Testning With Android Studio: Noclassdeffounderror: Org/testng/testng

So I am trying to use the built in testTool to generate some test for my mainActivity, so far I have managed to generate a test class and I got empty methods in it to test the meth

Solution 1:

Check your module structure. Probably one of your high level module folders doesn`t have dependencies. (You can link modules together and everything should work).

Go to -> File|Project structure|Modules|*your module*|Dependencies. It's not a TestNG issue, it's a module structure issue.

More detailed description Click This -> Link

Solution 2:

Try changing

testCompile 'junit:junit:4.12'

to

androidTestCompile 'junit:junit:4.12'

Also, make sure you are running it as an Android Test.