From 2fc0b4425197099ba5575d3b50ac77b51c0e0a95 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Thu, 28 Mar 2024 11:38:33 -0400
Subject: tests/gnu: Add a -used test

---
 tests/gnu/used.out |  4 ++++
 tests/gnu/used.sh  | 40 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)
 create mode 100644 tests/gnu/used.out
 create mode 100644 tests/gnu/used.sh

diff --git a/tests/gnu/used.out b/tests/gnu/used.out
new file mode 100644
index 0000000..647621b
--- /dev/null
+++ b/tests/gnu/used.out
@@ -0,0 +1,4 @@
+-used +7: ./nextyear
+-used 1: ./tomorrow
+-used 2: ./dayafter
+-used 7: ./nextweek
diff --git a/tests/gnu/used.sh b/tests/gnu/used.sh
new file mode 100644
index 0000000..5e5d4e9
--- /dev/null
+++ b/tests/gnu/used.sh
@@ -0,0 +1,40 @@
+iso8601() {
+    printf '%04d-%02d-%02dT%02d:%02d:%02d\n' "$@"
+}
+
+cd "$TEST"
+
+now=$(date '+%Y-%m-%dT%H:%M:%S')
+
+# Parse the current date
+[[ "$now" =~ ^([0-9]{4})-([0-9]{2})-([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})$ ]] || fail
+# Treat leading zeros as decimal, not octal
+YYYY=$((10#${BASH_REMATCH[1]}))
+MM=$((10#${BASH_REMATCH[2]}))
+DD=$((10#${BASH_REMATCH[3]}))
+hh=$((10#${BASH_REMATCH[4]}))
+mm=$((10#${BASH_REMATCH[5]}))
+ss=$((10#${BASH_REMATCH[6]}))
+
+# -used is always false if atime < ctime
+yesterday=$(iso8601 $YYYY $MM $((DD - 1)) $hh $mm $ss)
+"$XTOUCH" -at "$yesterday" yesterday
+
+# -used rounds up
+tomorrow=$(iso8601 $YYYY $MM $DD $((hh + 1)) $mm $ss)
+"$XTOUCH" -at "$tomorrow" tomorrow
+
+dayafter=$(iso8601 $YYYY $MM $((DD + 1)) $((hh + 1)) $mm $ss)
+"$XTOUCH" -at "$dayafter" dayafter
+
+nextweek=$(iso8601 $YYYY $MM $((DD + 6)) $((hh + 1)) $mm $ss)
+"$XTOUCH" -at "$nextweek" nextweek
+
+nextyear=$(iso8601 $((YYYY + 1)) $MM $DD $hh $mm $ss)
+"$XTOUCH" -at "$nextyear" nextyear
+
+bfs_diff -mindepth 1 \
+    -a -used 1 -printf '-used 1: %p\n' \
+    -o -used 2 -printf '-used 2: %p\n' \
+    -o -used 7 -printf '-used 7: %p\n' \
+    -o -used +7 -printf '-used +7: %p\n'
-- 
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