使用带有 Jersey Test + TestNg 的 powermock 测试 Jersey 休息服务时的问题

Question

开发了一个使用Jersey的休息服务。现在我想为此 Web 服务编写一些集成测试，但由于并非 Web 服务中使用的每个 class 都已经实现，我需要模拟其中的一些。例如我有以下 class:

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 pom 依赖项：

    <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。

有什么想法吗？谢谢，

如果添加 PowerMockIgnore({"javax.ws.", "org.glassfish."})，则见以下异常：

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

我相信模拟可能不会发生，因为您没有将 PowerMock 的对象工厂实现连接到 TestNG。

为了让 powermockito 和 TestNG 相互协作，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> 标签中的属性 object-factory 或通过 @org.testng.annotations.ObjectFactory 注释方法，其中 returns powermock 的 TestNG 接口实现 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 class 以供 PowerMockit

我无法在您的代码中使用 PowerMock 的对象工厂接线找到任何对您的引用。你能试试看是否有帮助吗？

请参阅了解完整详情。

更新： 为了通过 ClassCastExceptions，您需要将以下注释添加到您的 class.

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

有关此的更多详细信息，请参阅this Whosebug问题

PS ：我假设您正在使用以下注释让 powermock 准备您的测试 class 以进行模拟（您问题中的示例显示了其他内容）

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

使用带有 Jersey Test + TestNg 的 powermock 测试 Jersey 休息服务时的问题

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