PowerMock-無法將類org.powermock.api.mockito.internal.mockmaker.PowerMockMaker轉換為接口org.mockito.plugins.MockMaker

Question

使用TestNg + PowerMock + Mockito時出現java.lang.ExceptionInInitializerError：

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

問題的根源是：

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

我的依賴樹：

[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

測試類別：

@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

我完全迷失了這個錯誤，感謝您的幫助。

Answer 1

您不應該將MockitoAnnotations.initMocks與TestNG一起使用。

Javadoc表示將其用於JUnit（我認為MockitoJUnitRunner / MockitoRule是更好的方法），但不適用於TestNG。

順便說一句，當您使用TestNG時， PowerMockTestCase等同於MockitoJUnitRunner 。 因此，只需刪除該行即可。