Go 来自多个测试用例的类似sqlmock期望导致false失败

在尝试测试以下函数时：

//Transaction Begins a sql transaction.
func Transaction(db *sql.DB, txFunc func(*sql.Tx) *errors.ErrorSt) (retErrSt *errors.ErrorSt) {
    retErrSt = nil
    tx, retErrSt := beginTrans(db)
    if retErrSt != nil {
        return retErrSt
    }

    defer func() {
        if p := recover(); p != nil {
            tx.Rollback()
            panic(p) // re-throw panic after Rollback
        } else if retErrSt != nil {
            tx.Rollback()
        } else {
            if err := tx.Commit(); err != nil {
                retErrSt = errors.Database().AddDetails(err.Error())
            }
        }
    }()
    retErrSt = txFunc(tx)
    return retErrSt
}

我使用库来模拟数据库操作。到目前为止，这对我很有用，但当我开始堆积测试用例时，它会导致回归

设置

因此，我的测试设置是：

// database mock/stub setup
    db, mock, err := sqlmock.New()
    if !assert.Nilf(t,
        err,
        "Error on trying to start up a stub database connection") {
        t.Fatal()
    }
    defer db.Close()

Error Trace:    dbConnectionsU_test.go:1859
                Error:          Not equal: 
                                expected: &errors.ErrorSt{Code:"", Message:"", Scope:0, Severity:0, Details:errors.LoggerDetails(nil), InnerError:(*errors.ErrorSt)(nil), Stack:""}
                                actual  : &errors.ErrorSt{Code:"db", Message:"", Scope:0, Severity:0, Details:errors.LoggerDetails{"call to database transaction Begin, was not expected, next expectation is: ExpectedCommit => expecting transaction Commit, which should return error: test commit error"}, InnerError:(*errors.ErrorSt)(nil), Stack:"\n\n\tC:/Go/src/runtime/debug/stack.go:24 +0xae\nezsoft/apiserver_sdk/utilities/utilityCore.GetCleanStack(0xc042069470, 0x3, 0x3, 0x3, 0xc0420db8e8)\n\tD:/dev2017/GO/src/ezsoft/apiserver_sdk/utilities/utilityCore/utilityCore.go:56 +0x3b\nezsoft/apiserver_sdk/db.beginTrans(0xc04204d360, 0x0, 0x0)\n\tD:/dev2017/GO/src/ezsoft/apiserver_sdk/db/dbConnectionsU.go:365 +0x100\nezsoft/apiserver_sdk/db.Transaction(0xc04204d360, 0x821690, 0x0)\n\tD:/dev2017/GO/src/ezsoft/apiserver_sdk/db/dbConnectionsU.go:443 +0x3f\nezsoft/apiserver_sdk/db.TestTransaction.func2(0xc0421363c0)\n\tD:/dev2017/GO/src/ezsoft/apiserver_sdk/db/dbConnectionsU_test.go:1851 +0x75\ntesting.tRunner(0xc0421363c0, 0xc0420e48a0)\n\tC:/Go/src/testing/testing.go:777 +0xd7\ncreated by testing.(*T).Run\n\tC:/Go/src/testing/testing.go:824 +0x2e7\n"}

                                Diff:
                                --- Expected
                                +++ Actual
                                @@ -1,3 +1,3 @@
                                 (*errors.ErrorSt)({
                                - Code: (string) "",
                                + Code: (string) (len=2) "db",
                                  Message: (string) "",
                                @@ -5,5 +5,7 @@
                                  Severity: (errors.Severity) 0,
                                - Details: (errors.LoggerDetails) <nil>,
                                + Details: (errors.LoggerDetails) (len=1) {
                                +  (string) (len=167) "call to database transaction Begin, was not expected, next expectation is: ExpectedCommit => expecting transaction Commit, which should return error: test commit error"
                                + },
                                  InnerError: (*errors.ErrorSt)(<nil>),
                                - Stack: (string) ""
                                + Stack: (string) (len=788) "\n\n\tC:/Go/src/runtime/debug/stack.go:24 +0xae\nezsoft/apiserver_sdk/utilities/utilityCore.GetCleanStack(0xc042069470, 0x3, 0x3, 0x3, 0xc0420db8e8)\n\tD:/dev2017/GO/src/ezsoft/apiserver_sdk/utilities/utilityCore/utilityCore.go:56 +0x3b\nezsoft/apiserver_sdk/db.beginTrans(0xc04204d360, 0x0, 0x0)\n\tD:/dev2017/GO/src/ezsoft/apiserver_sdk/db/dbConnectionsU.go:365 +0x100\nezsoft/apiserver_sdk/db.Transaction(0xc04204d360, 0x821690, 0x0)\n\tD:/dev2017/GO/src/ezsoft/apiserver_sdk/db/dbConnectionsU.go:443 +0x3f\nezsoft/apiserver_sdk/db.TestTransaction.func2(0xc0421363c0)\n\tD:/dev2017/GO/src/ezsoft/apiserver_sdk/db/dbConnectionsU_test.go:1851 +0x75\ntesting.tRunner(0xc0421363c0, 0xc0420e48a0)\n\tC:/Go/src/testing/testing.go:777 +0xd7\ncreated by testing.(*T).Run\n\tC:/Go/src/testing/testing.go:824 +0x2e7\n"
                                 })
                Test:           TestTransaction/WantErrorFromCallback

