feat: fix tests and add FastAPICache init in tests.

fastapi_cache/__init__.py

@@ -34,6 +34,16 @@ class FastAPICache:
         cls._key_builder = key_builder
         cls._enable = enable
 
+    @classmethod
+    def reset(cls) -> None:
+        cls._init = False
+        cls._backend = None
+        cls._prefix = None
+        cls._expire = None
+        cls._coder = None
+        cls._key_builder = None
+        cls._enable = True
+
     @classmethod
     def get_backend(cls) -> Backend:
         assert cls._backend, "You must call init first!"  # nosec: B101
@@ -41,7 +51,7 @@ class FastAPICache:
 
     @classmethod
     def get_prefix(cls) -> str:
-        assert cls._prefix, "You must call init first!"  # nosec: B101
+        assert cls._prefix is not None, "You must call init first!"  # nosec: B101
         return cls._prefix
 
     @classmethod
@@ -64,6 +74,6 @@ class FastAPICache:
 
     @classmethod
     async def clear(cls, namespace: Optional[str] = None, key: Optional[str] = None) -> int:
-        assert cls._backend and cls._prefix, "You must call init first!"  # nosec: B101
+        assert cls._backend and cls._prefix is not None, "You must call init first!"  # nosec: B101
         namespace = cls._prefix + (":" + namespace if namespace else "")
         return await cls._backend.clear(namespace, key)

tests/test_decorator.py

@@ -1,13 +1,24 @@
 import time
+from typing import Generator
 
 import pendulum
+import pytest
+
 from fastapi_cache import FastAPICache
 from starlette.testclient import TestClient
 
 from examples.in_memory.main import app
+from fastapi_cache.backends.inmemory import InMemoryBackend
 
 
-def test_datetime():
+@pytest.fixture(autouse=True)
+def init_cache() -> Generator:
+    FastAPICache.init(InMemoryBackend())
+    yield
+    FastAPICache.reset()
+
+
+def test_datetime() -> None:
     with TestClient(app) as client:
         response = client.get("/datetime")
         now = response.json().get("now")
@@ -23,7 +34,8 @@ def test_datetime():
         assert now != now_
         assert now == pendulum.now().replace(microsecond=0)
 
-def test_date():
+
+def test_date() -> None:
     """Test path function without request or response arguments."""
     with TestClient(app) as client:
 
@@ -40,7 +52,8 @@ def test_date():
         assert pendulum.parse(response.json()) == pendulum.today()
         FastAPICache._enable = True
 
-def test_sync():
+
+def test_sync() -> None:
     """Ensure that sync function support works."""
     with TestClient(app) as client:
         response = client.get("/sync-me")