public async void GetSpecificationsAsyncTest()
        {
            var expected = JObject.Parse(@"
      {
        collection: 'bar',
        index: 'foo',
        validation: {
          fields: { fields: 'data' },
          strict: true
        }
      }");

            _api.SetResult(new JObject {
                { "result", expected }
            });

            JObject mappings =
                await _collectionController.GetSpecificationsAsync("foo", "bar");

            _api.Verify(new JObject {
                { "controller", "collection" },
                { "action", "getSpecifications" },
                { "index", "foo" },
                { "collection", "bar" }
            });

            Assert.Equal(
                expected["validation"],
                mappings,
                new JTokenEqualityComparer());
        }