当我运行它时,我的一个单元测试似乎随机通过或失败。为什么会发生这种情况对我来说唯一有意义的是每次运行测试时数据库中的数据是否进入不同的状态,但我在每次测试中使用事务来回滚数据库 - 除非它不能正常工作. 这是我的基本单元测试类和有问题的单元测试类。你能看到我可能遗漏的任何东西或我应该寻找的其他东西吗?
TestDriven.Net和Visual Studio 单元测试框架会发生这种情况。
Partial Public MustInherit Class TestBase
Private _scope As Transactions.TransactionScope
<DebuggerStepThrough()> _
<TestInitialize()> _
Public Sub Setup()
//'Start the Distribution Transaction Coordinator, if it's not already running.
Using dtcService As New System.ServiceProcess.ServiceController("Distributed Transaction Coordinator", My.Computer.Name)
If dtcService.Status = ServiceProcess.ServiceControllerStatus.Stopped Then
dtcService.Start()
End If
End Using
_scope = New TransactionScope(TransactionScopeOption.RequiresNew, New TimeSpan(0))
End Sub
<DebuggerStepThrough()> _
<TestCleanup()>
Public Sub Teardown()
If _scope IsNot Nothing Then
_scope.Dispose()
End If
End Sub
<System.Diagnostics.DebuggerStepThrough()> _
Public Shared Function ExecSql(ByVal sql As String) As System.Data.DataTable
Dim connStr = GlobalSettings.GetConnectionString()
Using conn As New System.Data.SqlClient.SqlConnection(connStr)
conn.Open()
Dim cmd As New System.Data.SqlClient.SqlCommand(sql.ToString, conn)
Dim adapter As System.Data.SqlClient.SqlDataAdapter = New System.Data.SqlClient.SqlDataAdapter(cmd)
Dim dt As System.Data.DataTable = New System.Data.DataTable
adapter.Fill(dt)
Return dt
If conn.State <> System.Data.ConnectionState.Closed Then
conn.Close()
End If
conn.Dispose()
End Using
End Function
End Class
这是我的单元测试:
Partial Public Class CampaignEmailSendLimitServiceTests
Inherits TestBase
Private _service = ServiceManager.Current.MyService
<TestMethod()> _
Public Sub MyTest()
//' Set the pre-test condition.
ExecSql("update base.dbo.tblTableA set someDate = '2010-06-28' where id = 56937 ")
//' Run the service
_service.Process()
//' Verify the expected result
Dim dt = ExecSql("select deliveryDate from tblTableB ")
Assert.AreEqual(False, dt.Rows(0).IsNull("deliveryDate"))
End Sub
End Class