java - PowerMock - 无法将类 org.powermock.api.mockito.internal.mockmaker.PowerMockMaker 强制转换为接口(interface) org.mockito.plugins.MockMaker

Question

使用 TestNg + PowerMock + Mockito 时遇到 java.lang.ExceptionInInitializerError:

Caused by: java.lang.NullPointerException
at org.mockito.internal.configuration.plugins.Plugins.getStackTraceCleanerProvider(Plugins.java:17)

问题的根源是:

java.lang.ClassCastException: Cannot cast class org.powermock.api.mockito.internal.mockmaker.PowerMockMaker to interface org.mockito.plugins.MockMaker

我的依赖树:

[INFO] +- org.powermock:powermock-api-mockito:jar:1.6.2:test
[INFO] |  +- org.mockito:mockito-all:jar:1.10.19:test
[INFO] |  \- org.powermock:powermock-api-support:jar:1.6.2:test
[INFO] |     \- org.powermock:powermock-reflect:jar:1.6.2:test
[INFO] |        \- org.objenesis:objenesis:jar:2.1:test
[INFO] +- org.powermock:powermock-module-testng:jar:1.6.2:test
[INFO] |  +- org.powermock:powermock-core:jar:1.6.2:test
[INFO] |  |  \- org.javassist:javassist:jar:3.19.0-GA:test
[INFO] |  \- org.powermock:powermock-module-testng-common:jar:1.6.2:test

测试类:

@PrepareForTest({CrossSiteServletRequestFilter.class})
@PowerMockIgnore({"org.apache.log4j.*"})
@Test
public class CrossSiteServletRequestFilterTest extends PowerMockTestCase{
    @Mock
    private HttpServletRequest request;

    @BeforeSuite
    public void beforeSuite() {
        URL log4jCfg = CrossSiteServletRequestFilterTest.class.getClassLoader().getResource("log/log4j.xml");
        DOMConfigurator.configure(log4jCfg);
        MockitoAnnotations.initMocks(this); //<---It crashes here

我完全迷失了这个错误，感谢您的帮助。

Answer 1

您不应该将 MockitoAnnotations.initMocks 与 TestNG 一起使用。

Javadoc据说将其用于 JUnit(我认为 MockitoJUnitRunner/MockitoRule 是更好的方法)，但不适用于 TestNG。

顺便说一句，当您使用 TestNG 时，PowerMockTestCase 相当于 MockitoJUnitRunner。因此，只需删除该行即可正常工作。