StrataFrame Forum » StrataFrame Application Framework - V1 » Business Objects and Data Access (How do I?) » XMLBasic error in testing but not in application

XMLBasic error in testing but not in application

Chan — Sun, 29 Jun 2008 11:16:09 GMT

Hi,
I hit error below when I run it from NUnit. However, it is working fine if I run it from my windows application. Any ideas?

[codesnippet] [Test]
public void TestPlugInInfosBOFillAll()
{
PlugInInfosBO loPlugInInfosBO = new PlugInInfosBO();
loPlugInInfosBO.FillAll();

Assert.AreEqual(2, loPlugInInfosBO.Count);
}
[/codesnippet]
Error 29 TestCase 'TestPlugIn.TestPlugInInfosBOFillAll' failed: Object reference not set to an instance of an object.
System.NullReferenceException
Message: Object reference not set to an instance of an object.
Source: MicroFour StrataFrame Base
StackTrace:
at MicroFour.StrataFrame.Xml.XmlBasics.OpenXmlFile(String TableName, String PathAndFileName, List`1 ColumnStructure)
at JK.Framework.Business.XMLBusinessLayer.FillAll() in F:\Projects\JKFramework\JK Framework Business\Business\XMLBusinessLayer.cs:line 98
at TestPlugIn.TestPlugIn.TestPlugInInfosBOFillAll() in F:\Projects\JKFramework\Test\TestPlugIn\TestPlugIn\TestPlugIn.cs:line 135 F:\Projects\JKFramework\JK Framework Business\Business\XMLBusinessLayer.cs 98

RE: XMLBasic error in testing but not in application

Trent L. Taylor — Sun, 29 Jun 2008 11:16:09 GMT

That makes sense. You can use a different mecahnism to provide the version to prevent this error. We actually have a shared class with constants for version for this type of thing so as to prevent these types of errors. That me be an idea to prevent this from happening since there is not an entry assembly. I am sure that if you us the executing assemby it would work, but you might still want to use a constant instead.

RE: XMLBasic error in testing but not in application

Chan — Sun, 29 Jun 2008 03:18:56 GMT

Hi,
I have found out the cause. It is because I called OpenXMLFile(TableName, PathAndFileName, ColumnStructure), which internally retrieve currentversion using code System.Reflection.Assembly.GetEntryAssembly().GetName().Version.ToString(). In unit test environment, this code always return nothing.

RE: XMLBasic error in testing but not in application

Trent L. Taylor — Sat, 28 Jun 2008 23:49:19 GMT

Obviously this is going to be really hard for me to diagnose over this post. I do not have much experience with nUnit; however, we do use unit testing through Team Foundation...however, I do not think that we have a test setup pulling from an XML file. So I cannot give you a 100%, "I know this works" answer. But it does seem suspect. The OpenXmlFile is a shared or static method...so I wonder if the AppDomain has not been properly established at the point of execution.

The first thing I would do is determine which object or reference is producing the NullReferenceException. Then it might give you/us a clue as to where to look to come up with a solution.