Add missing methods to ProxyBackend

Fixed regression where :class:`.ProxyBackend` was missing several methods
that were added as part of the 1.1 release.

Fixes: #202
Change-Id: I7dc419ab11b47b5d39b60792e9660bfc8cbc50c6

Author: zzzeek

docs/build/unreleased/202.rst

@@ -0,0 +1,6 @@
+.. change::
+    :tags: bug, regression
+    :tickets: 202
+
+    Fixed regression where :class:`.ProxyBackend` was missing several methods
+    that were added as part of the 1.1 release.

dogpile/cache/proxy.py

@@ -19,6 +19,7 @@
 from .api import CacheBackend
 from .api import CacheMutex
 from .api import KeyType
+from .api import SerializedReturnType
 
 
 class ProxyBackend(CacheBackend):
@@ -101,3 +102,17 @@ def delete_multi(self, keys: Sequence[KeyType]) -> None:
 
     def get_mutex(self, key: KeyType) -> Optional[CacheMutex]:
         return self.proxied.get_mutex(key)
+
+    def get_serialized(self, key: KeyType) -> SerializedReturnType:
+        return self.proxied.get_serialized(key)
+
+    def get_serialized_multi(
+        self, keys: Sequence[KeyType]
+    ) -> Sequence[SerializedReturnType]:
+        return self.proxied.get_serialized_multi(keys)
+
+    def set_serialized(self, key: KeyType, value: bytes) -> None:
+        self.proxied.set_serialized(key, value)
+
+    def set_serialized_multi(self, mapping: Mapping[KeyType, bytes]) -> None:
+        self.proxied.set_serialized_multi(mapping)

tests/cache/test_dbm_backend.py

@@ -2,6 +2,7 @@
 import sys
 
 from dogpile.cache.backends.file import AbstractFileLock
+from dogpile.cache.proxy import ProxyBackend
 from dogpile.util.readwrite_lock import ReadWriteMutex
 from . import assert_raises_message
 from ._fixtures import _GenericBackendTest
@@ -53,6 +54,15 @@ class DBMBackendConditionTest(_GenericBackendTest):
     }
 
 
+class DBMBackendProxyTest(_GenericBackendTest):
+    backend = "dogpile.cache.dbm"
+
+    config_args = {
+        "arguments": {"filename": test_fname, "lock_factory": MutexLock},
+        "wrap": [ProxyBackend],
+    }
+
+
 class DBMBackendSerializerTest(
     _GenericSerializerTest, DBMBackendConditionTest
 ):