := range cases {
        t.Run(c.name, func(t *testing.T) {
            temp := Temp{TimeLocation: c.locFunc}
            err := temp.DoSomeThing()
            if err != nil != c.wantErr {
                t.Fatalf("wantErr except %v, got %v", c.wantErr, err != nil)
            }
        })
    }
}