C# Nunit Unit Testing

using NUnit.Framework;

namespace MyUnitTest
{
    [TestFixture]
    class Test7CalDay
    {
        [Test]
        public void test1()
        {
            CalculateDayService.CalculateDayServiceClient client = new CalculateDayService.CalculateDayServiceClient();
            string day1 = "20140801";
            string day2 = "20140802";
            int diff = client.CalculateDay(day1, day2);
            Assert.AreEqual(1, diff);
        }
    }
}