# regression tests for the tsort utilitiy

KEEP "*.dat"

TEST 01 'basics'

EXEC

INPUT - $'a a'

OUTPUT - $'a'

EXEC

INPUT - $'a a b b'

OUTPUT - $'a\nb'

EXEC

INPUT - $'a c\na b\nb c'

OUTPUT - $'a\nb\nc'

EXEC

INPUT - $'a b\nb c\nc a'

OUTPUT - $'a\nb\nc'

ERROR - $'tsort: warning: cycle in data\ntsort: a\ntsort: b\ntsort: c'

EXIT 1

EXEC

INPUT - $'a'

OUTPUT -

ERROR - $'tsort: odd data'

TEST 02 'how did this slip through?'

EXEC

INPUT - $'b c\na c\na b'

OUTPUT - $'a\nb\nc'