java - NoSuchMethodError : org. mockito.internal.runners.RunnerFactory.createStrict

Question

我正在使用最新版本的 JUnitParams、junit 和 mockito-all。

testCompile group: 'pl.pragmatists', name: 'JUnitParams', version: '1.1.1'
testCompile group: 'junit', name: 'junit', version: '4.12'
testCompile group: 'org.mockito', name: 'mockito-all', version: '2.0.2-beta'

使用注释 @RunWith(MockitoJUnitRunner.class) 运行 JUnit 测试时，我不断收到 NoSuchMethodError。

java.lang.NoSuchMethodError: org.mockito.internal.runners.RunnerFactory.createStrict(Ljava/lang/Class;)Lorg/mockito/internal/runners/InternalRunner;

    at org.mockito.junit.MockitoJUnitRunner.<init>(MockitoJUnitRunner.java:154)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:104)
    at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:86)
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
    at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
    at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:33)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:49)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

什么问题可能会触发 NoSuchMethodError 异常？

代码:

@RunWith(MockitoJUnitRunner.class)
public class MockTest {

    @Mock
    ServletUriComponentsBuilder servletUriComponentsBuilder;

    @Before
    public void setup() {
        servletUriComponentsBuilder = mock(ServletUriComponentsBuilder.class);
    }

    @Test
    public void shouldGenerateUrl() {
        when(servletUriComponentsBuilder.fromUriString(anyString()).build().toString())
                .thenReturn("test");

        Assert.assertEquals("my message", "test", "test");
    }

}

Answer 1

mockito-core

您的类路径上有 Mockito 1.x 和 2.x。我认为这是因为您依赖于 mockito-all:2.0.2-beta 并且您的一些其他依赖项具有对 mockito-core:1.x 的传递依赖。

您永远不应该将 mockito-all 与进行依赖项管理的构建系统一起使用。而是使用

testCompile group: 'org.mockito', name: 'mockito-core', version: '2.0.2-beta'

甚至是更新的版本(请参阅 The Central Repository )

Mockito 文档:https://github.com/mockito/mockito/wiki/Declaring-mockito-dependency

如果这不能解决问题，请告诉我。

创建模拟

这不是问题的原因，但可能也有帮助。您将创建 ServletUriComponentsBuilder 两次。首先，MockitoRunner 由于 @Mock 注释而创建它，然后您在 setup 方法中使用新的模拟覆盖它。所以要么你这样做

@RunWith(MockitoJUnitRunner.class)
public class MockTest {

    @Mock
    ServletUriComponentsBuilder servletUriComponentsBuilder;

    @Test
    ...

或者你这样做

public class MockTest {

    ServletUriComponentsBuilder servletUriComponentsBuilder;

    @Before
    public void setup() {
        servletUriComponentsBuilder = mock(ServletUriComponentsBuilder.class);
    }

    @Test
    ...

你甚至可以做得更短

public class MockTest {

    ServletUriComponentsBuilder servletUriComponentsBuilder
         = mock(ServletUriComponentsBuilder.class);

    @Test
    ...