bin/xbps-rindex: add unit tests to test rindex behavior for adding packages with reverts.

tests/xbps/xbps-rindex/add_test.sh

@@ -30,6 +30,33 @@ update_body() {
 	atf_check_equal $rv 0
 }
 
+revert_head() {
+	atf_set "descr" "xbps-rindex(8) -a: revert version test"
+}
+
+revert_body() {
+	mkdir -p some_repo pkg_A
+	touch pkg_A/file00
+	cd some_repo
+	xbps-create -A noarch -n foo-1.1_1 -s "foo pkg" ../pkg_A
+	atf_check_equal $? 0
+	xbps-rindex -a *.xbps
+	atf_check_equal $? 0
+	xbps-create -A noarch -n foo-1.0_1 -r "1.1_1" -s "foo pkg" ../pkg_A
+	atf_check_equal $? 0
+	xbps-rindex -a *.xbps
+	atf_check_equal $? 0
+	cd ..
+	result="$(xbps-query -r root -C empty.conf --repository=some_repo -o \*)"
+	expected="foo-1.0_1: /file00 (some_repo)"
+	rv=0
+	if [ "$result" != "$expected" ]; then
+		rv=1
+	fi
+	atf_check_equal $rv 0
+}
+
 atf_init_test_cases() {
 	atf_add_test_case update
+	atf_add_test_case revert
 }