Test if cache is None before falling back to DictCache

This allows passing in a cache instance that is falsy

Author: Jaap Roes

cachecontrol/adapter.py

@@ -24,7 +24,7 @@ def __init__(
         **kw
     ):
         super(CacheControlAdapter, self).__init__(*args, **kw)
-        self.cache = cache or DictCache()
+        self.cache = DictCache() if cache is None else cache
         self.heuristic = heuristic
         self.cacheable_methods = cacheable_methods or ("GET",)
 

cachecontrol/controller.py

@@ -34,7 +34,7 @@ class CacheController(object):
     def __init__(
         self, cache=None, cache_etags=True, serializer=None, status_codes=None
     ):
-        self.cache = cache or DictCache()
+        self.cache = DictCache() if cache is None else cache
         self.cache_etags = cache_etags
         self.serializer = serializer or Serializer()
         self.cacheable_status_codes = status_codes or (200, 203, 300, 301)

cachecontrol/wrapper.py

@@ -13,7 +13,7 @@ def CacheControl(
     cacheable_methods=None,
 ):
 
-    cache = cache or DictCache()
+    cache = DictCache() if cache is None else cache
     adapter_class = adapter_class or CacheControlAdapter
     adapter = adapter_class(
         cache,