fix unit tests

src/charm.py

@@ -220,9 +220,6 @@ def _external_url(self) -> str:
 
         If not set in the config, return the internal url.
         """
-        # Note: this property is here for convenience, and for semantic reasons.
-        # When the charm will have a traefik relation, the `_external_url` should
-        # return `self.ingress.url or self._internal_url`.
         return self.ingress.url or self._internal_url
 
     @property

tests/unit/test_charm.py

@@ -21,6 +21,7 @@ class TestWithInitialHooks(unittest.TestCase):
 
     @patch.object(BlackboxExporterApi, "reload", tautology)
     @patch("socket.getfqdn", new=lambda *args: "fqdn")
+    @patch("charm.BlackboxExporterCharm._external_url", new="http://0.0.0.0/")
     @k8s_resource_multipatch
     @patch("lightkube.core.client.GenericSyncClient")
     @patch.object(WorkloadManager, "_blackbox_exporter_version", property(lambda *_: "0.0.0"))
@@ -71,6 +72,7 @@ class TestWithoutInitialHooks(unittest.TestCase):
     @patch.object(BlackboxExporterApi, "reload", tautology)
     @k8s_resource_multipatch
     @patch("lightkube.core.client.GenericSyncClient")
+    @patch("charm.BlackboxExporterCharm._external_url", new="http://0.0.0.0/")
     def setUp(self, *unused):
         self.harness = Harness(BlackboxExporterCharm)
         self.addCleanup(self.harness.cleanup)