Tests not running in Test Explorer

Question

I am currently working on a solution that has currently 32 Unittests  I have been working with the resharper test runner - which works fine  All tests are running  all tests are showing the right test outcome  However  the tests are not running when using the Visual Studio test explorer  The Test Explorer is showing all unit tests  but once clicking on  quot Run All quot   all tests are getting greyed out and show no result of the test run    All test classes are public All test classes are having the  TestClass  attribute declared All test methods are using the  TestMethod  attribute Both the productivity code and the test projects are targeting  NET 3 5  I have already tried to clean build my solution  and   or delete all obj  bin  Debug and Release folders  I d appreciate any hints which would explain this behaviour

User · Answer

Try removing the  Ignore  attribute from above the test method

User · Answer

Yet another ridiculous case  it somehow happened that two projects in the same solution had the same ProjectId - one of those was a test project and that confused Test Runner  Removing and readding test projects to the solution changed the ProjectId and fixed the issue

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Here it was the test project was not marked to be built    Build -  Configuration Manager    -  check build for your test project

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Well i know i am late to the party  but logging my answer here   incase  someone is facing similar issue as mine  I have faced this issue many times  90  it gets solved by these two steps project  gt  properties  gt  Build  gt  Platform target  gt  x64  x32   Test - gt  Test Settings  gt  Default Processor Architecture  gt  X64  x32   However i found one more common cause  The Solution files often change developer systems and they start pointing to wrong MSTest TestAdapter  Especially if you are using custom path of nuget packages  I solved this issue by  Opening the  csproj file in notepad   Manually correcting reference to MSTest TestAdapter in import instructions like this

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For me  not quite a solution  it was deselecting the  testsettings file in the Menu  Test -  Test Settings -   current File   to uncheck the currently used file   In my case it starts so     lt TestSettings name  Local  with code coverage   id  e81d13d9-42d0-41b9-8f31-f719648d8d2d  xmlns  http   microsoft com schemas VisualStudio TeamTest 2010  gt     lt Deployment gt       lt DeploymentItem filename  ConfigurationImportExportTest Configurations     gt       lt DeploymentItem filename  output Debug     gt     lt  Deployment gt     lt Execution gt    Apparently the DeploymentItem interferes   because this was in the Output tab   Warning  Test Run deployment issue  The assembly or module  Microsoft SqlServer Management SqlParser  directly or indirectly referenced by deployment item  output Debug   specified by the test settings was not found       more of the same   It does not tell me lots  Seems like it has to do with the way that all projects put their compilation products in a common  output Debug folder  however that seems not to hinder it  It puts out another warning mentioning things like  A testsettings or runsettings file with  ForcedLegacyMode   TRUE or VSMDI files are not supported by MSTest-V2    That seems to stop it

User · Answer

What fixed it for me was upgrading the MS Test nuget packages

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I had same issue after update to Visual Studio 16 4 1  Go to Test explorer -  Settings button -  Processor Architecture for AnyCPU projects -  x64

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There are already a lot of answers to this question  but I had a different scenario and resolution    We moved functionality of a type being tested from one class to a new class  and as such created a new test class  with the old test class ending up being empty   Original    Old test class   Test initialize method Test methods    Broken    Old test class  initializer kept  class kept as placeholder for future    Test initialize method  remains  by itself  No test methods  the original test methods appear in test runner but don t exist in code so never execute   New test class   Test initialize method Test methods    Fixed    Old test class  removed  New test class   Test initialize method Test methods    Clean the project  close Visual Studio  delete the TestResults folder  then restart VS  then rebuild the project   This alone might fix your problem  but for me didn t suffice until a deleted the old test class

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This issue is also observed when the test method being run throws a StackOverflowException  making the test runner abort the test run  resulting in the output 0 tests run   To find the culprit and solve it put a break point at the start of both TestInitialize and TestMethod decorated methods  run the unit test in debug mode  proceed stepping over  F10  until the exception is thrown

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Check what framework the tests are written against  e g  nunit  xunit  VS test  etc   and make sure you ve got the correct test adapter runner extension installed    For me it was NUnit 3 Test Adapter that was missing and I confirmed the version number required by looking at the nunit framework dependency version  select the  dll in the Dependencies tree in Solution Explorer and hit F4 to bring up the Properties window

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I had a different solution to get my tests to run  My global packages folder didn t match what was in my  csproj This is what my  csproj looked like   I had to change my Version to 16 5 0 which i found was installed in my global packages folder  Now my tests are able to run

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I solved my problem completely different to any of the solutions in here   Each of my tests made a call to a function which in turn called itself meaning it d not terminate   public GoogleIntent CreateIntent BotPath botpath        return CreateIntent botpath

