Add snapper-zypp-plugin test

https://progress.opensuse.org/issues/168079

lib/main_common.pm

@@ -1640,6 +1640,7 @@ sub load_extra_tests_zypper {
     replace_opensuse_repos_tests if is_repo_replacement_required;
     loadtest "console/zypper_lr_validate" unless is_sle '15+';
     loadtest "console/zypper_ref";
+    loadtest "console/snapper_zypp";
     unless (is_jeos) {
         loadtest "console/zypper_info";
     }

schedule/functional/extra_tests_textmode.yaml

@@ -111,6 +111,7 @@ schedule:
     - console/zypper_lr_validate
     - console/zypper_ref
     - console/zypper_info
+    - console/snapper_zypp
     - '{{validate_packages_and_patterns}}'
     - console/zypper_extend
     - console/check_os_release

tests/console/snapper_zypp.pm

@@ -0,0 +1,42 @@
+# SUSE's openQA tests
+#
+# Copyright SUSE LLC
+# SPDX-License-Identifier: FSFAP
+# Summary: Simple 'snapper-zypp-plugin' test
+#       1. Ensure 'snapper-zypp-plugin' is installed
+#       2. Get latest snapshot id number
+#       3. Install/remove package
+#       4. Ensure id number incremented by 2 (pre/post snapshots were created)
+# Maintainer: QE Core <qe-core@suse.de>
+
+use base "consoletest";
+use strict;
+use warnings;
+use testapi;
+use serial_terminal 'select_serial_terminal';
+use utils;
+use Test::Assert 'assert_equals';
+
+sub get_snapshot_id {
+    return script_output("snapper ls | awk 'END {print \$1}'");
+}
+
+sub run_zypper_cmd {
+    my $zypper_cmd = shift;
+    my $before_snapshot_id = get_snapshot_id();
+    zypper_call($zypper_cmd);
+    my $after_snapshot_id = get_snapshot_id();
+    record_info("Snapshot IDs", "Before: $before_snapshot_id, After: $after_snapshot_id");
+    assert_equals($after_snapshot_id, $before_snapshot_id + 2, "Snapshot ID did not increment as expected");
+}
+
+sub run {
+    select_serial_terminal;
+    my $package = "htop";
+
+    assert_script_run("rpm -q snapper-zypp-plugin");
+    run_zypper_cmd("in $package");
+    run_zypper_cmd("rm $package");
+}
+
+1;