public void ShouldReturnAStudentWhenDocumentExist()
        {
            var expression = StudentQueries.GetStudentInformation("99999999999");
            var student    = _students.AsQueryable().Where(expression).FirstOrDefault();

            Assert.AreNotEqual(null, student);
        }
        public void ShouldReturnNullWhenDocumentDoesNotExist()
        {
            var expression = StudentQueries.GetStudentInformation("12345678901");
            var student    = _students.AsQueryable().Where(expression).FirstOrDefault();

            Assert.AreEqual(null, student);
        }