cmd/builtin/head.rt

# regression tests for the head utility

UNIT head

TEST 'default options'

EXEC < /dev/null

DATA - -n $'a'
EXEC

EXEC <<!

!

EXEC <<<$'a\n'
EXEC <<<$'1\n2\n3\n4\n5\n6\n7\n8'
EXEC <<<$'1\n2\n3\n4\n5\n6\n7\n8\n9'
EXEC <<<$'1\n2\n3\n4\n5\n6\n7\n8\n9\n0'
EXEC <<<$'1\n2\n3\n4\n5\n6\n7\n8\n9\n0\na'
EXEC <<<$'1\n2\n3\n4\n5\n6\n7\n8\n9\n0\na\nb'

TEST '-<number><qualifier>'

EXEC -1 <<<$'1\n2'
EXEC -1c < /dev/null

DATA - -n $'12'
EXEC -1c

DATA - -n $'1234567890abcdefg'
EXEC -14c

TEST '-n'

EXEC -n 4096m <<<$'a'
EXEC -n 2048m

DATA - -f$'z%Zz\n'
EXEC

TEST '-n<octal> and -<octal>'

EXEC -08 <<<$'\n\n\n\n\n\n\n\n\n\n\n'
EXEC -n 08
EXEC -c 08
EXEC -010
EXEC -n 010
EXEC -c 010