Verifying passed arguments partially

Recently, I was working on a project and I missed a case in unit tests. I didn’t want to verify each argument but rather wanted to check if an object has a certain attribute set. In the older versions of mockito, this wasn’t doable. Since mockito 2.1, you can now do argument verification through argThat. Let’s see an example of this in action.

@Test
public void testWritesWithAttributes(){
  final String myExpectedId = "expected-id"
  final Timestamp myExpectedTimestamp = Timestamp.from(Instant.now())
  final MockData mockData = new MockData();
  mockData.setId(myExpectedId);
  mockData.setEvent(MyEvent.builder().timestamp(myExpectedTimestamp).build());
    
  myMockService.saveMyData(mockData);

  verify(myDao).writeSomeData(
      argThat(id -> id.equals(myExpectedId)), anyLong(), 
      argThat(event ->  event.getTimestamp().equals(myExpectedTimestamp)));
} 

As you can see, I’m only looking for the attributes I’m interested in. I can skip the others and verify the attributes I should.