ResourceTypes test incorrect?

It appears that the ResourceTypes test is trying to valid the response as if it contained just one ResourceType object, whereas it should be looking for a ListResponse object containing multiple definitions. In addition, the schemaExtensions object is only parsed if it's a singular object, whereas the spec indicates it should be an array.

Here's the example json from the spec, but it fails the test. (I assume it should pass.)

https://tools.ietf.org/html/rfc7644#page-75