public void CreateExpiredJob_ThrowsAnException_WhenJobIsNull()
        {
            var exception = Assert.Throws <ArgumentNullException>(
                () => _connection.CreateExpiredJob(
                    null,
                    new Dictionary <string, string>(),
                    DateTime.UtcNow,
                    TimeSpan.Zero));

            Assert.Equal("job", exception.ParamName);
        }