public async Task PostEndpoints()
{
string uri = "/customer";
var client = _factory.CreateClient();
var command = new CreateCustomerCommand
{
FirstName = "Herbert",
LastName = "Scrackle",
EmailAddress = "*****@*****.**"
};
var httpContent = command.ToHttpContent(_mediaType);
var response = await client.PostAsync(uri, httpContent).ConfigureAwait(false);
response.EnsureSuccessStatusCode();
response.Content.Headers.ContentType.ToString().Should().StartWith(_mediaType);
var theDto = response.Content.ReadAsJsonAsync <CustomerDto>();
theDto.Id.Should().BeGreaterThan(0);
}