JPA测试的UniqueConstraint

Question

我想在JPA/Playframework测试的UniqueConstraint：

@Test 
    public void saveWithTitleNotUnique() { // not unique title 

     Software software1 = builder.template1().withTitle("title1").create(); 
     Software software2 = builder.template1().withTitle("title1").create(); 

     software1.save(); 

     try { 
      software2.save(); 
      fail("software.title is not unique"); 
     } catch (Exception ex) {} 

    } 

...

@Entity 
public class Software extends Model { 

    @Column(unique = true) 
    public String title; 

但测试失败每一次，因为没有任何异常发生。

Answer 1

我想通了：

我有一个错误，而建设的软件实例。所以，它可以工作并抛出异常。

@Test 
public void saveWithTitleNotUnique() { // not unique title 

    SoftwareTemplateBuilder builder1 = new SoftwareTemplateBuilder(); 
    Software software1 = builder1.template1().withTitle("title1").create(); 

    SoftwareTemplateBuilder builder2 = new SoftwareTemplateBuilder(); 
    Software software2 = builder2.template1().withTitle("title1").create(); 

    software1.save(); 

    try { 
     software2.save(); 
     fail("software.title is not unique"); 
    } catch (PersistenceException ex) {} 
} 

Answer 2

你还没有使软件的一个实例发生异常！ 你必须做：Software software = new Software();