java - powermock 中意外的方法调用异常

Question

我的项目有以下调用链

Impl.execute() --> Helper.help() --> Proxy.doOperation()

我正在尝试在 PowerMock 和 TestNG 中执行 Impl.execute() 的测试用例。我遇到以下异常

execute(ImplTest)  Time elapsed: 0.391 sec  <<< FAILURE!
java.lang.AssertionError: 
Unexpected method call Proxy.doOperation({clientId=123456}, ""):
Proxy.doOperation({}, null): expected: 1, actual: 0
at org.easymock.internal.MockInvocationHandler.invoke(MockInvocationHandler.java:44)
at org.easymock.internal.ObjectMethodsFilter.invoke(ObjectMethodsFilter.java:85)
at org.easymock.internal.ClassProxyFactory$MockMethodInterceptor.intercept(ClassProxyFactory.java:94)
at com.xxx.xxx.xxx.sync.services.Proxy$$EnhancerByCGLIB$$1937be76.doOperation(<generated>)
at com.xxx.xxx.xxx.sync.services.helper.Helper.getIdFromClient(Helper.java:39)
at com.xxx.xxx.xxx.sync.services.impl.Impl.execute(Impl.java:97)
at com.xxx.xxx.xxx.sync.services.impl.ImplTest.execute(ImplTest.java:130)

我写了下面的代码

@PrepareForTest({ApplicationContextLoader.class,Helper.class})
@PowerMockIgnore({"javax.management.*", "javax.xml.*","org.xml.*","org.w3c.dom.*"})
public class ImplTest extends PowerMockTestCase {

   @ObjectFactory
   /**
    * Configure TestNG to use the PowerMock object factory.
    */
   public IObjectFactory getObjectFactory() {
      return new org.powermock.modules.testng.PowerMockObjectFactory();
   }

@Test
 public void execute() {

Impl impl = new Impl();

    Proxy regProxy = PowerMock.createMock(Proxy.class);
    PowerMock.expectNew(Proxy.class).andReturn(regProxy);   
    expect(regProxy.doOperation(Matchers.anyMap(),Matchers.any(String.class))).andReturn(someString);
    PowerMock.replayAll();
    Assert.assertEquals(impl.execute(request, ""),"");
    PowerMock.verifyAll();
  }

}

请帮忙

Answer 1

试试这个

Proxy regProxy = PowerMock.createNiceMock(Proxy.class);

当您在链式方法中执行 EasyMock.createMock() 时，它会失败，因为 Easymock 无法识别该方法将在其他地方调用，但是当我们执行 EasyMock.createNiceMock 时() 在这个意外的方法上，模拟不会失败，并且可以按照我们想要的方式执行模拟。

事实上，我花了大约一周的时间来解决这个错误，当我找到这个解决方法时，这就像是一种祝福。

希望这有帮助! 祝你好运!