Spring Boot JUnit 5测试失败，指针为空

Question

我得到了

java.lang.nosuchmethoderror：org.junit.jupiter.api.extension.extensioncontext.getRequiredTestInstances（）log/junit/jupiter/api/extension/TestInstances；在org.mockito.junit.jupiter.mockitoExtension.Beforeach（mockitoExtension.java:143)在org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$null$0(TestMethodTestDescriptor.java:126)在org.junit.jupiter.engine.execution.throwablecollector.execute（throwablecollector.java:40)

以下代码出错。

运行下面的代码作为junit测试的正确方式是什么？

package com.safnas.unittesting.unittesting.business;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.mockito.Mockito.when;

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;

import com.safnas.unittesting.unittesting.data.SomeDataService;

@ExtendWith(MockitoExtension.class)
class SomeBusinessMockTest {
    
    @InjectMocks
    SomeBusinessImpl business = new SomeBusinessImpl();
    
    @Mock
    SomeDataService dataServiceMock;
    
    @Test
    void calculateSumUsingDataService_basic() {
        when(dataServiceMock.retrieveAllData()).thenReturn(new int[] {1,2,3});
        assertEquals(6, business.calculateSumUsingDataService());
    }
    
    @Test
    void calculateSum_empty() {
        when(dataServiceMock.retrieveAllData()).thenReturn(new int[] {});
        assertEquals(0, business.calculateSumUsingDataService());
    }
    
    @Test
    void calculateSum_oneValue() {
        when(dataServiceMock.retrieveAllData()).thenReturn(new int[] {5});
        assertEquals(5, business.calculateSumUsingDataService());
    }

}

Answer 1

我删除了@ExtendWith(MockitoExtension.class)，并在下面使用

@在每个之前

void beforeEach() {

MockitoAnnotations.openMocks(this);

}

它工作得很好

按照javadocs

自动关闭org.mockito.mockitoAnnotations.OpenMocks（对象testClass）

为给定的TestClass初始化用Mockito注释注释的对象:@org.Mockito.mock,@spy,@captor,@injectmocks