go?get?github.com/DATA-DOG/go-sqlmock

//?app.go
package?main
import?"database/sql"
//?recordStats?記錄用戶瀏覽產(chǎn)品信息
func?recordStats(db?*sql.DB,?userID,?productID?int64)?(err?error)?{
?//?開啟事務(wù)
?//?操作views和product_viewers兩張表
?tx,?err?:=?db.Begin()
?if?err?!=?nil?{
??return
?}
?defer?func()?{
??switch?err?{
??case?nil:
???err?=?tx.Commit()
??default:
???tx.Rollback()
??}
?}()
?//?更新products表
?if?_,?err?=?tx.Exec("UPDATE?products?SET?views?=?views?+?1");?err?!=?nil?{
??return
?}
?//?product_viewers表中插入一條數(shù)據(jù)
?if?_,?err?=?tx.Exec(
??"INSERT?INTO?product_viewers?(user_id,?product_id)?VALUES?(?,??)",
??userID,?productID);?err?!=?nil?{
??return
?}
?return
}
func?main()?{
?//?注意：測試的過程中并不需要真正的連接
?db,?err?:=?sql.Open("mysql",?"root@/blog")
?if?err?!=?nil?{
??panic(err)
?}
?defer?db.Close()
?//?userID為1的用戶瀏覽了productID為5的產(chǎn)品
?if?err?=?recordStats(db,?1?/*some?user?id*/,?5?/*some?product?id*/);?err?!=?nil?{
??panic(err)
?}
}

package?main
import?(
?"fmt"
?"testing"
?"github.com/DATA-DOG/go-sqlmock"
)
//?TestShouldUpdateStats?sql執(zhí)行成功的測試用例
func?TestShouldUpdateStats(t?*testing.T)?{
?//?mock一個*sql.DB對象，不需要連接真實的數(shù)據(jù)庫
?db,?mock,?err?:=?sqlmock.New()
?if?err?!=?nil?{
??t.Fatalf("an?error?'%s'?was?not?expected?when?opening?a?stub?database?connection",?err)
?}
?defer?db.Close()
?//?mock執(zhí)行指定SQL語句時的返回結(jié)果
?mock.ExpectBegin()
?mock.ExpectExec("UPDATE?products").WillReturnResult(sqlmock.NewResult(1,?1))
?mock.ExpectExec("INSERT?INTO?product_viewers").WithArgs(2,?3).WillReturnResult(sqlmock.NewResult(1,?1))
?mock.ExpectCommit()
?//?將mock的DB對象傳入我們的函數(shù)中
?if?err?=?recordStats(db,?2,?3);?err?!=?nil?{
??t.Errorf("error?was?not?expected?while?updating?stats:?%s",?err)
?}
?//?確保期望的結(jié)果都滿足
?if?err?:=?mock.ExpectationsWereMet();?err?!=?nil?{
??t.Errorf("there?were?unfulfilled?expectations:?%s",?err)
?}
}
//?TestShouldRollbackStatUpdatesOnFailure?sql執(zhí)行失敗回滾的測試用例
func?TestShouldRollbackStatUpdatesOnFailure(t?*testing.T)?{
?db,?mock,?err?:=?sqlmock.New()
?if?err?!=?nil?{
??t.Fatalf("an?error?'%s'?was?not?expected?when?opening?a?stub?database?connection",?err)
?}
?defer?db.Close()
?mock.ExpectBegin()
?mock.ExpectExec("UPDATE?products").WillReturnResult(sqlmock.NewResult(1,?1))
?mock.ExpectExec("INSERT?INTO?product_viewers").
??WithArgs(2,?3).
??WillReturnError(fmt.Errorf("some?error"))
?mock.ExpectRollback()
?//?now?we?execute?our?method
?if?err?=?recordStats(db,?2,?3);?err?==?nil?{
??t.Errorf("was?expecting?an?error,?but?there?was?none")
?}
?//?we?make?sure?that?all?expectations?were?met
?if?err?:=?mock.ExpectationsWereMet();?err?!=?nil?{
??t.Errorf("there?were?unfulfilled?expectations:?%s",?err)
?}
}

go?get?github.com/alicebob/miniredis/v2

//?redis_op.go
package?miniredis_demo
import?(
?"context"
?"github.com/go-redis/redis/v8"?//?注意導(dǎo)入版本
?"strings"
?"time"
)
const?(
?KeyValidWebsite?=?"app:valid:website:list"
)
func?DoSomethingWithRedis(rdb?*redis.Client,?key?string)?bool?{
?//?這里可以是對redis操作的一些邏輯
?ctx?:=?context.TODO()
?if?!rdb.SIsMember(ctx,?KeyValidWebsite,?key).Val()?{
??return?false
?}
?val,?err?:=?rdb.Get(ctx,?key).Result()
?if?err?!=?nil?{
??return?false
?}
?if?!strings.HasPrefix(val,?"https://")?{
??val?=?"https://"?+?val
?}
?//?設(shè)置?blog?key?五秒過期
?if?err?:=?rdb.Set(ctx,?"blog",?val,?5*time.Second).Err();?err?!=?nil?{
??return?false
?}
?return?true
}

//?redis_op_test.go
package?miniredis_demo
import?(
?"github.com/alicebob/miniredis/v2"
?"github.com/go-redis/redis/v8"
?"testing"
?"time"
)
func?TestDoSomethingWithRedis(t?*testing.T)?{
?//?mock一個redis?server
?s,?err?:=?miniredis.Run()
?if?err?!=?nil?{
??panic(err)
?}
?defer?s.Close()
?//?準(zhǔn)備數(shù)據(jù)
?s.Set("q1mi",?"liwenzhou.com")
?s.SAdd(KeyValidWebsite,?"q1mi")
?//?連接mock的redis?server
?rdb?:=?redis.NewClient(&redis.Options{
??Addr:?s.Addr(),?//?mock?redis?server的地址
?})
?//?調(diào)用函數(shù)
?ok?:=?DoSomethingWithRedis(rdb,?"q1mi")
?if?!ok?{
??t.Fatal()
?}
?//?可以手動檢查redis中的值是否復(fù)合預(yù)期
?if?got,?err?:=?s.Get("blog");?err?!=?nil?||?got?!=?"https://liwenzhou.com"?{
??t.Fatalf("'blog'?has?the?wrong?value")
?}
?//?也可以使用幫助工具檢查
?s.CheckGet(t,?"blog",?"https://liwenzhou.com")
?//?過期檢查
?s.FastForward(5?*?time.Second)?//?快進5秒
?if?s.Exists("blog")?{
??t.Fatal("'blog'?should?not?have?existed?anymore")
?}
}