测试功能

为了创建这个MVCE，我将它简化为两个测试。当另一个被注释掉时，这两个选项都起作用：

第一次测试

第二次测试

问题

当我确定没有人被评论掉时，我就陷入了混乱。因此，我得到的信息是：

// database mock/stub setup
    db, mock, err := sqlmock.New()
    if !assert.Nilf(t,
        err,
        "Error on trying to start up a stub database connection") {
        t.Fatal()
    }
    defer db.Close()

Error Trace:    dbConnectionsU_test.go:1859
                Error:          Not equal: 
                                expected: &errors.ErrorSt{Code:"", Message:"", Scope:0, Severity:0, Details:errors.LoggerDetails(nil), InnerError:(*errors.ErrorSt)(nil), Stack:""}
                                actual  : &errors.ErrorSt{Code:"db", Message:"", Scope:0, Severity:0, Details:errors.LoggerDetails{"call to database transaction Begin, was not expected, next expectation is: ExpectedCommit => expecting transaction Commit, which should return error: test commit error"}, InnerError:(*errors.ErrorSt)(nil), Stack:"\n\n\tC:/Go/src/runtime/debug/stack.go:24 +0xae\nezsoft/apiserver_sdk/utilities/utilityCore.GetCleanStack(0xc042069470, 0x3, 0x3, 0x3, 0xc0420db8e8)\n\tD:/dev2017/GO/src/ezsoft/apiserver_sdk/utilities/utilityCore/utilityCore.go:56 +0x3b\nezsoft/apiserver_sdk/db.beginTrans(0xc04204d360, 0x0, 0x0)\n\tD:/dev2017/GO/src/ezsoft/apiserver_sdk/db/dbConnectionsU.go:365 +0x100\nezsoft/apiserver_sdk/db.Transaction(0xc04204d360, 0x821690, 0x0)\n\tD:/dev2017/GO/src/ezsoft/apiserver_sdk/db/dbConnectionsU.go:443 +0x3f\nezsoft/apiserver_sdk/db.TestTransaction.func2(0xc0421363c0)\n\tD:/dev2017/GO/src/ezsoft/apiserver_sdk/db/dbConnectionsU_test.go:1851 +0x75\ntesting.tRunner(0xc0421363c0, 0xc0420e48a0)\n\tC:/Go/src/testing/testing.go:777 +0xd7\ncreated by testing.(*T).Run\n\tC:/Go/src/testing/testing.go:824 +0x2e7\n"}

                                Diff:
                                --- Expected
                                +++ Actual
                                @@ -1,3 +1,3 @@
                                 (*errors.ErrorSt)({
                                - Code: (string) "",
                                + Code: (string) (len=2) "db",
                                  Message: (string) "",
                                @@ -5,5 +5,7 @@
                                  Severity: (errors.Severity) 0,
                                - Details: (errors.LoggerDetails) <nil>,
                                + Details: (errors.LoggerDetails) (len=1) {
                                +  (string) (len=167) "call to database transaction Begin, was not expected, next expectation is: ExpectedCommit => expecting transaction Commit, which should return error: test commit error"
                                + },
                                  InnerError: (*errors.ErrorSt)(<nil>),
                                - Stack: (string) ""
                                + Stack: (string) (len=788) "\n\n\tC:/Go/src/runtime/debug/stack.go:24 +0xae\nezsoft/apiserver_sdk/utilities/utilityCore.GetCleanStack(0xc042069470, 0x3, 0x3, 0x3, 0xc0420db8e8)\n\tD:/dev2017/GO/src/ezsoft/apiserver_sdk/utilities/utilityCore/utilityCore.go:56 +0x3b\nezsoft/apiserver_sdk/db.beginTrans(0xc04204d360, 0x0, 0x0)\n\tD:/dev2017/GO/src/ezsoft/apiserver_sdk/db/dbConnectionsU.go:365 +0x100\nezsoft/apiserver_sdk/db.Transaction(0xc04204d360, 0x821690, 0x0)\n\tD:/dev2017/GO/src/ezsoft/apiserver_sdk/db/dbConnectionsU.go:443 +0x3f\nezsoft/apiserver_sdk/db.TestTransaction.func2(0xc0421363c0)\n\tD:/dev2017/GO/src/ezsoft/apiserver_sdk/db/dbConnectionsU_test.go:1851 +0x75\ntesting.tRunner(0xc0421363c0, 0xc0420e48a0)\n\tC:/Go/src/testing/testing.go:777 +0xd7\ncreated by testing.(*T).Run\n\tC:/Go/src/testing/testing.go:824 +0x2e7\n"
                                 })
                Test:           TestTransaction/WantErrorFromCallback

