Why does visual studio 2012 not find my tests?

Question

I have some tests that use the built in Microsoft.VisualStudio.TestTools.UnitTesting, but can not get them to run.

I am using visual studio 2012 ultimat

Answer 1

I ran into the same issue while trying to open the solution on a network share. No unit test would be detected by Test Explorer in this case. The solution turns out to be:

Control Panel -> Internet Options -> "Security" Tab -> Click "Intranet" and add the server IP address or host name holding the network share to the "Sites" list.

After doing this, I recompiled the solution and now tests appeared. This should be quite similar to the answer made by @BigT.

Answer 2

I sometimes get the same symptoms.

What I did is:
1. Closed the Test Explorer window
2. Cleaned the solution
3. Rebuild the solution
4. Relaunched Test Explorer window from Test -> Windows -> Test Explorer.

And I got my test in Test Explorer window.

Answer 3

I was experiencing this issue many times when I try to build the solution in a different PC.

I am using NUnit and Specflow as well. By default My test project targets X86 But I have to change this to X64. Steps are 1. Test Menu -> Test Setting -Default Processor Architecture -> x64. 2. Clean Build 3. Build 4. If still tests didn't show up. 5. Go to Tools  Extensions and Updates Then Install NUnit and Specflow libraries 6. Clean Build 7. Build

Then usually test will showed up in Test Editor.

Answer 4

I was getting the error: "Failed to initialize client proxy: could not connect to vstest.discoveryengine.exe."

Try to run Visual Studio as Administrator. That worked for me.

There is another Stack Overflow post discussing this error, and the same solution works for them. The question remains why this works.

Answer 5

From menu bar on top...

Test -> Run -> All Tests

You may also view all tests from Test Explorer (Test -> Windows -> Test Explorer)

Further with VS 2012, if you miss out anything try searching it using Quick Launch bar on top right (Ctrl + Q) "Test"

Hope this helps.

Answer 6

A problem I've found is that tests don't get found in the Test Explorer (nothing shows up) if the solution is running off a network drive / network location / shared drive

You can fix this by adding an environment variable.

COMPLUS_LoadFromRemoteSources and set its value to 1