puts "============"
puts "OCC27179"
puts "============"
puts ""
###############################
## The algorithm of sharing edges in Boolean operation should be improved
###############################

plane pl 0.195808075898442, -0.229262227170656, 4.05546403129991 0 0 1
psphere s1 pl 0.03101752454
restore [locate_data_file bug27128-Helix_Pipe.brep] s2

settolerance s1 2.0e-6

explode s1 f
explode s2 f

bsection result s1_1 s2_2

smallview
donly s1
fit
donly result

if { [string compare -nocase [checksection result] " nb alone Vertices : 0\n\n"] } {
  puts "ERROR: the section is not closed"
} else {
  puts "The section is OK"
}

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