包含getClassLoader（）的方法的java Junit。getResource（）

Question

我的代码中有以下服务类

public class MyServiceImpl {

public List<Group> getGroups() throws JAXBException {
List<Group> viewModel = new ArrayList<Group>();
File file = new File(MyServiceImpl.class.getClassLoader().getResource("filename").getPath());
.....
....
 }
}

我正试图为getGroups()方法编写Junit，但我仍然坚持创建一个新文件。我试过EasyMock和Mockito，但都没能成功

EasyMock.expect(MyServiceImpl.class.getClassLoader().getResource("filename").getPath()).andReturn("path");

当测试运行时，我得到以下信息

java.lang.NullPointerException
at com.mysite.services.content.MyServiceImplTest.testGetGroups(MyServiceImplTest.java:42)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:44)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:180)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:41)
at org.junit.runners.ParentRunner$1.evaluate(ParentRunner.java:173)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
at org.junit.runners.ParentRunner.run(ParentRunner.java:220)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

编辑

添加测试类

public class MyServiceImplTest {

private MyServiceImpl service;

@Before
public void setup() {
    service = new MyServiceImpl();
}

@Test
public void testGetGroups() throws Exception {
    EasyMock.expect(MyServiceImpl.class.getClassLoader().getResource("filename").getPath()).andReturn("path");

    service.getGroups();
}

感谢您的帮助。谢谢

Answer 1

我可以通过创建一个测试文件filename并将其放置在src/test/resource文件夹中来解决上述问题，当我运行测试时，它通过了

Answer 2

在添加了测试类之后，我看到了这个问题

试试这个：

public class MyServiceImplTest {
    private MyServiceImpl service;

    @Before
     public void setup() {
          service = EasyMock.createMock(MyServiceImpl.class);
     }

     @Test
      public void testGetGroups() throws Exception {

      EasyMock.expect(MyServiceImpl.getClass.getClassLoader()
      .getResource("filename")
      .getPath())
      .andReturn("path");

       EasyMock.replay(service);
       //Do something with Mock
       EasyMock.verify(service);

 }

如果你想打电话给服务部。getGroups（）您需要模拟该方法调用或使用部分模拟。请参见此处并搜索部分模拟：EasyMock Guide