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Mock pattern



using mock pattern


TestPayroll

public void testPayroll()
{
   MockEmployeeDatabase db = new MockEmployeeDatabase();
   MockCheckWriter w = new MockCheckWriter();
   Payroll p = new Payroll(db, w);
   p.payEmployees();
   assert(w.checksWereWrittenCorrectly());
   assert(db.paymentsWerePostedCorrectly());
}

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