java.lang.Exception: No tests found matching Method using Intellij IDEA

Question

I am experiencing a strange behavior of Intellij IDEA 2016.3. Having a class with method foo and a JUnit test for the method when I get java.lang.Exceptio

Answer 1

If you originally run a test named "foo", and then rename it to "fooBar", you must subsequently run "fooBar" with a new Run Configuration.

If you use the same original Run Configuration for "foo" to run "fooBar", it still looks for a test named "foo" which it does not find (thus the Exception) because it was renamed to "fooBar". The new Run Configuration would correctly look for "fooBar" test.

I made this mistake unknowingly because I renamed a test, but then just clicked the green run button in IntelliJ: Doing that runs the last Run Configuration, which in this scenario has the old "foo" name.