Fix tests

Author: ejsmith

src/Foundatio.Redis/Cache/RedisCacheClient.cs

@@ -311,11 +311,14 @@ public async Task<long> ListAddAsync<T>(string key, IEnumerable<T> values, TimeS
             throw new ArgumentNullException(nameof(key), "Key cannot be null or empty");
 
         if (values == null)
-            return 0;
+            throw new ArgumentNullException(nameof(values));
 
         var expiresAt = expiresIn.HasValue ? _timeProvider.GetUtcNow().UtcDateTime.SafeAdd(expiresIn.Value) : DateTime.MaxValue;
         if (expiresAt < _timeProvider.GetUtcNow().UtcDateTime)
-            return await ListRemoveAsync(key, values).AnyContext();
+        {
+            await ListRemoveAsync(key, values).AnyContext();
+            return 0;
+        }
 
         var redisValues = new List<SortedSetEntry>();
         long expiresAtMilliseconds = expiresAt.ToUnixTimeMilliseconds();
@@ -343,7 +346,7 @@ public async Task<long> ListRemoveAsync<T>(string key, IEnumerable<T> values, Ti
             throw new ArgumentNullException(nameof(key), "Key cannot be null or empty");
 
         if (values == null)
-            return 0;
+            throw new ArgumentNullException(nameof(values));
 
         var redisValues = new List<RedisValue>();
         if (values is string stringValue)