Question

我试着编写两个简单的第一个测试函数。

我要测试的第一个函数是一个创建函数：

    public Milestone create(Milestone milestone) throws ClassNotFoundException, SQLException {
    String id = UUID.randomUUID().toString();
    milestone.setId(id);

    Class.forName("org.h2.Driver");
    Connection connection = DriverManager.getConnection("jdbc:h2:~/dao_db", "sa", "");
    PreparedStatement prepareStatement = connection.prepareStatement("INSERT INTO MILESTONE VALUES(?, ?,?)");

    prepareStatement.setString(1, id);
    prepareStatement.setString(2, milestone.getName());
    prepareStatement.setString(3, milestone.getDescription());
    prepareStatement.executeUpdate();

    connection.close();
    return milestone;}

第二个是更新功能：

    public Milestone update(Milestone milestone) throws ClassNotFoundException, SQLException{

    Class.forName("org.h2.Driver");
    Connection connection = DriverManager.getConnection("jdbc:h2:~/dao_db", "sa", "");
    PreparedStatement prepareStatement = connection.prepareStatement("UPDATE MILESTONE SET NAME=?, DESCRIPTION = ? WHERE ID=?");

    prepareStatement.setString(1, milestone.getName());
    prepareStatement.setString(2, milestone.getDescription());
    prepareStatement.setString(3, milestone.getId());
    prepareStatement.executeUpdate();

    connection.close();     
    return milestone;};

然后，我尝试编写这两个函数：

    import static org.junit.Assert.*;
    import java.sql.SQLException; 
    import org.junit.Test;
    import model.Milestone;

    public class MilestoneDAOImplTest {

@Test
public void createTest() throws ClassNotFoundException, SQLException {
    MilestoneDAOImpl ms = new MilestoneDAOImpl();
    Milestone milestone = new Milestone("test","test");
    assertNotNull("milestone created", ms.create(milestone));   }

@Test
public void updateTest() throws ClassNotFoundException, SQLException {
    MilestoneDAOImpl ms = new MilestoneDAOImpl();
    Milestone milestone = new Milestone("test","test");
    assertNotNull("milestone updated", ms.update(milestone));   }

如果这两个测试功能是否正确，你能告诉我吗？因为我发现做这样的测试有点没用。我的意思是在我的createTest函数中，唯一的验证是

    assertNotNull("milestone created", ms.create(milestone));

但是我也可以通过做同样的事情来验证我的主类（同样的函数ms.create（里程碑）。那么，这些测试的实际效用是什么？（如果这些测试是正确的？）我没有'看到真正的区别（我是Java中的新手）。

Answer 1

在您的测试课程中，您可以另外检查以下内容 1.对于抛出的每个异常，您可以断言是否在特定方案中抛出特定异常。例如。

   @Test
   public void createTest() throws ClassNotFoundException, SQLException {
   try{
   MilestoneDAOImpl ms = new MilestoneDAOImpl();
Milestone milestone = new Milestone("test","test");
assertNotNull("milestone updated", ms.update(milestone));   
}catch (ClassNotFoundException e1)
{
// do some assertions based on scenarios like some relevent jars are missed in classpath
}
catch (SQLException e2)
{
// do some assertions like wrong connection URL etc.
}
}

断言插入＆amp;根据需要在DB中执行更新操作。在DAO层中创建select方法，

public Milestone select(String milestoneId) throws ClassNotFoundException, SQLException{
select * from MILESTONE  where ID=milestoneId
transform resultset into Milestone object
return MilestoneObject;
}

从你的测试方法调用它来断言例如。

   @Test
   public void updateTest() throws ClassNotFoundException, SQLException {
MilestoneDAOImpl ms = new MilestoneDAOImpl();
Milestone milestone = new Milestone("test","test");
assertNotNull("milestone updated", ms.update(milestone));  
Milestone milestone1=ms.select(milestone.getId());

assertEquals(milestone1.getName(),milestone.getName());
assertEquals(milestone1.getdescrition(),milestone.getDescription());
        }

希望这有帮助。

创建两个（junit）测试函数

1 个答案: