Extract the call to the code under test to its own method
If the method to be tested requires a lot of parameters or prepared data, it can help to extract the call to it to a helper method of its own that defaults the uninteresting parameters:
METHODS map_xml_to_itab
IMPORTING
xml_string TYPE string
config TYPE /clean/xml2itab_config DEFAULT default_config
format TYPE /clean/xml2itab_format DEFAULT default_format.
METHOD map_xml_to_itab.
result = cut->map_xml_to_itab( xml_string = xml_string
config = config
format = format ).
ENDMETHOD.
DATA(itab) = map_xml_to_itab( '<xml></xml>' ).Calling the original method directly can swamp your test with a lot of meaningless details:
" anti-pattern
DATA(itab) = cut->map_xml_to_itab( xml_string = '<xml></xml>'
config = VALUE #( 'some meaningless stuff' )
format = VALUE #( 'more meaningless stuff' ) ).