IntelliJ警告：为varargs参数创建未选中的泛型数组

Question

IntelliJ Idea is giving following warning for one of the statements in my test cases.

Warning: Unchecked generics array creation for varargs parameter

Signals places where an unchecked warning is issued by the compiler

All I am doing is :

when(someService.someMethod(id)).thenThrow(AccountNotFoundException.class)

Answer 1

A better way to accomplish that would probably be:

when(someService.someMethod(id)).thenThrow(new AccountNotFoundException());

then the compiler should infer the type correctly.

If someService.someMethod(id) has return type void you can do:

doThrow(new AccountNotFoundException()).when(someService).someMethod(id);

Please refer to the official Mockito documentation for examples like this using thenThrow . The documentation is very clear on this point.

You can also check the following StackOverflow question which is very similar (if not an exact duplicate):

How to mock and assert a thrown exception