Verify Calls

Called once, and only once

Mockito.verify(service, Mockito.times(1)).method(ArgumentMatchers.any());

Called one or more times

Mockito.verify(service, Mockito.atLeastOnce()).method(ArgumentMatchers.any());

Never Called

Mockito.verify(service, Mockito.never()).method(ArgumentMatchers.any());

Called with a specific value

Mockito.verify(response, Mockito.atLeastOnce()).setContentType(
   ArgumentMatchers.same(MediaType.APPLICATION_PDF_VALUE));