dynamicdns: Skip uninstall test

Tests:

- test_uninstall is skipped for dynamicdns.

- test_uninstall is passed for bepasty.

Signed-off-by: James Valleroy <jvalleroy@mailbox.org>
Reviewed-by: Sunil Mohan Adapa <sunil@medhas.org>

plinth/modules/dynamicdns/tests/test_functional.py

@@ -75,6 +75,7 @@ class TestDynamicDNSApp(functional.BaseAppTests):
     app_name = 'dynamicdns'
     has_service = False
     has_web = False
+    can_uninstall = False
     check_diagnostics = False
 
     @staticmethod

plinth/tests/functional/__init__.py

@@ -641,6 +641,7 @@ class BaseAppTests:
     # TODO: Check the components of the app instead of configuring here.
     has_service = False
     has_web = True
+    can_uninstall = True
     check_diagnostics = True
     diagnostics_delay = 0
     disable_after_tests = True
@@ -706,6 +707,9 @@ class BaseAppTests:
 
     def test_uninstall(self, session_browser):
         """Test that app can be uninstalled and installed back again."""
+        if not self.can_uninstall:
+            pytest.skip(f'Skipping uninstall test for {self.app_name}.')
+
         uninstall(session_browser, self.app_name)
         assert not is_installed(session_browser, self.app_name)
         install(session_browser, self.app_name)