public async Task CreateAsync_Should_Add_Json_To_User_And_Return_True(string username, JsonModel jsonModel)
{
var jsonModelRepository = default(JsonModel);
_jsonRepository
.When(x => x.AddJsonAsync(username, Arg.Any <JsonModel>()))
.Do(x => jsonModelRepository = (JsonModel)x[1]);
var result = await _jsonServiceInstance.CreateAsync(username, jsonModel);
Assert.IsTrue(result);
Assert.AreEqual(jsonModel, jsonModelRepository);
}
