feat: initialize Nocal terminal calendar

tests/cli_recovery_test.sh

@@ -0,0 +1,83 @@
+#!/bin/sh
+set -eu
+
+if [ "$#" -ne 1 ]; then
+    echo "usage: cli_recovery_test.sh /path/to/nocal" >&2
+    exit 2
+fi
+
+nocal=$1
+tmpdir=$(mktemp -d "${TMPDIR:-/tmp}/nocal-cli-recovery.XXXXXX")
+trap 'rm -rf "$tmpdir"' EXIT HUP INT TERM
+
+calendar=$tmpdir/calendar.ics
+backup=$calendar.bak
+expected=$tmpdir/expected.ics
+
+cat >"$calendar" <<'EOF'
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//Nocal CLI test//EN
+BEGIN:VEVENT
+UID:current@nocal.test
+DTSTART:20260717T090000
+DTEND:20260717T100000
+SUMMARY:Current appointment
+END:VEVENT
+END:VCALENDAR
+EOF
+
+cat >"$backup" <<'EOF'
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//Nocal CLI test//EN
+BEGIN:VEVENT
+UID:backup@nocal.test
+DTSTART:20260718T140000
+DTEND:20260718T150000
+SUMMARY:Recovered appointment
+END:VEVENT
+END:VCALENDAR
+EOF
+cp "$backup" "$expected"
+
+help=$("$nocal" --help)
+case $help in
+    *--restore-backup*"u undoes the last change, Ctrl-R redoes it"*) ;;
+    *)
+        echo "help does not document recovery and undo/redo" >&2
+        exit 1
+        ;;
+esac
+
+if "$nocal" --restore-backup --demo --calendar "$calendar" >"$tmpdir/out" 2>"$tmpdir/err"; then
+    echo "--restore-backup with --demo unexpectedly succeeded" >&2
+    exit 1
+fi
+grep -F -- "--restore-backup cannot be combined with --demo" "$tmpdir/err" >/dev/null
+
+if "$nocal" --restore-backup --print --calendar "$calendar" >"$tmpdir/out" 2>"$tmpdir/err"; then
+    echo "--restore-backup with --print unexpectedly succeeded" >&2
+    exit 1
+fi
+grep -F -- "--restore-backup cannot be combined with --print" "$tmpdir/err" >/dev/null
+
+missing_calendar=$tmpdir/missing-backup.ics
+cp "$calendar" "$missing_calendar"
+cp "$missing_calendar" "$tmpdir/missing-before.ics"
+if "$nocal" --restore-backup --calendar "$missing_calendar" \
+        >"$tmpdir/out" 2>"$tmpdir/err"; then
+    echo "restore without an adjacent backup unexpectedly succeeded" >&2
+    exit 1
+fi
+cmp "$missing_calendar" "$tmpdir/missing-before.ics"
+
+actual=$("$nocal" --restore-backup --calendar "$calendar")
+expected_summary="Restored backup $backup to $calendar"
+if [ "$actual" != "$expected_summary" ]; then
+    echo "unexpected restore summary: $actual" >&2
+    exit 1
+fi
+
+cmp "$calendar" "$expected"
+cmp "$backup" "$expected"