In a test procedure, you must define a variable to hold the reference to the class instance. Since you are defining a variable of a class type, you must specify a using statement for that class at the top of your procedure.

Here is the setup code for testing the Emp class. It first specifies the Enterprise.HR.Emp class in a using statement. Then, it defines the variable, EmpInstance that will hold a reference to the Emp class instance. Next, it specifies the file where test output will be written.

block-level on error undo, throw.
using Enterprise.HR.Emp.
// define the variable for holding the Emp instance 
var Emp EmpInstance.
// set up the file for writing data
output to "/testResults/log/testEmp.out".
// more of test procedures