Fix test coverage of adapter

fio_wrapper/config.py

@@ -293,7 +293,7 @@ def cache_url_expirations(self) -> Dict[str, any]:
                 for url, expiration in self.data["cache"]["urls"].items():
                     # decide on potential values coming as int or str:
                     #   int = take as seconds
-                    if type(expiration) == int:
+                    if isinstance(expiration, int):
                         expiration_list[url] = expiration
                     #   NEVER_EXPIRE
                     elif expiration == "NEVER_EXPIRE":

tests/config_cache.yml

@@ -0,0 +1,7 @@
+cache:
+  enabled: true
+  default_expire: 10 # 10 seconds
+  urls:
+    "*/material/*": 3600
+    "*/exchange/all": NEVER_EXPIRE
+    "*/exchange/full": DO_NOT_CACHE

tests/test_fio_adapter.py

@@ -1,4 +1,6 @@
 import pytest
+import importlib.util
+from requests_cache import CachedSession
 from fio_wrapper import FIO, EndpointNotImplemented
 from fio_wrapper.exceptions import UnknownFIOResponse
 
@@ -13,6 +15,14 @@ def test_fio_adapter_version_notimplemented() -> None:
         FIO(version="0.0.0")
 
 
+def test_fio_adapter_requests_cache() -> None:
+    adapter = FIO(config="tests/config_cache.yml")
+
+    assert adapter.config.cache == True
+    assert importlib.util.find_spec("requests_cache") is not None
+    assert type(adapter.adapter._session) == CachedSession
+
+
 def test_fio_adapter_blankinit() -> None:
     adapter = FIO()