1.POM 引入以下依赖

      <dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.13.2</version><scope>test</scope></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><version>2.5.2</version><scope>test</scope></dependency>

2.Service层接口单元测试示例

package xxx.xxx.xxx;import org.apache.commons.collections.CollectionUtils;
import org.junit.Assert;
import org.junit.Before;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.runner.RunWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.MockitoAnnotations;
import org.mockito.junit.MockitoJUnitRunner;
import org.springframework.beans.factory.annotation.Autowired;
import java.util.Arrays;@RunWith(MockitoJUnitRunner.class)
@Slf4j
class CommonServiceImplTest {@Autowired@InjectMocksCommonServiceImpl commonService;@MockServiceA  serviceA;@MockServiceB  servieB;private QueryBo queryBO;@BeforeEachpublic void setUp() {MockitoAnnotations.openMocks(this);}@Testvoid getSourceCodeMap() {queryBO = new QueryBO();queryBO.setFieldA("A");queryBO.setFieldB("B"); CommonEntity entity = new CommonEntity ();entity.setField1("1");entity.setField2("2");Mockito.when(serviceA.list(queryBO)).thenReturn(Arrays.asList(new CommonEntity []{entity}));Assert.assertNotNull(commonService.getSourceCodeMap());}

CommonServiceImpl 在方法getSourceCodeMap()调用了ServiceA的方法list(QueryBO queryBo)。