On plugin import error unset sys.modules again

test/data/testplugins/importerror/dummyplugin.py

@@ -0,0 +1,32 @@
+# -*- coding: utf-8 -*-
+#
+# Picard, the next-generation MusicBrainz tagger
+#
+# Copyright (C) 2019-2021 Laurent Monin
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+
+"""Dummy plugin for tests"""
+PLUGIN_NAME = "Dummy plugin"
+PLUGIN_AUTHOR = "Zas"
+PLUGIN_DESCRIPTION = "Dummy plugin description"
+PLUGIN_VERSION = "1.0"
+PLUGIN_API_VERSIONS = ["2.0"]
+PLUGIN_LICENSE = 'Dummy plugin license'
+PLUGIN_LICENSE_URL = 'dummy.plugin.url'
+
+
+raise ImportError