public void GetEmployeePicture()
{
Guid employeeId = Guid.NewGuid();
Stream pictureStream = new MemoryStream();
repository.GetEmployeePicture(employeeId).Returns(pictureStream);
HttpResponseMessage result = sut.GetEmployeePicture(employeeId);
var resultContent = result.Content as ByteArrayContent;
Assert.AreEqual(HttpStatusCode.OK, result.StatusCode);
Assert.IsNotNull(resultContent);
Assert.AreEqual("image/jpg", resultContent.Headers.ContentType.MediaType);
}