Error Trace:dbConnectionsU\u test.go:1859
错误：不等于：
应为：&errors.ErrorSt{Code:，消息：，作用域：0，严重性：0，详细信息：errors.LoggerDetails（nil），InnerError:（*errors.ErrorSt）（nil），堆栈：}
实际：&errors.ErrorSt{Code:“db”，消息：，作用域：0，严重性：0，详细信息：错误。对数据库事务开始的LoggerDetails{”调用不是预期的，下一个预期是：ExpectedCommit=>预期事务提交，它应该返回错误：test Commit error“}，InnerError:（*errors.ErrorSt）（nil），堆栈：“\n\n\tC:/Go/src/runtime/debug/stack.Go:24+0xae\nezsoft/apiserver\u sdk/utilityCore.GetCleanStack（0xc042069470、0x3、0x3、0xc0420db8e8）\n\tD:/dev2017/Go/src/ezsoft/apiserver\u sdk/utilityCore/utilityCore.Go:56+0x3b\nezsoft/apiserver\u sdk/db.beginters（0xc04204d360、0x0、0x0、0x0、0x0）\n\tD:/dev2017/GO/src/ezsoft/apiserver\u sdk/db/dbConnectionsU.GO:365+0x100\nezsoft/apiserver\u sdk/db.Transaction（0xc04204d360，0x821690，0x0）\n\tD:/dev2017/GO/src/ezsoft/apiserver\u sdk/db/dbConnectionsU.GO:443+0x3f\nezsoft/apiserver\u sdk/db.TestTransaction.func2（0xc0421363c0）\n\tD:/dev2017/GO/src/ezsoft/apiserver\u sdk/db/dbConnectionsU\u test.GO:1851+0x75\ntesting.tRunner（0xc0421363c0，0xc0420e48a0）\n\tC:/GO/src/testing/testing.GO:777+0xd7\n由测试创建。（*T）。运行\n\tC:/GO/src/testing/testing/testing.GO:824+0x2e7\n“
差异：
---期望
+++实际的
@@ -1,3 +1,3 @@
（*errors.ErrorSt）({
-代码：（字符串）“，
+代码：（字符串）（len=2）“db”，
消息：（字符串）“，
@@ -5,5 +5,7 @@
严重性：（错误。严重性）0，
-详细信息：（错误。日志详细信息），
+详细信息：（errors.LoggerDetails）（len=1）{
+（string）（len=167）“对数据库事务开始的调用不是预期的，下一个预期是：ExpectedCommit=>expecting transaction Commit，它应该返回错误：test Commit error”
+ },
InnerError:（*errors.ErrorSt）（，
-堆栈：（字符串）”
+Stack：（string）（len=788）“\n\n\tC:/Go/src/runtime/debug/Stack.Go:24+0xae\nezsoft/apiserver\u sdk/utilityCore/utilityCore.GetCleanStack（0xc042069470，0x3，0x3，0x3，0xc0420db8e8）\n\tD:/dev2017/Go/src/ezsoft/apiserver\u sdk/utilities/utilityCore/utilityCore/utilityCore/utilityCore.Go:56+0x3b\nezsoft/apiserver\u sdk/db.beginterns（0xc04204d360，0x0，0x0，0x0）\n\tD:/dev2017/GO/src/ezsoft/apiserver\u sdk/db/dbConnectionsU.GO:365+0x100\nezsoft/apiserver\u sdk/db.Transaction（0xc04204d360，0x821690，0x0）\n\tD:/dev2017/GO/src/ezsoft/apiserver\u sdk/db/dbConnectionsU.GO:443+0x3f\nezsoft/apiserver\u sdk/db.TestTransaction.func2（0xc0421363c0）\n\tD:/dev2017/GO/src/ezsoft/apiserver\u sdk/db/dbConnectionsU\u test.GO:1851+0x75\ntesting.tRunner（0xc0421363c0，0xc0420e48a0）\n\tC:/GO/src/testing/testing.GO:777+0xd7\n由测试创建。（*T）。运行\n\tC:/GO/src/testing/testing/testing.GO:824+0x2e7\n”
})
测试：TestTransaction/WantErrorFromCallback

这就像从未预料到的对

Begin

的调用一样，但在这两种情况下，第一行代码实际上都是

mock.ExpectBegin（）

我怀疑它可能必须处理

延迟

红色代码，无论是在被测函数中还是在我的测试代码中，但我不知道如何控制它。此外，我不确定我的怀疑是否正确。

哇，我觉得很傻

问题在于同步，而且显然是陈旧的模拟状态

解决方案

我没有采用标准方法，而是将测试本身重新分解为套件方法，这些方法在

defer

红色函数中断言

ExpectationsWereMet（）

。预期（

ExpectCommit

，

ExpectRollback

，…）是首先发生的事情

真不敢相信我只是为了这么简单的事才提出这个问题