the method when(t) in the type mockito is not applicable for the arguments (void)

Hello! That error message typically comes up when you're trying to use the Mockito 'when()' method on a method that doesn't return a value, or a void method. The 'when()' method is used to stub a return value for certain method calls during testing, so it needs a non-void method.

If you need to stub a void method, you should use the 'doReturn()', 'doThrow()', or 'doAnswer()' methods from Mockito. These methods are designed to deal with void methods for testing, allowing you test your void methods in different scenarios.

Absolutely! Here's a basic example: ```java doThrow(new RuntimeException()).when(yourObject).yourVoidMethod(); ``` This will cause a RuntimeException to be thrown whenever 'yourVoidMethod()' of 'yourObject' is called during the test.