#!/bin/bash

cd -- "$(dirname "$0")"
if test -z "$PRINTENV"; then
	PRINTENV=../printenv
fi
p="$PREFIX $PRINTENV"

report ()
{
	if test $1 = 0; then
		printf "\033[1;32mTest %s OK\033[m\n" "$2"
	else
		printf "\033[1;31mTest %s FAILED\033[m\n" "$2"
	fi
}

report_np ()
{
	if test $1 = 0; then
		printf "\033[1;32mTest %s OK (NON-STANDARD)\033[m\n" "$2"
	else
		printf "\033[1;31mTest %s FAILED (NON-STANDARD)\033[m\n" "$2"
	fi
}


all ()
{
	diff <(env -u _ $p) <(env -u _ env) > /dev/null
	report $? "all"
}

one ()
{
	test "$(env ABC=xyz $p ABC)" = xyz
	report $? "one"
}

two ()
{
	test "$(env ABC=xyz 123=abc $p ABC 123)" = $'xyz\nabc'
	report $? "two"
}

purged ()
{
	test -z "$(env -i $p)"
	report $? "purged"
}

nonexistent ()
{
	env -i $p ABC > tmp
	test $? = 1 && ! test -s tmp
	report $? "nonexistent"
	rm tmp
}

failure ()
{
	$p >&- 2>/dev/null
	test $? -ge 2
	report_np $? "failure"
}

ddash ()
{
	test "$(env ABC=xyz $p -- ABC)" = xyz
	report $? "ddash"
}

# Do not test e.g. `env A=B=C $p A=B`, failure of such test
# would most likely indicate that getenv(3) does not verify that
# the variable name does not contain a '='. Calling printenv with
# a '=' would also be user error.


if test $# = 0; then
	set all one two purged nonexistent failure ddash
fi
(
for f in $@; do
	$f
done
) | tee result
! grep FAILED < result > /dev/null
ret=$?
if test $ret != 0; then
	if test $(grep FAILED < result | grep -v NON-STANDARD | wc -l) = 0; then
		ret=1
	else
		ret=2
	fi
fi
rm result
exit $ret