Add get_stats to MemoryBackend and update pytest config

Added get_stats() method for consistency with RedisBackend. Also added
httpx and pytest-asyncio as dev dependencies.

fastapi_traffic/backends/memory.py

@@ -134,6 +134,19 @@ class MemoryBackend(Backend):
             self._cleanup_task = None
         await self.clear()
 
+    async def ping(self) -> bool:
+        """Check if the backend is available. Always returns True for memory backend."""
+        return True
+
+    async def get_stats(self) -> dict[str, Any]:
+        """Get statistics about the rate limit storage."""
+        async with self._lock:
+            return {
+                "total_keys": len(self._data),
+                "max_size": self._max_size,
+                "backend": "memory",
+            }
+
     def __len__(self) -> int:
         """Return the number of stored entries."""
         return len(self._data)

pyproject.toml

@@ -94,12 +94,15 @@ reportMissingImports = false
 
 [tool.pytest.ini_options]
 asyncio_mode = "auto"
+asyncio_default_fixture_loop_scope = "function"
 testpaths = ["tests"]
 addopts = "-v --tb=short"
 
 [dependency-groups]
 dev = [
     "fastapi>=0.128.0",
+    "httpx>=0.28.1",
     "pytest>=9.0.2",
+    "pytest-asyncio>=1.3.0",
     "uvicorn>=0.40.0",
 ]

uv.lock

@@ -247,7 +247,9 @@ redis = [
 [package.dev-dependencies]
 dev = [
     { name = "fastapi" },
+    { name = "httpx" },
     { name = "pytest" },
+    { name = "pytest-asyncio" },
     { name = "uvicorn" },
 ]
 
@@ -273,7 +275,9 @@ provides-extras = ["redis", "fastapi", "all", "dev"]
 [package.metadata.requires-dev]
 dev = [
     { name = "fastapi", specifier = ">=0.128.0" },
+    { name = "httpx", specifier = ">=0.28.1" },
     { name = "pytest", specifier = ">=9.0.2" },
+    { name = "pytest-asyncio", specifier = ">=1.3.0" },
     { name = "uvicorn", specifier = ">=0.40.0" },
 ]