Unit Testing: How to bypass RunPage Deserializer?

[SlyckLizzie]

Describe the need

I am unable to unit test when working with the Run< T > IConnection extension. I am injecting a custom HTTPClient into the connection class but it seems the deserialization process called from IRunner.RunPage in the SimpleQuery class, expects a specific format that is outside of the purposes of testing as I only want the result set obtained from the RunPage task.

The hard coded value in the httpclient is what the deserialize expects, not what it will output after deseralization.

How can I bypass this step?
or
What can I do to input custom data that will match the result?

var queryVariables = new Dictionary<string, object>
{
	{ "organization", "Whatever" },
	{ "count", 2 },
	{ "after", null }
};

var searchQuery = new Query()
	.Organization(login: Var("organization"))
	.Repositories(first: Var("count"), after: Var("after"))
	.Select(conn => new
	{
		conn.TotalCount,
		conn.PageInfo.EndCursor,
		conn.PageInfo.HasNextPage,
		Objects = conn.Nodes
			.OfType<GraphQLModel.Repository>()
			.Select(r => new
				{
					r.Name,
					r.Description
				}).ToList()
		})
	.Compile();

var httpClient = new Moq.Mock<HttpClient>().Object;
// client returns hard-coded value of  "{\"data\":{\"organization\":{\"repositories\":{\"totalCount\":10,\"endCursor\":{\"endCursor\":\"Y3Vyc29yOnYyOpHOHa9HHQ==\"},\"hasNextPage\":{\"hasNextPage\":true},\"nodes\":[{\"__typename\":\"Repository\",\"name\":\"my-repo-name\",\"description\":\"No matter\"}]}}}}" 

var graphQLProductHeader = new Octokit.GraphQL.ProductHeaderValue("UnitTests", "1.0.0");
var graphQLCredentialStore = new Octokit.GraphQL.Internal.InMemoryCredentialStore("yourToken");
var graphQLConnection = new Octokit.GraphQL.Connection(graphQLProductHeader, graphQLCredentialStore, httpClient);

// Invokes IConnection extension class Run<T> which invokes SimpleQuery.Runner.RunPage
var queryResults = await graphQLConnection.Run(searchQuery, queryVariables);

public async Task RunPage(CancellationToken cancellationToken = default)
{
var deserializer = new ResponseDeserializer();
var data = await connection.Run(parent.GetPayload(variables), cancellationToken).ConfigureAwait(false);
Result = deserializer.Deserialize(parent.ResultBuilder, data); //<---- BYPASS THIS
return false;
}