Do I need to check when testing whether methods with the exact match on the desired object were called with refeq() or any() is enough?

Question

Java

Let's say I need to test the save method. Do I need to check that repository.save() is called on a specific object? Or any() is enough, like here?

@Test
void givenProductToAddShouldReturnAddedProduct() throws ProductAlreadyExistsException{
     //stubbing
     when(productRepository.save(any())).thenReturn(product1);
     productService.addProduct(product1);
     verify(productRepository,times(1)).save(any());

Or, for example, in testing controllers, do I need to check that the object received as a result of @RequestBody is passed to the service using refeq(), or can I safely call any() again.

Testing is new to me and I look at code examples I find on the internet and often see any(). And I am in a total misunderstanding whether I should have written refeq () everywhere.

Is there a checklist of what to check?

Answer 1

any() is used for mocks. Mocks don't check anything, mocks are conventions. Therefore, there is any().
If you want to check the saving in the database - you need to raise the database, save the object, get the saved object from the database and compare with the original one.