fix: test_timed_cache.py::test_readding_after_expiry

libp2p/tools/timed_cache/first_seen_cache.py

@@ -9,12 +9,24 @@ class FirstSeenCache(BaseTimedCache):
     """Cache where expiry is set only when first added."""
 
     def add(self, key: bytes) -> bool:
+        now = int(time.time())
         with self.lock:
             if key in self.cache:
+                # Check if the key is expired
+                if self.cache[key] <= now:
+                    # Key is expired, update the expiry and treat as a new entry
+                    self.cache[key] = now + self.ttl
+                    return True
                 return False
-            self.cache[key] = int(time.time()) + self.ttl
+            self.cache[key] = now + self.ttl
             return True
 
     def has(self, key: bytes) -> bool:
+        now = int(time.time())
         with self.lock:
-            return key in self.cache
+            if key in self.cache:
+                # Check if key is expired
+                if self.cache[key] <= now:
+                    return False
+                return True
+            return False