Locally testing Azure Functions with DocumentDB (client library) and receiving 'Invalid API version' for 1.13.2 to 1.17.0 - azure

Question

I'm testing Azure Functions locally using VS2017 (Preview 7.1). The function writes to DocumentDB locally using the emulator (1.11.136.2) and everything works fine when using Microsoft.Azure.DocumentDB 1.13.1. As soon as I upgrade to any of the newer versions (1.13.2 to 1.17.0), I receive the following error:
Invalid API version. Ensure a valid x-ms-version header value is passed.
When calling the function from Postman I add a x-ms-version: 2017-02-22 header, but I suspect this is required only for the REST API.
using Microsoft.Azure.Documents;
using Microsoft.Azure.Documents.Client;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.Azure.WebJobs.Host;
using System;
using System.Configuration;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;
namespace AzureFunction
{
public static class Function1
{
private static readonly ConnectionPolicy connectionPolicy =
new ConnectionPolicy
{
UserAgentSuffix = " tilt",
ConnectionMode = ConnectionMode.Direct,
ConnectionProtocol = Protocol.Tcp,
EnableEndpointDiscovery = false,
};
[FunctionName("FunctionApp")]
public static async Task<HttpResponseMessage> Run(
[HttpTrigger(AuthorizationLevel.Function, "post", Route = "func/app")]HttpRequestMessage req, TraceWriter log)
{
string setting = ConfigurationManager.AppSettings["DOCUMENTDB"];
string databaseName = "test1";
Tuple<Uri, string> conn = Connection(setting);
using (var client = new DocumentClient(conn.Item1, conn.Item2, connectionPolicy))
{
// error thrown at next line
await client.CreateDatabaseIfNotExistsAsync(new Database { Id = databaseName });
}
return req.CreateResponse(HttpStatusCode.OK);
}
static Tuple<Uri, string> Connection(string configSetting)
{
string[] setting = configSetting.Split(';');
string endpoint = setting[0].Split('=')[1];
string key = setting[1].Split('=')[1] + "==";
var t = new Tuple<Uri, string>(new Uri(endpoint), key);
return t;
}
}
}
I could continue using 1.13.1, but I would like to start using Graph DB which is not compatible with this version.
Why am I receiving this error for the client library, and why only from version 1.13.2?

Answer 1

It turns out the emulator was the incorrect version. For Microsoft.Azure.DocumentDB 1.14.0 and above, Azure DocumentDB Emulator 1.13.58.2 is required, which I installed from here https://chocolatey.org/packages/azure-documentdb-emulator.
Seems this site https://learn.microsoft.com/en-us/azure/cosmos-db/local-emulator points to the old version.