Code Coverage of a Selenium Test

Question

I have installed OpenCover through nuget.

This is the line I'm running from my Command Prompt

C:\myapp\Main\packages\OpenCover.4.6.519\tools\OpenCover.Console.exe -target:"C:\Program Files (x86)\NUnit 2.6.4\bin\nunit-console.exe" -register:user -targetargs:"C:\myapp\Main\myapp.SeleniumTests\bin\Debug\myapp.seleniumTests.dll /result=c:\TestRunner\SeleniumResults.xml /include:Single"

I can see that the test runs because FireFox opens up and it goes through all the necesary steps. but once its done I get "Visisted Classes 0 of 309"

I have tried adding

-searchdirs:"C:\myApp\Main\MainWebProject\bin"

but still it comes back with no coverage.

What am I missing?

Did you write any tests for your "Selenium tests"? OpenCover is looking at `myapp.seleniumTests.dll` as the Application Under Test. — SiKing, Apr 13 '16 at 20:27

score 1 · Answer 1 · answered Apr 14 '16 at 09:59

1

OpenCover only provides coverage of the .net assemblies that are loaded and executed by the target process and it's child processes.

I suspect your web application is not running in that context and as such even though your tests are running OpenCover is not actually profiling that code. So you need to run your web application in the same context - I recommend using iisexpress for this.

Now you may be thinking about the test assemblies and why aren't you getting coverage of those assemblies well should try using the /noshadow option with nunit-console.

answered Apr 14 '16 at 09:59

Shaun Wilde

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Is there any instructions on how to use iisExpress to run my web application in the same context? I look into the provided docs and there is no clear section for iisExpress – NicoTek Apr 14 '16 at 13:35
ok I found bit and pieces from other posts and was able to make it work. will post a complete script once its fully working. Thanks! – NicoTek Apr 14 '16 at 15:23
I'd have probably used Process.Start as some part of test setup or perhaps use a batch script to start iisexpress and then nunit and get OpenCover to run the batch script. – Shaun Wilde Apr 14 '16 at 21:53

score 0 · Accepted Answer · answered Apr 14 '16 at 15:41

Ok I was able to make it run. It's important that Visual Studio is closed, if not it will have trouble registering the site from iis express

first in the console I go to

cd c:\MyApp\Main\MainWebProject\Bin

the script came out to:

C:\MyApp\Main\packages\OpenCover.4.6.519\tools\OpenCover.Console.exe -target:"C:\Users\Me\Desktop\TestRunnerWithServer.bat" -register:user -searchdirs:"C:\MyApp\Main\MainWebProject\bin"

the file "TestRunnerWithServer.bat" has the following steps

del "C:\TestRunner\TestResults.xml"
del "c:\TestRunner\SeleniumResults.xml"

call "C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\vcvarsall.bat" x86

rem go to the folder of the project with the unit tests
CD C:\MyApp\Main\MyTestsProject\bin\Debug

rem Run Unit Tests
MStest /testcontainer:MyTestsProject.dll /resultsfile:C:\TestRunner\TestResults.xml

rem now start IIS Express in a different window
cd C:\Program Files (x86)\IIS Express\
start iisexpress.exe /site:MainWebProject /config:C:\MyApp\Main\.vs\config\applicationhost.config

CD C:\Program Files (x86)\NUnit 2.6.4\bin

rem Run Selenium Tests
nunit-console C:\MyApp\Main\MyApp.SeleniumTests\bin\Debug\MyApp.seleniumTests.dll /result=c:\TestRunner\SeleniumResults.xml /noshadow

rem Close IISExpress
taskkill /IM iisexpress.exe

Code Coverage of a Selenium Test

2 Answers2