[#318] Add tombstone expiration test

Signed-off-by: a.berezin <a.berezin@yadro.com>

src/frostfs_testlib/storage/dataclasses/node_base.py

@@ -65,6 +65,10 @@ class NodeBase(HumanReadableABC):
         with reporter.step(f"Start {self.name} service on {self.host.config.address}"):
             self.host.start_service(self.name)
 
+    def send_signal_to_service(self, signal: str):
+        with reporter.step(f"Send -{signal} signal to {self.name} service on {self.host.config.address}"):
+            self.host.send_signal_to_service(self.name, signal)
+
     @abstractmethod
     def service_healthcheck(self) -> bool:
         """Service healthcheck."""
@@ -185,9 +189,7 @@ class NodeBase(HumanReadableABC):
 
         if attribute_name not in config.attributes:
             if default_attribute_name is None:
-                raise RuntimeError(
-                    f"Service {self.name} has no {attribute_name} in config and fallback attribute isn't set either"
-                )
+                raise RuntimeError(f"Service {self.name} has no {attribute_name} in config and fallback attribute isn't set either")
 
             return config.attributes[default_attribute_name]
 
@@ -197,9 +199,7 @@ class NodeBase(HumanReadableABC):
         return self.host.get_service_config(self.name)
 
     def get_service_uptime(self, service: str) -> datetime:
-        result = self.host.get_shell().exec(
-            f"systemctl show {service} --property ActiveEnterTimestamp | cut -d '=' -f 2"
-        )
+        result = self.host.get_shell().exec(f"systemctl show {service} --property ActiveEnterTimestamp | cut -d '=' -f 2")
         start_time = parser.parse(result.stdout.strip())
         current_time = datetime.now(tz=timezone.utc)
         active_time = current_time - start_time