Object reference not set to an instance of an object

Question

Object reference not set to an instance of an object

Opened this issue 8 years ago · 15 comments

I've installed the this plugin before installing the OpenCover application and i'm receiving this message all the time i try to execute the unit tests in OpenCover Test Explorer.

I've tryed to execute the Visual Studio in Administrator mode but don't works again.

Answer 1 · 2016-06-18T11:45:43.000Z

Hi @mvleandro, you can still set the path of OpenCover if you installed the plugin first: this page shows how to configure it: https://github.com/OpenCoverUI/OpenCover.UI/wiki/Release-Notes#new-settings-page
That should fix the issue

Answer 2 · 2016-06-24T18:25:11.000Z

I have the same problem and I set the path for opencover-console.exe and for nunit3-console.exe in visual studio tools-->options-->OpenCoverUI.

Answer 3 · 2016-06-25T07:42:51.000Z

Can you see any more details or a stack trace in the output window? It has an OpenCoverUI option in the combobox that shows OpenCoverUI details and errors.

Answer 4 · 2016-06-26T15:02:33.000Z

@pver thanks for your help.

I have this configuration in my VS2015:

I have this error:

And this is my output window

Just it tells me that I have 13 tests, but no errors.

Answer 5 · 2016-06-28T08:29:23.000Z

Hi @ComptonAlvaro , this might be an issue in combination with a newer version of OpenCover, I'll see if I can reproduce this issue with the version you are using

Answer 6 · 2016-06-28T14:21:12.000Z

Thanks for your help.

By the moment could you tell me what version of OpenCover could I use to run the the tests?

EDIT: I have tried with the version 4.6.166 (2015-07-18) and I have the same problem.

Answer 7 · 2016-06-28T16:10:13.000Z

Hmm, that's strange, I use version 4.6.192 without a problem, so it's probably something else. Are you using the same nunit version in your unit tests as the version you configured in the configuration options?
Could you create a small test project you could share that reproduces the issue?

Answer 8 · 2016-06-28T16:23:57.000Z

I have tried to uninstall all nuget packages (NUnit and openCover) and I have installed the version 3.4.0 of NUint and the last version of OpenCover. In the configuration options of VS2015 Community I have selected the nunit3-console.exe and the openconver.console.exe.

Answer 9 · 2016-06-28T16:54:03.000Z

Hello,

I tryed to install NUnit, i setted the path correctly but i still receiving
the same message )=

Abraços,
Marcus Vinicius

On Tue, Jun 28, 2016 at 1:23 PM, ComptonAlvaro notifications@github.com
wrote:

I have tried to uninstall all nuget packages (NUnit and openCover) and I
have installed the version 3.4.0 of NUint and the last version of
OpenCover. In the configuration options of VS2015 Community I have selected
the nunit3-console.exe and the openconver.console.exe.

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Answer 10 · 2016-06-28T17:00:35.000Z

I have noticed that when I right click a test in the test window, the option run selected tests with opencCover is disabled.

Answer 11 · 2016-06-28T17:51:26.000Z

I have created a new project and it works, so I guess my problem is with my project. I will try to find the reason of the problem.

Answer 12 · 2016-06-28T18:26:32.000Z

Thanks for further testing this @ComptonAlvaro ! If you find something specific, feel free to let us know, we could then add extra checks or error messages to avoid the cryptic error you receive now

Answer 13 · 2016-06-29T10:56:58.000Z

This is what I do. First, I get the .exe that needs OpenCoverUI, the nunit3-console.exe and the OpenCover.console.exe and copy in a common folder because I want to use with many solutions and this files is set in the settings of VS2015. So I copy in d:\programs\NUnit and d:\programs\OpenCover folders, and use this path in the settings.

Later I delete the hidden folder .vs that exists in my solution folder. Open the OpenCover explorer and refresh, so it finds many tests. I right click of them and run it. I can run it. If I try again, I get the same problem.

I close VS2015, I delete de .vs hidden folder and open the solution again. I can refresh to find the tests and I can run one of them. When I try to run again the test, I get the same error.

So it seems that is something related with the .vs folder. But it is not useful my solution because I only can run one test and I have to exit and run VS2015 each time.

So the problem really is not solved, just it seems to be related with .vs folder.

Answer 14 · 2016-06-29T15:41:27.000Z

I have solved my problem. I had VS2015 update 2 and now I have installed the update 3 and now I can run all the tests and I have no problems. I guess the update 3 has repair my VS2015 installation.

Thanks for your help and the good work with this tool.

Answer 15 · 2016-06-29T16:38:35.000Z

Thanks for the detailed description @ComptonAlvaro ! This could really help people why experience the same issue in the future, so I'll leave this ticket open for now so people could easily find it