pruebas unitarias

.cs

[TestClass()]  
    public class AccountTests  
    {  
         [TestMethod()]
         public void CurrentBallanceTestPositiveCase()
         {
            IAccount account = new Account();
            account.Deposit(100);
            double result = account.CurrentBallance;
            Assert.AreEqual(100, result);
         }
 
        [TestMethod()]  
        public void DepositTestPositiveCase()  
        {  
            IAccount account = new Account();  
            double result = account.Deposit(100);  
            Assert.AreEqual(100, result);  
        }  

         
         [TestMethod()]
         [ExpectedException(typeof(ArgumentException))]
         public void DepositTestNegativeAmount()
         {
            IAccount account = new Account();
            double result = account.Deposit(-100);
         }
        
        [TestMethod()]  
        public void WithdrawTestPositiveCase()  
        {  
            IAccount account = new Account();  
            account.Deposit(500);  
            double result = account.Withdraw(400);  
            Assert.AreEqual(100, result);  
        }  
  
        [TestMethod()]  
        [ExpectedException(typeof(ArgumentException))]  
        public void WithdrawTestNegativeWithdrawAmount()  
        {  
            IAccount account = new Account();  
            account.Deposit(200);  
            double result = account.Withdraw(-300);             
        }  
  
        [TestMethod()]  
        [ExpectedException(typeof(ArgumentException))]  
        public void WithdrawTestWithMoreWithdrawAmountThanDeposit()  
        {  
            IAccount account = new Account();  
            account.Deposit(200);  
            double result = account.Withdraw(300);             
        }  
    }