puts "============"
puts "CR25436"
puts "Test case check work of the new commands vselnext and vselprev"
puts "============"
puts ""

proc check_highlighting { theEdgeIdx theCoords } {
  set aNext [expr ($theEdgeIdx + 1) % 3]
  set aNextNext [expr ($theEdgeIdx + 2) % 3]
  set hiColor [vreadpixel [lindex $theCoords [expr $theEdgeIdx * 2] ] [lindex $theCoords [expr $theEdgeIdx * 2 + 1] ] name]
  set nextColor [vreadpixel [lindex $theCoords [expr $aNext * 2] ] [lindex $theCoords [expr $aNext * 2 + 1] ] name]
  set nextNextColor [vreadpixel [lindex $theCoords [expr $aNextNext * 2] ] [lindex $theCoords [expr $aNextNext * 2 + 1] ] name]

  if {$hiColor == "CYAN 1" && $nextColor == "YELLOW 1" && $nextNextColor == "YELLOW 1"} {
    return true
  } else {
    return false
  }
}

set coords { }
# e10_x, e10_y
lappend coords 94
lappend coords 140
# e2_x, e2_y
lappend coords 103
lappend coords 60
# e1_x, e1_y
lappend coords 29
lappend coords 208

box b 10 10 10
vdisplay b
vfit
vselmode 2 1
vmoveto 30 101

if { ![check_highlighting 0 $coords] } {
  puts "ERROR: incorrect highlighting of edge 10"
}

vselnext
if { ![check_highlighting 2 $coords] } {
  puts "ERROR: incorrect highlighting of edge 1 after vselnext call"
}
vselnext
if { ![check_highlighting 1 $coords] } {
  puts "ERROR: incorrect highlighting of edge 2 after vselnext call"
}
vselnext
if { ![check_highlighting 0 $coords] } {
  puts "ERROR: incorrect highlighting of edge 10 after vselnext call"
}

vselprev
if { ![check_highlighting 1 $coords] } {
  puts "ERROR: incorrect highlighting of edge 2 after vselprev call"
}
vselprev
if { ![check_highlighting 2 $coords] } {
  puts "ERROR: incorrect highlighting of edge 1 after vselprev call"
}
vselprev
if { ![check_highlighting 0 $coords] } {
  puts "ERROR: incorrect highlighting of edge 10 after vselprev call"
}