How to unit test a service method

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WCF

Hi,
In my solution I added an unit test project where I added a service reference and need to test that method which is returning bool value.

How can I test it?

TestMethod]
public bool ValidateUser()
{
bool Result = false;
UserLoginArgs loginArgs = new UserLoginArgs();
loginArgs.UserId = "User_00001";
loginArgs.Password = ActorType.Doctor.ToString();
loginArgs.GroupId = "Group_123";
//service.ValidateUser(loginArgs);
ServiceReference1.UserLoginServiceClient client = new ServiceReference1.UserLoginServiceClient();
}


When right clicking on this method and click Debug Tests breaskpoint is not firing?.
Please explain me with an example

Thank You