java - PowerMockito doThrow 不抛出异常

Question

我正在尝试测试抛出的异常，但代码继续返回 true，而不是捕获异常并返回 false。

测试类

@RunWith(PowerMockRunner.class)
@PrepareForTest({Class1.class, Class2.class})
public class TestClass 
{

private Argument arg;
private static Class1 mockObj1;
private static Class2 mockObj2;

@BeforeClass
public static void initialSetup()
{
    PowerMockito.mockStatic(Class1.class);
    mockObj1 = PowerMockito.mock(Class1.class);
    mockObj2 = PowerMockito.mock(Class2.class);
}

@Before
public void setupForEachTest()
{   
    arg = new Argument();
}   

@Test
public void testUpdate() throws RemoteException
{
    PowerMockito.when(Class1.getDefault()).thenReturn(mockObj1);
    PowerMockito.when(mockObj1.getClass2()).thenReturn(mockObj2);
    PowerMockito.doThrow(new RemoteException()).when(mockObj2).save(arg);
    assertFalse(rule.update(null, null, null, null, null, null, null, null, null, null, null));
}

待测试的方法

public boolean update(params)
{   
    try
    {           
      Class1.getDefault().getClass2().save(args);
    }

    catch(RemoteException e)
    {
        Log.error(this, e);
        return false;
    }

    return true;
}

每次尝试运行此程序时，我都会收到断言错误，我已经尝试了 do throw 和 thenThrow 方法，如有任何帮助，我们将不胜感激。

编辑:

堆栈跟踪

java.lang.AssertionError: 
    at org.junit.Assert.fail(Assert.java:91)
    at org.junit.Assert.assertTrue(Assert.java:43)
    at org.junit.Assert.assertFalse(Assert.java:68)
    at org.junit.Assert.assertFalse(Assert.java:79)
    at package.TestClass.testUpdate(TestClass.java:92)
    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:606)
    at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:66)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:326)
    at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:86)
    at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:94)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:310)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:131)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.access$100(PowerMockJUnit47RunnerDelegateImpl.java:59)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner$TestExecutorStatement.evaluate(PowerMockJUnit47RunnerDelegateImpl.java:147)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.evaluateStatement(PowerMockJUnit47RunnerDelegateImpl.java:107)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest(PowerMockJUnit47RunnerDelegateImpl.java:82)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:298)
    at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:84)
    at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:49)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:218)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:160)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:134)
    at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:34)
    at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:44)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:136)
    at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:121)
    at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:57)
    at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:59)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

保存方法

public abstract int save(Argument paramarg)
throws RemoteException;

Answer 1

我对这个问题还是有点困惑。具体来说:

• @Before 方法中的测试实例 arg = new Argument()，这意味着 arg 与每个测试相关。
• 提供的 update() 方法声明如下所示:public boolean update(params)，它没有定义 params 参数的类型。
• 该问题还提供了 save() 方法的实现:int save(Argument paramarg) throws RemoteException;，这意味着 Argument arg 被传递到 update() 中，因此通过扩展，params 的类型必须是 Argument，但测试用例调用 rule.update(null, null, null, ...)

Anwyay，考虑到这些假设:

• update() 方法是:

  public boolean update(Argument params) {
      try {
          Class1.getDefault().getClass2().save(params);
      } catch (RemoteException e) {
          return false;
      }
  
      return true;
  }   
  

• save() 方法是；

  save(Argument arg) throws RemoteException
  

以下测试通过:

@RunWith(PowerMockRunner.class)
@PrepareForTest({Class1.class})
public class ATestClass {

    private Argument arg;
    private Class1 mockObj1;
    private Class2 mockObj2;

    @Before
    public void initialSetup() {
        PowerMockito.mockStatic(Class1.class);

        mockObj1 = Mockito.mock(Class1.class);

        mockObj2 = Mockito.mock(Class2.class);
    }

    @Before
    public void setupForEachTest() {
        arg = new Argument();
    }

    @Test
    public void testUpdate() throws RemoteException {
        PowerMockito.when(Class1.getDefault()).thenReturn(mockObj1);
        Mockito.when(mockObj1.getClass2()).thenReturn(mockObj2);

        Mockito.when(mockObj2.save(Mockito.any(Argument.class))).thenThrow(new RemoteException());

        Assert.assertFalse(update(arg));
    }
}

注意:您只需要使用 PowerMock 来处理此调用:Class1.getDefault()，所有其他模拟调用既不是静态的也不是最终的，因此 Mockito 就足够了。