使用带有泽西测试 + TestNG 的 powermock 测试泽西岛休息服务时出现问题

Question

开发了使用泽西岛的休息服务。现在我想为这个 Web 服务编写一些集成测试，但由于并非从 Web 服务中使用的每个类都已经实现，我需要模拟其中的一些。例如，我有以下类：

public class ServiceA {
public String getService() {
return null;
}}
@Path("/myresource")
public class ResourceController {
@GET 
@Produces("text/plain")
public String getIt() {
ServiceA a = new ServiceA();
return a.getService();
}}

然后我想测试使用 Jersey 测试框架和 TestNg + Powermock(使用构造函数模拟新对象(进行集成测试。

import org.glassfish.jersey.server.ResourceConfig;
import org.glassfish.jersey.test.JerseyTestNg;
import org.glassfish.jersey.test.jdkhttp.JdkHttpServerTestContainerFactory;
import org.glassfish.jersey.test.spi.TestContainerFactory;
import org.mockito.Mockito;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.core.classloader.annotations.PowerMockIgnore;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.testng.PowerMockObjectFactory;
import org.testng.Assert;
import org.testng.IObjectFactory;
import org.testng.annotations.ObjectFactory;
import org.testng.annotations.Test;
import javax.ws.rs.core.Application;
import javax.ws.rs.core.Response;
import static org.powermock.api.mockito.PowerMockito.mock;
@PowerMockIgnore({"javax.ws.*", "org.glassfish.*"})
@PrepareForTest({ResourceController.class})
public class ResourceControllerTest extends JerseyTestNg.ContainerPerMethodTest {
@Override
protected Application configure() {
return new ResourceConfig(ResourceController.class);
}
@Override
protected TestContainerFactory getTestContainerFactory() {
return new JdkHttpServerTestContainerFactory();
}
@ObjectFactory
public IObjectFactory getObjectFactory() {
return new PowerMockObjectFactory();
}

@Test
public void getItTest() {
ServiceA mockA = mock(ServiceA.class);
Mockito.when(mockA.getService()).thenReturn("service a");
PowerMockito.whenNew(ServiceA.class).withAnyArguments().thenReturn(mockA);
Response result = target("myresource").request().get();
Assert.assertEquals(result.readEntity(String.class), "service a");
}
}

我的绒球依赖：

<dependency>
<groupId>org.glassfish.jersey.test-framework.providers</groupId>
<artifactId>jersey-test-framework-provider-inmemory</artifactId>
<version>2.21</version>
</dependency> 
<dependency>
<groupId>org.glassfish.jersey.test-framework</groupId>
<artifactId>jersey-test-framework-core</artifactId>
<version>2.21</version>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-module-testng</artifactId>
<version>1.7.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-api-mockito</artifactId>
<version>1.7.0</version>
<scope>test</scope>
</dependency>

