我现在陷入了困境。我已经进行了大量搜索,但是我找不到最简单的方法来测试实体类或针对Postgres数据库的JPA操作。我已经找到了使用Spring、Mockito和其他工具的方式,但是我找不到使用纯Java的最简单的方式。
我有以下JUnit测试:
public class ModelConverterTest {
private static EntityManagerFactory emf;
private static EntityManager em;
public ModelConverterTest() {
}
@BeforeClass
public static void setUpClass() throws Exception {
emf = Persistence.createEntityManagerFactory("PU");
em = emf.createEntityManager(); // Retrieve an application managed entity manager
}
@AfterClass
public static void tearDownClass() throws Exception {
em.close();
emf.close(); //close at application end
}
@Before
public void setUp() {
...
}
@After
public void tearDown() {
}
/**
* Test of SIMModelToModel method, of class ModelConverter.
*/
@Test
public void testSIMModelToModel() {
System.out.println("SIMModelToModel");
SIMModel simModel = new PESMModel();
simModel.addState(testState);
Model expResult = null;
Model result = ModelConverter.SIMModelToModel(em, simModel);
assertTrue(expResult!=null);
// TODO review the generated test code and remove the default call to fail.
//fail("The test case is a prototype.");
}
}
当我运行它时,会出现以下错误:
java.lang.ClassFormatError: Absent Code attribute in method that is not native or abstract in class file javax/persistence/PersistenceContextType
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:787)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:447)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2442)
at java.lang.Class.getDeclaredMethods(Class.java:1808)
at sun.reflect.annotation.AnnotationType$1.run(AnnotationType.java:104)
at sun.reflect.annotation.AnnotationType$1.run(AnnotationType.java:101)
at java.security.AccessController.doPrivileged(Native Method)
at sun.reflect.annotation.AnnotationType.<init>(AnnotationType.java:100)
at sun.reflect.annotation.AnnotationType.getInstance(AnnotationType.java:84)
at sun.reflect.annotation.AnnotationParser.parseAnnotation(AnnotationParser.java:221)
at sun.reflect.annotation.AnnotationParser.parseAnnotations2(AnnotationParser.java:88)
at sun.reflect.annotation.AnnotationParser.parseAnnotations(AnnotationParser.java:70)
at java.lang.reflect.Field.declaredAnnotations(Field.java:1033)
at java.lang.reflect.Field.getDeclaredAnnotations(Field.java:1026)
at java.lang.reflect.AccessibleObject.getAnnotations(AccessibleObject.java:196)
at org.junit.runners.model.FrameworkField.getAnnotations(FrameworkField.java:26)
at org.junit.runners.model.TestClass.addToAnnotationLists(TestClass.java:52)
at org.junit.runners.model.TestClass.<init>(TestClass.java:45)
at org.junit.runners.ParentRunner.<init>(ParentRunner.java:73)
at org.junit.runners.BlockJUnit4ClassRunner.<init>(BlockJUnit4ClassRunner.java:55)
at org.junit.internal.builders.JUnit4Builder.runnerForClass(JUnit4Builder.java:13)
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57)
at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:29)
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57)
at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:24)
at org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:51)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:123)
at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:104)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:164)
at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:110)
at org.apache.maven.surefire.booter.SurefireStarter.invokeProvider(SurefireStarter.java:175)
at org.apache.maven.surefire.booter.SurefireStarter.runSuitesInProcessWhenForked(SurefireStarter.java:107)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:68)
我的 persistence.xml 文件如下:
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="PU" transaction-type="JTA">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<jta-data-source>jdbc/modelsystemdb</jta-data-source>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties/>
</persistence-unit>
</persistence>
我该怎么做才能让测试运行起来?