如何将go sqlmock WithArgs（）与可变数量的参数一起使用？

我使用go-sqlmock（）测试一个接收可变数量参数的函数（为了简单起见，我简化了该函数，并去掉了大部分代码）：

测试结果如下所示：

// rows := ...
actions := []string{"click", "event"}
mock.ExpectQuery(`^select .*`).WithArgs(actions).WillReturnRows(rows)
hits, err := getHits(db, actions...)
if mockErr := mock.ExpectationsWereMet(); mockErr != nil {
    log.Fatalf("there were unfulfilled expections: %s", mockErr)
}

然后我得到这个输出：

2017/12/21 10:38:23 there were unfulfilled expections: there is a remaining expectation which was not matched: ExpectedQuery => expecting Query or QueryRow which:
- matches sql: '^select .*'
- is with arguments:
  0 - [click event]
- should return rows: ...

2017/12/21 10:44:41 there were unfulfilled expections: there is a remaining expectation which was not matched: ExpectedQuery => expecting Query or QueryRow which:
- matches sql: '^select .*'
- is with arguments:
  0 - click
  1 - event
- should return rows:

如果我像这样更改测试：

mock.ExpectQuery(`^select .*`).WithArgs(actions[0], actions[1]).WillReturnRows(rows)

然后我得到这个输出：

2017/12/21 10:38:23 there were unfulfilled expections: there is a remaining expectation which was not matched: ExpectedQuery => expecting Query or QueryRow which:
- matches sql: '^select .*'
- is with arguments:
  0 - [click event]
- should return rows: ...

2017/12/21 10:44:41 there were unfulfilled expections: there is a remaining expectation which was not matched: ExpectedQuery => expecting Query or QueryRow which:
- matches sql: '^select .*'
- is with arguments:
  0 - click
  1 - event
- should return rows:

我唯一能让它通过的就是打电话：

db.Query(query, actions[0], actions[1])

这显然是我不想做的，因为我不知道有多少动作

---

有人知道我如何修复或调试这个问题吗？

我找到了一种解决问题的方法：如果我将字符串片段转换为db.Query的接口片段，它就可以正常工作：

boundValues := make([]interface{}, len(actions))

for i, val := range actions {
    boundValues[i] = val
}

rows, err := db.Query(query, boundValues...)

然后，对于测试：

mock.ExpectQuery(`^select .*`).WithArgs(actions[0], actions[1]).WillReturnRows(rows)

---

注意：仅传递

db.Query（查询，操作…）

不起作用；这导致

无法将操作（类型[]字符串）用作db的参数中的类型[]接口{}。使用
[]接口{}
查询
接受的答案将适用于字符串，但可能会对其他类型抛出错误

简短回答

actions := []driver.Value{"click", "event"}
mock.ExpectQuery(`^select .*`).WithArgs(actions...).WillReturnRows(rows)

长答案

actions := []driver.Value{"click", "event"}
mock.ExpectQuery(`^select .*`).WithArgs(actions...).WillReturnRows(rows)

参数需要
driver.Value
和driver.Value，它们可以是：


int64
浮动64
布尔
[]字节
串
时间，时间

因此，正确的答案是

actions := []driver.Value{"click", "event"}
mock.ExpectQuery(`^select .*`).WithArgs(actions...).WillReturnRows(rows)

一个更干净的解决方案是使用这个

/* Prepare database mock */
type AnyNumber struct{}

// Match satisfies sqlmock.Argument interface
func (a AnyNumber) Match(v driver.Value) bool {
    _, ok := v.(float64)
    return ok
}

然后使用
AnyNumber{}
作为
WithArgs

这是文档中的参考文件
是否
操作…
不起作用？@Flimzy nope；编译器抱怨：
无法将操作（类型[]字符串）用作mock.ExpectQuery（^select.*）的参数中的类型[]driver.Value。WithArgs
将
操作
转换为类型
[]driver.Value
。@Flimzy不幸的是，这会产生与案例2中完全相同的输出。抱歉，哪种情况是2？如果int64属于driver.Value中允许的类型，那么为什么[]int64不能工作？您可以执行[]driver.Value{，…}