但是在运行时，getIt(( 方法中的实例 ServiceA 仍然被初始化为新的 ServiceA 对象，而不是 mockA 对象。

知道吗？谢谢

如果添加 PowerMockIgnore({"javax.ws.">， "org.glassfish.">}(，则请参阅下面的异常：

java.lang.ExceptionInInitializerError
at org.mockito.internal.exceptions.stacktrace.ConditionalStackTraceFilter.<init>(ConditionalStackTraceFilter.java:17)
at org.mockito.exceptions.base.MockitoException.filterStackTrace(MockitoException.java:41)
at org.mockito.exceptions.base.MockitoException.<init>(MockitoException.java:30)
at org.mockito.exceptions.misusing.MockitoConfigurationException.<init>(MockitoConfigurationException.java:18)
at org.mockito.internal.configuration.plugins.PluginLoader.loadImpl(PluginLoader.java:66)
at org.mockito.internal.configuration.plugins.PluginLoader.loadPlugin(PluginLoader.java:24)
at org.mockito.internal.configuration.plugins.PluginRegistry.<init>(PluginRegistry.java:12)
at org.mockito.internal.configuration.plugins.Plugins.<clinit>(Plugins.java:11)
at org.mockito.internal.util.MockUtil.<clinit>(MockUtil.java:24)
at org.mockito.internal.configuration.injection.scanner.MockScanner.<init>(MockScanner.java:22)
at org.mockito.internal.configuration.InjectingAnnotationEngine.injectMocks(InjectingAnnotationEngine.java:96)
at org.powermock.api.mockito.internal.configuration.PowerMockitoInjectingAnnotationEngine.process(PowerMockitoInjectingAnnotationEngine.java:35)
at org.powermock.api.extension.listener.AnnotationEnabler.injectSpiesAndInjectToSetters(AnnotationEnabler.java:72)
at org.powermock.api.extension.listener.AnnotationEnabler.beforeTestMethod(AnnotationEnabler.java:64)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.powermock.reflect.internal.WhiteboxImpl.performMethodInvocation(WhiteboxImpl.java:1846)
at org.powermock.reflect.internal.WhiteboxImpl.invokeMethod(WhiteboxImpl.java:700)
at org.powermock.reflect.Whitebox.invokeMethod(Whitebox.java:415)
at org.powermock.modules.testng.internal.PowerMockTestNGMethodHandler.injectMocksUsingAnnotationEnabler(PowerMockTestNGMethodHandler.java:76)
at org.powermock.modules.testng.internal.PowerMockTestNGMethodHandler.invoke(PowerMockTestNGMethodHandler.java:48)
at com.hp.ucmdb.rest.ResourceControllerTest_$$_jvstb11_0.setUp(ResourceControllerTest_$$_jvstb11_0.java)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:86)
at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:514)
at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:215)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:589)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:820)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1128)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:129)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:112)
at org.testng.TestRunner.privateRun(TestRunner.java:782)
at org.testng.TestRunner.run(TestRunner.java:632)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:366)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:361)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:319)
at org.testng.SuiteRunner.run(SuiteRunner.java:268)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1244)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1169)
at org.testng.TestNG.run(TestNG.java:1064)
at org.testng.IDEARemoteTestNG.run(IDEARemoteTestNG.java:72)
at org.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:127)
Caused by: java.lang.NullPointerException
at org.mockito.internal.configuration.plugins.Plugins.getStackTraceCleanerProvider(Plugins.java:17)
at org.mockito.internal.exceptions.stacktrace.StackTraceFilter.<clinit>(StackTraceFilter.java:21)
... 49 more

Answer 1

我相信模拟可能没有发生，因为你没有将PowerMock的对象工厂实现连接到TestNG。

为了让 powermockito 和 TestNG 相互配合，您必须执行以下操作：

配置 TestNG

• 以使用 PowerMock 对象工厂：您可以通过套件 xml 的<suite>标记中的属性object-factory或通过@org.testng.annotations.ObjectFactory注释方法执行此操作，该方法返回 powermock 对 TestNG 接口的实现org.testng.IObjectFactory即org.powermock.modules.testng.PowerMockObjectFactory(或(通过扩展org.powermock.modules.testng.PowerMockTestCase
• 使用 @PrepareForTest 准备静态类，以便被 PowerMockit 模拟

我在您的代码中使用 PowerMock 的对象工厂接线找不到任何对您引用。你能尝试这样做，看看是否有帮助吗？

详情请看这里。

更新：为了通过ClassCastException，您需要将以下注释添加到您的类中。

@org.powermock.core.classloader.annotations.PowerMockIgnore({"javax.ws.*", "org.glassfish.*"})

有关此内容的更多详细信息，请参阅此堆栈溢出问题

PS ：我假设您正在使用以下注释让 powermock 准备您的测试类以进行模拟(您的问题中的样本显示了其他内容(

@org.powermock.core.classloader.annotations.PrepareForTest({ResourceController.class})