OCCT

restore [locate_data_file bug29481_ex1.brep] s
explode s f

# removal of the step
removefeatures result s s_6 s_18
checkshape result
checkprops result -s 461.315 -v 196.178 -deps 1.e-7
checknbshapes result -vertex 29 -edge 47 -wire 22 -face 19 -shell 1 -solid 1
CheckIsFeatureRemoved s_6 {v e f}
CheckIsFeatureRemoved s_18 {v e f}

# get history of the operation
savehistory rf_hist

# check modification of the top face
modified m1 rf_hist s_1
checkprops m1 -s 172.551
checknbshapes m1 -vertex 13 -edge 13 -wire 3 -face 1

# check modification of the side face
modified m19 rf_hist s_19
checkprops m19 -s 10
checknbshapes m19 -vertex 4 -edge 4 -wire 1 -face 1

checkview -display result -2d -path ${imagedir}/${test_image}.png