Question

这是我为netbeans生成测试用例创建junit测试和自动化junit的代码，但我现在不知道如何进行测试，如果你们可以请给我一个例子。

class Account
{
    private double balance=100;
    private String accountNumber;
    private boolean firstTime=true;

public void deposit(double howMuch)
    {
         if(howMuch>0)
        {
            balance=balance+howMuch;
            System.out.println(howMuch+ "was successfully deposited into your account" + "The new balance of your account "+balance);
        }
        else
        {
           System.err.println("Please do not enter negative values");
        }
    }
}

这是junit测试类，请告诉我如何更改null值并运行testCase。

package BankSys;

import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;

/**
 *
 * @author SweAtBAr
 */
public class AccountTest {

    public AccountTest() {
    }

    @BeforeClass
    public static void setUpClass() {
    }

    @AfterClass
    public static void tearDownClass() {
    }

    @Before
    public void setUp() {
    }

    @After
    public void tearDown() {
    }

    /**
     * Test of deposit method, of class Account.
     */
    @Test(expected=NullPointerException.class)
    public void testDeposit() {
        System.out.println("deposit");
        double howMuch = 0.0;
        Account instance = null;
        instance.deposit(howMuch);
        // TODO review the generated test code and remove the default call to fail.
        fail("The test case is a prototype.");
       }

Answer 1

在方法testDeposit（）中，您应该实例化＆＃39;实例＆＃39;类型帐户。

Account instance = new Account();

您可以添加一个初始化帐号和余额（帐户类属性）的附加构造函数：

public class Account
{
  private double balance;
  private String accountNumber;
  private boolean firstTime;

  public void deposit(double howMuch)
  {
     if(howMuch>0)
     {
        balance=balance+howMuch;
        System.out.println(howMuch+ "was successfully deposited into your account" + "The new balance of your account "+balance);
    }
    else
    {
       System.err.println("Please do not enter negative values");
    }
  }

  public Account(final String accountNumber, final double balance) {
    this.accountNumber = accountNumber;
    this.balance = balance;
    this.firstTime = true;
  }

  public Account() {}

  public double getBalance() {
    return balance;
  } 

  public void setBalance(final double balance) {
    this.balance = balance;
  }

  // Add here setters/getters for accountNumber and firstTime
}

接下来在您的测试方法中，您必须在完成存款后检查余额值是否正确：

instance.deposit(howMuch);
assertEquals(expectedValue, instance.getBalance());

Answer 2

删除(expected=NullPointerException.class)，如果您不希望存款方法会抛出NullPointerException。

简单的测试用例是：

@Test
public void testDeposit() {
    System.out.println("deposit");
    double howMuch = 1.0;
    Account instance = new Account(); 
    instance.deposit(howMuch);

    // As mentioned by Olivier Meurice, you may have a method to get the balance
    // To test whether the account balance is correct
    assertEquals(1.0, instance.getBalance());
   }

如何为此提出一个junit测试用例？

2 个答案: