Java 使用PowerMock-EasyMock时发生意外的方法调用

我的问题似乎是对嘲笑的误解。用于测试的代码

public class CallHandler {
    private SqlSessionFactory sessionFactory;
    public CallHandler() {
        String resource = "mybatis/mybatis-config.xml";
        Reader reader;
        try {
            reader = Resources.getResourceAsReader(resource);
            sessionFactory = new SqlSessionFactoryBuilder().build(reader);
        }
        catch (IOException e) {
            e.printStackTrace();
        }
    }

    public String handleRequest(Call call) {
        // Some Implementation
    }
}

考试班

// I have excluded few unnecessary classes from @PrepareForTest for the post.

@RunWith(PowerMockRunner.class)
@PrepareForTest({SqlSessionFactoryBuilder.class, Resources.class, SqlSessionFactory.class, SqlSession.class})
public class TestCase0 extends TestCase{
    private SqlSessionFactory mockedSessionFactory = PowerMock.createMock(SqlSessionFactory.class);
    private SqlSession mockedSession = PowerMock.createMock(SqlSession.class);
    private CallMapper mockedMapper = PowerMock.createMock(CallMapper.class);
    private SqlSessionFactoryBuilder mockedSqlSessionFactoryBuilder= PowerMock.createMock(SqlSessionFactoryBuilder.class);
    // Others

    @Before
    public void setUp() {
    }

    @Test
    public void test0 () throws Exception {
        mockStatic(CallMapper.class);
        mockStatic(SqlSessionFactoryBuilder.class);
        mockStatic(Resources.class);
        expect(Resources.getResourceAsReader("mybatis/mybatis-config.xml")).andReturn(mockedReader);      expectNew(SqlSessionFactoryBuilder.class).andReturn(mockedSqlSessionFactoryBuilder);  expect(mockedSqlSessionFactoryBuilder.build(mockedReader)).andReturn(mockedSessionFactory);
        expect(mockedSessionFactory.openSession()).andReturn(mockedSession);
        // Few more expectations
        replayAll();
        assertThat(RESULT0).isEqualTo((new CallHandler()).handleRequest(call));
        verifyAll();
    }
}

在新的

SqlSessionFactoryBuilder

上模拟调用build似乎没有生效，因为调用了原始的

build（）

，因此出现了错误。堆栈跟踪

java.lang.AssertionError: 
Unexpected method call Reader.close();
at org.easymock.internal.MockInvocationHandler.invoke(MockInvocationHandler.java:44)
at org.powermock.api.easymock.internal.invocationcontrol.EasyMockMethodInvocationControl.invoke(EasyMockMethodInvocationControl.java:91)
at org.powermock.core.MockGateway.doMethodCall(MockGateway.java:105)
at org.powermock.core.MockGateway.methodCall(MockGateway.java:168)
at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:58)
at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:38)
at com.kwench.integration.ivr.CallHandler.<init>(CallHandler.java:48)
at in.kwench.integration.ivr.TestCase0.test0(TestCase0.java:131)
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:68)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:310)
at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:88)
at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:96)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:294)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:127)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest(PowerMockJUnit47RunnerDelegateImpl.java:82)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:282)
at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:86)
at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:49)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:207)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:146)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:120)
at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:33)
at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:45)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:118)
at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:104)
at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:53)
at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:53)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)

