I have used Microsoft Unit testing to test one of my DNN modules (called Corporation). In the Unit Test project I have App_Code folder where are DataProvider.vb and SqlDataProvider.vb. The code of the test is very simple:

Imports System.Text
Imports System.Data.SqlClient
Imports Microsoft.VisualStudio.TestTools.UnitTesting

<TestClass()> Public Class UnitTestDNN

<TestMethod()> Public Sub FirstUnitTest()
Dim contr As New IGD.Corporation.CorporationController
Dim objTest As IGD.Corporation.Corporation

objTest = New IGD.Corporation.Corporation

objTest.id = 0

objTest.description = "TestDescription"
objTest.email = "test@test.com"
objTest.Website = "www.test.org"
objTest.cell = "404-555-0110"
objTest.phone = "404-555-0110"
objTest.fax = "404-555-0110"
objTest.Zip = "30301"
objTest.state = "US"
objTest.country = "GA"
'objTest.Zip = "30301"
objTest.address = "TestAddress"
objTest.name = "TestName"
objTest.city = "Atlanta"
objTest.Disabled = False
objTest.logo = String.Empty

'objTest = contr.GetCorporation(6)

If objTest IsNot Nothing Then
If contr IsNot Nothing Then
objTest.id = contr.SaveCorporation(objTest)

Dim corpC As New IGD.Corporation.CorporationController
Dim corp As IGD.Corporation.Corporation = corpC.GetCorporation(objTest.id)

Assert.AreEqual(objTest.name, corp.name)
Assert.AreEqual(objTest.Zip, corp.Zip)

End If
End If

The code for SaveCorporation is:

Public Function SaveCorporation(ByVal obj As IGD.Corporation.Corporation) As Integer
Return DataProvider.Instance().SaveCorporation(obj)
End Function

But, during debugging I have received the bug into SaveCorporation method: "Object reference not set to an instance of an object", although the objTest has values in all properties, and I can see them in debugger. How can I solve this? Thank you in advance for any help.

End Sub

End Class