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Have tried many options with Visual Studio 2019 Version 16 4 6 and  Microsoft VisualStudio TestTools UnitTesting  but for now the only way to run tests successfully was by invoking next command in console  dotnet test   Tests are discovered in Test Explorer but outcome is  Not Run    Updating Visual Studio did not help   Have resolved issue with  No test matches the given testcase filter FullyQualifiedName  by running updates to latest version for next packages   Microsoft NET Test Sdk MSTest TestAdapter MSTest TestFramework

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TLDR  Update the testing packages  look into the output - gt  test console  I struggled with this for a day and a half  so here s what I did to solve it  Symptoms  5 Unit test projects  all discoverable in TestExplorer 2 out of 5 executed properly 3 stating not run at all The problem started after a  net framework update  Investigation Since all the packages were updated during the  net framework update  I started with the differences between the working and not working projects  The first clue was that all 3 projects were using  MSTest TestAdapter and MSTest TestFramework Naturally I went to the - gt   Output console - gt  Test dropdown in VS 2019 and looked at the output  Nothing useful there  Step one of the solution  Update the MSTest TestAdapter and MSTest TestFramework to version 2 0 0 Step two of the solution  Now the Output console - gt  Test dropdown output started showing one after the other  missing packages and wrong binding redirects Step three of the solution  Manually add the missing packages  For me those were  System Runtime Extentions System Reflection Maybe some more that I m missing  Step 4 of the solution  Removed Fixed the unnecessary binding redirects  I hope this will help someone else

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What works for me is to delete the bin folder  then rebuild the project

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If your projects aren t all AnyCpu then you may also want to check that the following 2 settings match     Right click test project  -  properties -  Build -  Platform target - e g  x64  Main Menu  -  Test -  Test Settings -  Default Processor Architecture -  X64   I found that when these didn t match my test project would silently fail to run

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Clean-Rebuild solution worked for me

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In my case I had an async void Method  and I replaced with async Task  so the test run as i expected         TestMethod      public async  void SendTest       replace with         TestMethod      public async  Task SendTest

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I had to change my async test methods to return Task instead of void    The tests were then active and runnable in Test Explorer

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I had the same issue  but mine was resolved when I created a working copy on my actual desktop   The issue for me was because of the project folder was located on a network drive  and the dependencies were not able to load across the network drive for some reason   Hope this helps someone

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I had same symptoms   Please ensure you have the proper Visual Studio extension installed via Tools - Extensions and Updates   In my case  I had to install XUnit and Specflow from the Online option   Then clean the solution and rebuild it   If that still doesn t help  clear your temp directory  search for  temp  in the Start menu search and delete all contents in Temp   And then finally try uninstalling Resharper which finally fixed my problem

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It is worth mentioning that sometimes NUnit Test Adapter files get corrupted in user folder C  Users User  AppData Local Temp VisualStudioTestExplorerExtensions NUnit3TestAdapter 3 8 0 build net35 NUnit3 TestAdapter dll on Windows 10 and that causes Test Explorer to stop working as it should

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I found that in the project it was not referencing the Microsoft VisualStudio QualityTools UnitTestFramework assembly   Instead  it was referencing Microsoft VisualStudio TestPlatform TestFramework and Microsoft VisualStudio TestPlatform TestFramework Extensions   When I removed those two references and added the reference to the Microsoft VisualStudio QualityTools UnitTestFramework assembly the tests that were previously marked with the blue exclamation point suddenly became active and started working

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Install Nunit3TestAdapter Nuget has solved this problem

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I changed  Debug  to  Release  and it worked again  Any CPU

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I had similar symptoms as OriolBG with the stack  Net Core xUnit FluentAssertions but for me updating the Microsoft NET Test Sdk nuget package for the project did the trick

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Had same issue after clean install of VS 2019  Tests are found but not run with  Unexpected error occurred   Fixed by setting up x64 instead of x86 which was selected by default

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For me solution was to change the Resharper Unit Testing settings  Default platform architecture  to  x64

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In my case it worked to update the MSTest nuget packages  Could reproduce this problem even on blank MSTest project and updating the packages worked

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I am using XUnit and was missing the xunit runner visualstudio package  Installing it and my tests ran

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I use VS2019 with  Net 4 7  I installed NUnit extension v3  and changed the Test settings to use X64  My unit test project is Any CPU  would work if I changed it to x64   Now I can debug through my code

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If you are using NUnit rather than MSTest then you will need the NUnit Test Adapter Extension for Visual Studio 2012 2013

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I had different version of NUnit  3 11 0  and NunitTestAdapter  3 12 0  nuget packages  When I updated NUnit to 3 12 0  Visual Studio ran tests

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Had the same symptoms  in my case it was the dotnet core SDK version that was the problem   The projects was targeting 2 2  and was able to build using 3 0  After installing newest 2 2 SDK version they were able to run

