public void Validate_Filter_Collection()
        {
            var collection = new NameValueCollection {
                { "oauth_consumer_key", "key" }, { "car", "black" }, { "oauth_timestamp", "timestamp" }, { "oauth_signature", "sig" }
            };
            var filteredCollection = new NameValueCollection {
                { "car", "black" }
            };

            collection.FilterCollection().CollectionEquals(filteredCollection).Should().BeTrue();
        }