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ユーザーから提供されたユーザー/パスワードを使用して FTP 接続をテストしています。

単体テストを個別に実行すると、すべて正常に動作します。しかし、 のFTP_Test_Sucessful前にを実行して順序付きテストを実行するFTP_Test_Unsuccessfulと、FTP_Test_Unsuccessfulテストは失敗します。間違ったパスワードを指定しても、FTP 接続は成功します。接続が成功した後です。

Passed          Unit Test   FTP_Test_Unsuccessful       00:00:02.3566157
Passed          Unit Test   FTP_Test_Sucessful          00:00:00.3048244
Failed          Unit Test   FTP_Test_Unsuccessful       00:00:00.2696941
Not Executed    Unit Test   FTP_Test_Sucessful          00:00:00

FTP接続を「リセット」するにはどうすればよいので、FTP_Test_Unsuccessful実際に接続を正しくテストします。

これが私の単体テストです:

'''<summary>
'''basic Unsuccessful FTP test
'''</summary>
<TestMethod()>
Public Sub FTP_Test_Unsuccessful()
    _TestSettings.FTPEnabled = True
    _TestSettings.ChangeFTPCredentials("User", "BadPasword")
    Try
        Assert.IsFalse(_TestSettings.TestFtpSettings())

    Catch ex As AssertFailedException
        Throw 

    Catch ex As Net.WebException
        Dim FTPResponse As FtpWebResponse = DirectCast(ex.Response, FtpWebResponse)
        Assert.AreEqual(FtpStatusCode.NotLoggedIn, FTPResponse.StatusCode)

    Catch ex As Exception
        Assert.Fail()
    End Try
End Sub

'''<summary>
'''basic Sucessful FTP test
'''</summary>
<TestMethod()>
Public Sub FTP_Test_Sucessful()
    _TestSettings.FTPEnabled = True
    _TestSettings.ChangeFTPCredentials("User", "GoodPasword")
    Assert.IsTrue(_TestSettings.TestFtpSettings())
End Sub

そして、ここに関連するコードがあります:

Public Function TestFtpSettings() As Boolean
    Dim FTPConnectionTestedSuccessfully As Boolean = False
    Dim response As FtpWebResponse = GetTestFtpResponse()
    Dim StatusCode As System.Net.FtpStatusCode = response.StatusCode
    response.Close()
    FTPConnectionTestedSuccessfully = (StatusCode = Net.FtpStatusCode.OpeningData)

    Return FTPConnectionTestedSuccessfully
End Function

Private Function GetTestFtpResponse() As FtpWebResponse
    Dim request As FtpWebRequest = GetFTPConnection(WebRequestMethods.Ftp.ListDirectory)
    Dim response As FtpWebResponse = GetFTPResponse(request)

    Return (response)
End Function

Private Function GetFTPConnection(Method As String) As FtpWebRequest
    'Get the object used to communicate with the server.

    Dim FTPAdress As Uri = New Uri(String.Format("ftp://{0}:{1}", _
                                                 Me.FTPServerName, _
                                                 Me.FTPPort))

    Dim request As FtpWebRequest = DirectCast(WebRequest.Create(FTPAdress),  _
                                              FtpWebRequest)

    request.Method = Method
    request.Credentials = New NetworkCredential(Me.FTPUserName,
                                                Me.GetDecryptedPassword)
    Return request
End Function

Public Function GetFTPResponse(request As FtpWebRequest) As FtpWebResponse
    Return DirectCast(request.GetResponse(), FtpWebResponse)
End Function
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