add reentrant install/uninstall test

tests/shellcompletion/__init__.py

@@ -362,6 +362,18 @@ def test_pythonpath_pass_through(self):
         )
         self.assertIn("working", completions)
 
+    def test_reentrant_install_uninstall(self):
+        self.install()
+        self.install()
+        self.verify_install()
+
+        completions = self.get_completions(self.launch_script, "complet")
+        self.assertIn("completion", completions)
+
+        self.remove()
+        self.remove()
+        self.verify_remove()
+
 
 class _ScriptCompleteTestCase(_CompleteTestCase):
     manage_script: str = "manage.py"

tests/shellcompletion/test_fish.py

@@ -59,6 +59,9 @@ def test_pythonpath_pass_through(self): ...
     @pytest.mark.skip(reason="fish does not support script installations")
     def test_fallback(self): ...
 
+    @pytest.mark.skip(reason="fish does not support script installations")
+    def test_reentrant_install_uninstall(self): ...
+
 
 @pytest.mark.skipif(shutil.which("fish") is None, reason="Fish not available")
 class FishExeShellTests(_FishMixin, _InstalledScriptCompleteTestCase, TestCase):

tests/shellcompletion/test_powershell.py

@@ -81,6 +81,9 @@ def test_pythonpath_pass_through(self): ...
     @pytest.mark.skip(reason="powershell does not support script installations")
     def test_fallback(self): ...
 
+    @pytest.mark.skip(reason="powershell does not support script installations")
+    def test_reentrant_install_uninstall(self): ...
+
 
 @pytest.mark.skipif(
     shutil.which("powershell") is None, reason="Powershell not available"