1 files changed, 133 insertions, 0 deletions
diff --git a/tests/ranking.sh b/tests/ranking.sh
new file mode 100755
index 0000000..7b69106
--- /dev/null
+++ b/tests/ranking.sh
@@ -0,0 +1,133 @@
+#!/bin/sh
+set -eu
+
+. tests/lib.sh
+
+test_picking_first_makes_it_be_always_first() {
+	OUT="$(mktemp)"
+	ERR="$(mktemp)"
+	PROFILE="always-picks-first-$(uuidgen)"
+	for _ in $(seq 10); do
+		printf 'always-picked\nnever-picked\n' | \
+			sh remembering \
+				-p "$PROFILE" \
+				-c 'head -n1' \
+				1>"$OUT" 2>"$ERR"
+		STATUS=$?
+		assert_status 0
+		assert_empty_stderr
+		assert_stdout 'always-picked'
+	done
+}
+
+INPUT='a'
+for letter in {b..z}; do
+	INPUT="$INPUT
+$letter"
+done
+
+pick_x() {
+	OUT="$(mktemp)"
+	ERR="$(mktemp)"
+	PICK="$1"
+
+	echo "$INPUT" | \
+		sh remembering \
+			-p "$PROFILE" \
+			-c "tee -a /dev/stderr | grep $PICK" \
+			1>"$OUT" 2>"$ERR"
+	STATUS=$?
+	assert_status 0
+	assert_stdout "$PICK"
+}
+
+assert_first() {
+	FIRST="$(head -n1 "$ERR")"
+	if [ "$FIRST" != "$1" ]; then
+		echo 'Previous choice did not appear at the beginning of the list'
+		printf '\nexpected: %s\ngot: %s\n' "$1" "$FIRST"
+		exit 1
+	fi
+}
+
+test_promoting_values() {
+	PROFILE="promoting-$(uuidgen)"
+
+	pick_x h
+	pick_x z # just to get the new STDIN
+	assert_first h
+
+	pick_x h
+	pick_x z
+	assert_first h
+}
+
+test_higher_values_loose_tie() {
+	PROFILE="higher-loose-tie-$(uuidgen)"
+
+	pick_x f
+	pick_x f
+	pick_x g
+	pick_x g
+	pick_x z
+	assert_first f
+}
+
+test_smaller_values_win_tie() {
+	PROFILE="smaller-win-tie-$(uuidgen)"
+
+	pick_x d
+	pick_x d
+	pick_x c
+	pick_x c
+	pick_x z
+	assert_first c
+}
+
+test_many_sequential_picks() {
+	PROFILE="many-sequential-picks-$(uuidgen)"
+
+	pick_x b
+	pick_x r
+	pick_x l
+	pick_x r
+	pick_x s
+	pick_x a
+	pick_x d
+	pick_x m
+	pick_x g
+	pick_x g
+	pick_x l
+	pick_x l
+	pick_x f
+	pick_x f
+	pick_x f
+	pick_x l
+	pick_x a
+
+	pick_x z
+	assert_first l
+
+	EXPECTED='l
+f
+a
+g
+r
+b
+d
+m
+s'
+	ACTUAL="$(head -n9 "$ERR")"
+	if [ "$ACTUAL" != "$EXPECTED" ]; then
+		printf 'Bad order!\n\nexpected: %s\ngot:      %s\n' \
+			"$(echo "$EXPECTED" | tr '\n' ' ')" \
+			"$(echo "$ACTUAL"   | tr '\n' ' ')"
+		exit 1
+	fi
+}
+
+test_picking_first_makes_it_be_always_first
+test_promoting_values
+test_higher_values_loose_tie
+test_smaller_values_win_tie
+test_many_sequential_picks