Unit Test in Azure Function C#

I want to unit test my azure function API by sending mock request and response data. But my test is getting failed even if i pass same Json data on both request and response. TestCode

  [TestMethod]
    public async Task ClinicReadTestMethod()
    {
        //Arrange

        //var clinicRequest = new
        //{
        //    Id = "1",
        //    OpenIdProvider = "Google",
        //    Subject = "Test",
        //    Name = "Test",
        //    Address = "Test",
        //    Email = "Test",
        //    Phone = "Test",
        //    Notes = "Test"
        //};
        var query = new Dictionary<string, StringValues>();
        query.Add("openIdProvider", "Google");
        query.Add("subject", "Test");
        
        //var body = JsonSerializer.Serialize(clinicRequest); 
        var logger = Mock.Of<ILogger>();
        var client = Mock.Of<CosmosClient>(); 
        ContentResultFactory contentResultFactory = new ContentResultFactory();

        //Act
        var testFunction = new ClinicReadFunction(contentResultFactory);
        var result = await testFunction.Run(TestFactory.HttpRequestSetup(query), client, logger); //fixme
        var resultObject = JsonSerializer.Serialize(result as ContentResult);

        //Assert
        var clinicResponse = new 
        {
            Id = "1",
            openIdProvider = "Google",
            subject = "Test",
            Name = "Test",
            Address = "Test",
            Email = "Test",
            Phone = "Test",
            Notes = "Test"
        };
        var resultBody = JsonSerializer.Serialize(clinicResponse);
        //var res = contentResultFactory.CreateContentResult(HttpStatusCode.OK);
        Assert.AreEqual(resultBody, resultObject);
    }


    }

This is how my azure function looks like. It is taking two parameters and returning the response. I have tried to mock the data for unit test still no success. If anyone have idea how to unit test this azure function please let me know. //AzureFunction

 public async Task<IActionResult> Run(
        [HttpTrigger(AuthorizationLevel.Function, "get", Route = "")] HttpRequest req,
        [CosmosDB(
            databaseName: "",
            containerName: "",
            Connection = ""
            )] CosmosClient client,
        ILogger log)
    {
        string subject = req.Query["sub"];
        if (!Enum.TryParse(req.Query["idp"], out OpenIdProvider openIdProvider) || string.IsNullOrEmpty(subject))
        {
            var message = "";
            log.LogWarning();
            return _contentResultFactory.CreateContentResult(message, HttpStatusCode.BadRequest);
        }
        var query = client.GetContainer("", "").GetItemLinqQueryable<Clinic>()
            .Where(x => x.OpenIdProvider == openIdProvider && x.Subject == subject);
        Clinic clinic;
        using (var iterator = query.ToFeedIterator())
            clinic = (await iterator.ReadNextAsync()).FirstOrDefault();
        if (clinic == null)
        {
            log.LogWarning();
            return _contentResultFactory.CreateContentResult();
        }

        var response = new ClinicReadResponse(clinic);
        return _contentResultFactory.CreateContentResult(response, HttpStatusCode.OK);
    }

//TestFactory

  public static HttpRequest HttpRequestSetup(Dictionary<string, StringValues> query)
    {
        var context = new DefaultHttpContext();
        var request = context.Request;
        request.Query = new QueryCollection(query);
        request.Method = "GET";
        return request;
    }