java.lang.AssertionError:
意外的方法调用读取器.close（）；
位于org.easymock.internal.MockInvocationHandler.invoke（MockInvocationHandler.java:44）
位于org.powermock.api.easymock.internal.invocationcontrol.EasyMockMethodInvocationControl.invoke（EasyMockMethodInvocationControl.java:91）
位于org.powermock.core.MockGateway.doMethodCall（MockGateway.java:105）
位于org.powermock.core.MockGateway.methodCall（MockGateway.java:168）
位于org.apache.ibatis.session.SqlSessionFactoryBuilder.build（SqlSessionFactoryBuilder.java:58）
位于org.apache.ibatis.session.SqlSessionFactoryBuilder.build（SqlSessionFactoryBuilder.java:38）
位于com.kwench.integration.ivr.CallHandler。（CallHandler.java:48）
位于in.kwench.integration.ivr.TestCase0.test0（TestCase0.java:131）
在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）处
在sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）中
在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）中
位于java.lang.reflect.Method.invoke（Method.java:606）
位于org.junit.internal.runners.TestMethod.invoke（TestMethod.java:68）
位于org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runTestMethod（PowerMockJUnit44RunnerDelegateImpl.java:310）
位于org.junit.internal.runners.MethodRoadie$2.run（MethodRoadie.java:88）
位于org.junit.internal.runners.MethodRoadie.runbeforesthentestthenuter（MethodRoadie.java:96）
位于org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest（PowerMockJUnit44RunnerDelegateImpl.java:294）
位于org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper（PowerMockJUnit47RunnerDelegateImpl.java:127）
位于org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest（PowerMockJUnit47RunnerDelegateImpl.java:82）
位于org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runbeforesthenTesttheAfter（PowerMockJUnit44RunnerDelegateImpl.java:282）
位于org.junit.internal.runners.MethodRoadie.runTest（MethodRoadie.java:86）
位于org.junit.internal.runners.MethodRoadie.run（MethodRoadie.java:49）
位于org.powermock.modules.junit4.internal.impl.powermockjunit44runnerdelegateinpl.invokeTestMethod（powermockjunit44runnerdelegateinpl.java:207）
位于org.powermock.modules.junit4.internal.impl.powermockjunit44runnerdelegateinpl.runMethods（powermockjunit44runnerdelegateinpl.java:146）
位于org.powermock.modules.junit4.internal.impl.powermockjunit44runnerdelegateinpl$1.run（powermockjunit44runnerdelegateinpl.java:120）
位于org.junit.internal.runners.ClassRoadie.runUnprotected（ClassRoadie.java:33）
位于org.junit.internal.runners.ClassRoadie.runProtected（ClassRoadie.java:45）
位于org.powermock.modules.junit4.internal.impl.powermockjunit44runnerdelegateinpl.run（powermockjunit44runnerdelegateinpl.java:118）
位于org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run（JUnit4TestSuiteChunkerImpl.java:104）
位于org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run（AbstractCommonPowerMockRunner.java:53）
位于org.powermock.modules.junit4.PowerMockRunner.run（PowerMockRunner.java:53）
位于org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run（JUnit4TestReference.java:50）

如果没有您正在测试的代码和测试类本身的完整示例，很难说问题会出现在哪里

话虽如此，我猜您的问题在于您没有准备使用静态方法的类。这些需要在测试类开始时的@PrepareForTest注释中提供

PowerMock的文档提供了以下模拟静态方法的技巧。我猜你错过了第二点

模拟静态方法 快速总结

在测试用例的类级别使用@RunWith（PowerMockRunner.class）注释

在测试用例的类级别使用@PrepareForTest（包含StaticMethod.class的类）注释

使用PowerMock.mockStatic（包含StaticMethod.class的类）来模拟此类的所有方法

使用PowerMock.replay（包含StaticMethod.class的类）将类更改为replay模式

使用PowerMock.verify（包含StaticMethod.class的类）将类更改为验证模式

你也嘲笑构造函数调用<代码> SqlSessionFactoryBuilder <代码>，所以你也需要考虑这个技巧。 新对象的模拟构造 快速总结

在测试用例的类级别使用@RunWith（PowerMockRunner.class）注释

在测试用例的类级别使用@PrepareForTest（创建NewInstance.class的类）注释

使用PowerMock.createMock（NewInstanceClass.class）创建应该构造的类的mock对象（我们称之为mockObject）

使用PowerMock.expectNew（NewInstanceClass.class）.andReturn（mockObject）来预期NewInstanceClass.class类型的对象的新构造，但返回模拟对象

使用PowerMock.replay（mockObject，NewInstanceClass.class）将模拟对象和类更改为重播模式，或者使用PowerMock.replayAll（）方法

使用PowerMock.verify（mockObject，NewInstanceClass.class）更改模拟对象和类以验证模式，或者使用PowerMock.verifyAll（）me

@RunWith(PowerMockRunner.class)
@PrepareForTest({CallHandler.class, SqlSessionFactoryBuilder.class, Resources.class})
public class CallHandlerTest {

    private static final String RESULT0 = "";

    @Test
    public void test0 () throws Exception {
        final Reader mockedReader = EasyMock.createMock(Reader.class);
        final SqlSessionFactoryBuilder mockedSqlSessionFactoryBuilder = EasyMock.createMock(SqlSessionFactoryBuilder.class);
        final SqlSessionFactory mockedSessionFactory = EasyMock.createMock(SqlSessionFactory.class);

        PowerMock.mockStatic(SqlSessionFactoryBuilder.class);
        PowerMock.mockStatic(Resources.class);

        PowerMock.expectNew(SqlSessionFactoryBuilder.class).andReturn(mockedSqlSessionFactoryBuilder);
        EasyMock.expect(Resources.getResourceAsReader("mybatis/mybatis-config.xml")).andReturn(mockedReader);
        EasyMock.expect(mockedSqlSessionFactoryBuilder.build(mockedReader)).andReturn(mockedSessionFactory);

        PowerMock.replayAll();
        assertThat(RESULT0).isEqualTo((new CallHandler()).handleRequest(new Call()));
        PowerMock.verifyAll();
    }
}