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Setting Processor Architecture for AnyCPU Projects in Test Explorer fixed my issue  See screenshot above

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Check in your project file for references to NUnit of different versions   In my case  I had installed version 3 11 0 of both NUnit and NUnit3TestAdapter  but there were old references to version 2 6 4  in the project file  that weren t removed with the new installation      Solution  Recomended to fix references issues  see docs    Reinstall NUnit and NUnit3TestAdapter  this fixed the references in my project    PM gt  Update-Package NUnit -reinstall     PM gt  Update-Package NUnit3TestAdapter -reinstall    Solution 2  In case of reinstalling didn t fix the references    Uninstall and install NUnit and NUnit3TestAdapter    PM gt  Uninstall-Package NUnit     PM gt  Uninstall-Package NUnit3TestAdapter     PM gt  Install-Package NUnit     PM gt  Install-Package NUnit3TestAdapter

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In my case  it was because one test project in my solution had the MSTest TestFramework and MSTest TestAdapter nuget packages installed but the others did not  These packages were apparently not required to run tests until one project in the solution had them installed   The issue was fixed by installing those packages on test projects missing them

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Same issue  What was actually happening was that the test running was trying to discover tests in a web site project I have loaded  there was some jasmine specs for angular inside the site    This was causing the runner to hang trying to load some NodeJS Container Updating containers from Microsoft NodejsTools TestAdapter TestContainer  I removed the website from the solution  obviously  just the solution  not deleting the website   I also had some corrupt configuration data that I had to clear out under the TestStore folder in the  vs directory   After completing these two steps things magically started working again

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Right click on the file in your solution explorer and make sure it s build action is set to  C  Compiler   Solution Explorer --  Right Click File --   Properties  --  Build Action    C  Compiler

User · Answer

Upgrade your test project to the latest target framework version   I was using Visual studio 2019 with target framework 4 5 whose support ended in 2016  jumping to 4 7 solved my problem

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For me restarting VS2017 did not work   I had to clean sln then found a file with tests that didn t run and run that file only   After that I did run all and it worked normal again

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You can view the error-output of your test runner by opening the Output panel  view-- output  and choosing  tests  from the  Show output from  dropdown      Additionally  if you have Resharper installed you can open a test file and hover over the test-circle next to a test to get additional error info    Clicking that will bring you to a window with more detailed information   Alternatively  you can open that window by going to Extensions --  Reshaper --  Windows --  Unit Test Exploration Results

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I had a slightly different scenario  but this is the top Google result so I ll answer my issue too  I could run the tests but only about half of them actually ran  with no error output    Eventually I debugged and stepped through all the tests  and came upon a Stack Overflow Error when creating Test Instances of some models   In the test instance methods  a child model created a parent and the parent created a child  which created an infinite loop  I removed the parent creation from the child  and now all my tests work

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I can tell from your attributes that you re using MSTest  I had a similar issue  my tests were showing up in the Test Explorer  but when I would try to run them  either by choosing Run All or individually selecting them  they would not   My problem was that I had created the unit test project manually from an empty  NET Standard Class Library project  I had installed the MSTest TestFramework NuGet package  but not the MSTest TestAdapter package  As soon as I installed the adapter package  they ran as expected   Seems obvious in retrospect  but when you create unit test projects from a template  you take these things for granted

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For me this was caused by a VS extension for measuring code coverage  It could not reference a particular assembly  and therefore would not run any of the tests  Tests would run fine from the command line using   dotnet test   To solve this issue  you can opt to have ALL dependencies copied to your Test project debug folder  This ensures that any assemblies can be resolved  as  unused  assemblies are not removed  You can add the following to your Test projects  csprog file    lt PropertyGroup gt       lt CopyLocalLockFileAssemblies gt true lt  CopyLocalLockFileAssemblies gt   lt  PropertyGroup gt

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For me having a property called TestContext in a base class was causing this behavior  For example    TestClass  public abstract class TestClassBase       protected object TestContext   get  private set        TestClass  public class TestClass   TestClassBase          This method not found      TestMethod      public void TestCase

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I had this issue and for me it was caused by having multiple Test Projects with different versions of     MSTest TestAdapter MSTest TestFramework   Consolidating the nuget packages for the projects so they were the same resolved the issue for me

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Since I got here with this kind of error I post my problem solution   Symptoms    Not all tests running  but they didn t depend per project  just some of them were executed  All executed ones were green  Tech stack  dotnet core   XUnit   FluentAssertions All tests detected and updated if it changed  By selection or running  Not runned tests  several times they could be executed    Problem   There was an error in the code that throw an exception inside another thread  All test assertions passed but it cancelled the test execution  I could see the error in the  Tests output   NullException

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I had the same problem in VS 2017  In my case it solved by restarting VS

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