#NEWLINE# def test_can_substract_value_from_field_day_and_compare( self ) : #NEWLINE# #INDENT# sut = expected . system_under_test #NEWLINE# expected = Q ( field__day = ( sentinel . VALUE - F ( 'field' ) ) ) #NEWLINE# actual = ( sut . day == ( sentinel . VALUE - sut ) ) #NEWLINE# self . assertEqual ( actual , expected )