tests: Add initial unit tests for browsertab.py

tests/unit/browser/test_browsertab.py

@@ -0,0 +1,49 @@
+# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:
+
+# Copyright 2022 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
+#
+# This file is part of qutebrowser.
+#
+# qutebrowser 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 3 of the License, or
+# (at your option) any later version.
+#
+# qutebrowser 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 qutebrowser.  If not, see <https://www.gnu.org/licenses/>.
+
+import pytest
+
+from qutebrowser.qt.core import QUrl
+from qutebrowser.browser import browsertab
+
+
+class TestAction:
+
+    def test_run_string_valid(self, qtbot, web_tab):
+        url_1 = QUrl("qute://testdata/data/backforward/1.txt")
+        url_2 = QUrl("qute://testdata/data/backforward/2.txt")
+
+        with qtbot.wait_signal(web_tab.load_finished):
+            web_tab.load_url(url_1)
+        with qtbot.wait_signal(web_tab.load_finished):
+            web_tab.load_url(url_2)
+
+        assert web_tab.url() == url_2
+        with qtbot.wait_signal(web_tab.load_finished):
+            web_tab.action.run_string("Back")
+        assert web_tab.url() == url_1
+
+
+    @pytest.mark.parametrize("member", ["blah", "PermissionUnknown"])
+    def test_run_string_invalid(self, qtbot, web_tab, member):
+        with pytest.raises(
+            browsertab.WebTabError,
+            match=f"{member} is not a valid web action!",
+        ):
+            web_tab.action.run_string(member)