1 files changed, 123 insertions, 0 deletions
diff --git a/tests/lib.sh b/tests/lib.sh
new file mode 100755
index 0000000..76f22e3
--- /dev/null
+++ b/tests/lib.sh
@@ -0,0 +1,123 @@
+#!/bin/sh
+
+end="\033[0m"
+red="\033[0;31m"
+green="\033[0;32m"
+yellow="\033[0;33m"
+
+N=
+OUT=
+ERR=
+STATUS=
+
+ERROR() {
+	# shellcheck disable=2059
+	printf "${red}ERROR${end}"
+}
+
+print_debug_info() {
+	printf 'LINENO:   %s\nOUT:      %s\n%s:      %s\n' "$N" "$OUT" "$(ERROR)" "$ERR" >&2
+}
+
+assert_status() {
+	if [ "$STATUS" != "$1" ]; then
+		printf '\n%s: Bad status.\n\nexpected: %s\ngot:      %s\n' \
+			"$(ERROR)" "$1" "$STATUS" >&2
+		print_debug_info
+		exit 1
+	fi
+}
+
+assert_usage() {
+	if ! grep -Fq 'Usage' "$1"; then
+		echo 'Expected to find "Usage" text, it was missing:' >&2
+		cat "$1" >&2
+		print_debug_info
+		exit 1
+	fi
+}
+
+assert_empty_stream() {
+	if [ -s "$2" ]; then
+		printf '\n%s: Expected %s (%s) to be empty, but has content:\n%s\n' \
+			"$(ERROR)" "$1" "$2" "$(cat "$2")" >&2
+		print_debug_info
+		exit 1
+	fi
+}
+
+assert_empty_stdout() {
+	assert_empty_stream STDOUT "$OUT"
+}
+
+assert_empty_stderr() {
+	assert_empty_stream STDERR "$ERR"
+}
+
+assert_stream() {
+	if [ "$(cat "$2")" != "$3" ]; then
+		printf '\n%s: Bad %s (%s)\n\nexpected: %s\ngot:      %s\n' \
+			"$(ERROR)" "$1" "$2" "$3" "$(cat "$2")" >&2
+		print_debug_info
+		exit 1
+	fi
+}
+
+assert_stdout() {
+	assert_stream STDOUT "$OUT" "$1"
+}
+
+assert_stderr() {
+	assert_stream STDERR "$ERR" "$1"
+}
+
+assert_grep_stream() {
+	if ! grep -qE "$3" "$2"; then
+		printf '\n%s: Bad %s (%s)\n\ngrepping: %s\nin:\n%s\n' \
+			"$(ERROR)" "$1" "$2" "$3"  "$(cat "$2")" >&2
+		print_debug_info
+		exit 1
+	fi
+}
+
+assert_grep_stdout() {
+	assert_grep_stream STDOUT "$OUT" "$1"
+}
+
+assert_grep_stderr() {
+	assert_grep_stream STDERR "$ERR" "$1"
+}
+
+assert_fgrep_stream() {
+	if ! grep -Fq -- "$3" "$2"; then
+		printf '\n%s: Bad %s (%s)\n\ngrepping: %s\nin:\n%s\n' \
+			"$(ERROR)" "$1" "$2" "$3"  "$(cat "$2")" >&2
+		print_debug_info
+		exit 1
+	fi
+}
+
+assert_fgrep_stdout() {
+	assert_fgrep_stream STDOUT "$OUT" "$1"
+}
+
+assert_fgrep_stderr() {
+	assert_fgrep_stream STDERR "$ERR" "$1"
+}
+
+testing() {
+	printf "${yellow}testing${end}: %s..." "$1" >&2
+}
+
+test_ok() {
+	# shellcheck disable=2059
+	printf " ${green}OK${end}.\n" >&2
+}
+
+uuid() {
+	# Taken from:
+	# https://serverfault.com/a/799198
+	od -xN20 /dev/urandom | \
+		head -1 | \
+		awk '{OFS="-"; print $2$3,$4,$5,$6,$7$8$9}'
+}