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NullReferenceException for Log.WriteLine

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dan
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dan asked on 10 Jul 2016, 11:53 AM

Hi,

 

In my project I have two tests, one for 'Accounts' and another for 'Advanced Find'

The 'Accounts' test has a coded step..

    public void SelectAccountTypeByName(String typeName, Browser xframe)
        {

 

 

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dan
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answered on 10 Jul 2016, 12:06 PM

My apologies, I accidentally posted before I was finished. I will try again ..

 

Hi,

 

In my project I have two tests, one for 'Accounts' and another for 'Advanced Find'

The 'Accounts' test has a coded step..

    public void SelectAccountTypeByName(String typeName, Browser xframe)
        {
some code
Log.Writeline("hello world");

}

When my 'Accounts' test executes this coded step, it executes successfully.

However, if in the 'Advanced Find' test I attempt to use this coded step as follows..

Accounts xaccount = new Accounts();
        xaccount.SelectAccountTypeByName("random", Account_contentIFrame0);

The 'Log.WriteLine("hello world")' results in..

System.NullReferenceException: Object reference not set to an instance of an object.
   at ArtOfTest.WebAii.Design.BaseWebAiiTest.get_Log()
   at TestProject2.Accounts.SelectAccountTypeByName(String typeName, Browser xframe) in f:\New folder\Test Studio Projects\TestProject2\Accounts\Accounts.tstest.cs:line 148
   at TestProject2.Advanced_Find.Select_Type_Random1() in f:\New folder\Test Studio Projects\TestProject2\Advanced Find\Advanced Find.tstest.cs:line 201

If I comment out the Log.WriteLine, the coded step executes fine.

Your help would be appreciated.

thanks,
dan

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Boyan Boev
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answered on 13 Jul 2016, 02:36 PM
Hello Dan,

Is the Log.WriteLine in a coded step (in the second test)?

Is there a chance you can send us your project so we can review it?

Hope to hear from you soon.

Regards,
Boyan Boev
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dan
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answered on 18 Jul 2016, 11:09 AM

Hi Boyan,

Yes, it is in a coded step. I've attached the project.

 

thx,

dan

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Boyan Boev
Telerik team
answered on 20 Jul 2016, 12:26 PM
Hi Dan,

I assume that the issue is that Log.WriteLine method accept only sting so you should change your code as follows:
Log.WriteLine("Select option: " +newIndexx.ToString()+ " of "+AccounttypeISelect.Options.Count.ToString());

However I cannot confirm this since I cannot execute your test.

The other options is that some of the variables you want to WriteLine does not exists in the current context.

Hope that helps.

Regards,
Boyan Boev
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dan
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answered on 20 Jul 2016, 12:43 PM

Hi Boyan,

Thanks for your suggestion, but the problem is not with the variables I'm attempting to log. I get the exception when using just Log.WriteLine("Hello world").

As I noted before, if the coded step includes 'Log.Writeline("hello world")', then the  'Accounts' test executes the coded step successfully. But, if in the 'Advanced Find' test I attempt to use this coded step as follows..

Accounts xaccount = new Accounts();
        xaccount.SelectAccountTypeByName("random", Account_contentIFrame0);

The presence of  'Log.WriteLine("hello world")' results in the exception. If I comment it out, then xaccount.SelectAccountTypeByName("random", Account_contentIFrame0) also executes successfully.

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Boyan Boev
Telerik team
answered on 25 Jul 2016, 08:11 AM
Hello Dan,

I am not able to reproduce this issue. I am able to start every test from the project you've sent me.

See this video for a demonstration.

Could you please creating a new test and copy all the steps from the previous one to the new one?

Please record a short video demonstrating the exact issue.

Thank you!

Regards,
Boyan Boev
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dan
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answered on 25 Jul 2016, 06:36 PM
Hi Boyan,
I’ve attached a simplified project that demos the issue.

You’ll notice WebTest1 passes, but WebTest2 fails on Log.WriteLine(“hello world”) ...

Failure Information: ~~~~~~~~~~~~~~~Exception thrown executing coded step: 'New Coded Step'.InnerException:System.NullReferenceException: Object reference not set to an instance of an object.   at ArtOfTest.WebAii.Design.BaseWebAiiTest.get_Log()   at LogWrteLineIssue_Demo.WebTest1.enterSearchText(Browser xbrowser) in c:\Users\odacrd\Documents\Test Studio Projects\LogWrteLineIssue_Demo\WebTest1.tstest.cs:line 54   at LogWrteLineIssue_Demo.WebTest2.WebTest2_CodedStep() in c:\Users\odacrd\Documents\Test Studio Projects\LogWrteLineIssue_Demo\WebTest2.tstest.cs:line 53

Once you comment out the Log.WriteLine(“hello world”) in WebTest1.tstest.cs:line 54, then both WebTest1 and WebTest2 pass.

Thanks,
dan
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Boyan Boev
Telerik team
answered on 28 Jul 2016, 10:53 AM
Hi Dan,

Now I understand what is going on exactly.

Unfortunately you cannot crate instances of other tests and call it like this. There is no Manager initialized e.t.c.

You can create a standalone code file where you can implement your own methods and call them in any test you want.

I have modified the project you have sent me with a such file for a demonstration.

Hope that helps.

Regards,
Boyan Boev
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dan
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answered on 28 Jul 2016, 12:45 PM

Excellent! Thanks Boyan. I'll give that a try.

Cheers,

dan

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Boyan Boev
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answered on 29 Jul 2016, 01:05 PM
Hello Dan,

You are most welcome.

Please give that a try and let me know the results.

Regards,
Boyan Boev
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dan
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answered on 29 Jul 2016, 01:33 PM
Perfect. You guys rock!!
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