#209: Fix LRU cache test

test/icat/test_lru_cache.py

@@ -1,6 +1,7 @@
 from unittest.mock import MagicMock
 
 from cachetools import cached
+from icat.client import Client
 
 from datagateway_api.common.config import config
 from datagateway_api.common.icat.icat_client_pool import create_client_pool
@@ -12,15 +13,18 @@ def test_valid_cache_creation(self):
         test_cache = ExtendedLRUCache()
         assert test_cache.maxsize == config.get_client_cache_size()
 
-    def test_valid_popitem(self, icat_client):
+    def test_valid_popitem(self):
         test_cache = ExtendedLRUCache()
         test_pool = create_client_pool()
+        test_client = Client(
+            config.get_icat_url(), checkCert=config.get_icat_check_cert(),
+        )
 
         test_cache.popitem = MagicMock(side_effect=test_cache.popitem)
 
         @cached(cache=test_cache)
         def get_cached_client(cache_number, client_pool):
-            return icat_client
+            return test_client
 
         for cache_number in range(config.get_client_cache_size() + 1):
             get_cached_client(cache_number, test_pool)