test the invite room check and the no-homeserver sweep, drop the last space wording

hive-c0re/src/matrix.rs

@@ -460,4 +460,27 @@ mod tests {
             assert!(!message.contains("free-form-marker"), "{message}");
         }
     }
+
+    /// A room that is neither an id nor an alias is refused before any
+    /// request is made; with no default Space left, there is nothing to fall
+    /// back to.
+    #[tokio::test]
+    async fn invite_user_refuses_a_room_that_is_neither_an_id_nor_an_alias() {
+        let client = swarm_matrix_client::client().expect("client");
+        let err = invite_user(&client, "tok", "mara", "general", "example.org")
+            .await
+            .expect_err("a bare name is not a room");
+        assert!(
+            format!("{err:#}").contains("neither a room id nor an alias"),
+            "{err:#}"
+        );
+    }
+
+    /// The sweep touches nothing, and reports success, on a hive with no
+    /// homeserver configured (the test environment has none).
+    #[tokio::test]
+    async fn the_sweep_is_a_successful_no_op_without_a_homeserver() {
+        assert!(!is_present());
+        assert!(ensure_all().await);
+    }
 }

nix/host-modules/hive-c0re/environment.nix

@@ -170,7 +170,7 @@ in
 }
 // lib.optionalAttrs (config.services.hyperhive.swarm.matrix.apiUrl != null) {
   # Client-server API base hive-c0re uses to provision matrix (register
-  # agent users, create the hive space, invite members).
+  # agent users, invite members).
   # Supplied by `services.hyperhive.swarm.matrix.apiUrl`, which defaults to
   # the same gateway vhost as HIVE_MATRIX_URL above, over https because it
   # carries the hive's matrix token and may cross the network. Its own

nix/host-modules/hive-matrix-service.nix

@@ -59,8 +59,7 @@ in
       example = "https://matrix.example.com";
       description = ''
         Client-server API base URL **hive-c0re itself** uses to
-        provision matrix (register agent users, create the hive space,
+        provision matrix (register agent users, invite members). Distinct from the agent-facing
-        invite members). Distinct from the agent-facing
         `services.hyperhive.agent.matrix.url`, which is the gateway vhost handed to
         each agent's `hive-matrix-daemon`.