单元测试Junit Test 中 Assertions 使用 Java版

业务场景描述：盘库操作中需要使用具备有效期限的动态码登录系统，接下来是结合动态码更新API 的单元测试，讲解Assertions 的常规用法。

项目采用 Spring Boot + Gradle 集成，下面使用gradle 语法引入依赖：

testCompile group: 'org.springframework.boot', name: 'spring-boot-starter-test', version: '2.1.2.RELEASE'

testCompile group: 'org.assertj', name: 'assertj-core', version: '3.11.1'

Jar依赖可访问 maven repository 查找和选取。点击 Jar 依赖查找明细，可看到其支持多种集成工具，如maven,gradle,ant等

import com.fasterxml.jackson.databind.JsonNode;
import org.assertj.core.api.Assertions;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.http.MediaType;
import org.springframework.test.context.jdbc.Sql;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.test.context.web.WebAppConfiguration;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
import org.springframework.test.web.servlet.result.MockMvcResultHandlers;
import org.springframework.test.web.servlet.result.MockMvcResultMatchers;
import org.springframework.transaction.annotation.Transactional;

import static net.javacrumbs.jsonunit.fluent.JsonFluentAssert.assertThatJson;

/**
 * @Description 更新动态码
 * @Author blake
 * @Date 2019-01-22 11:32
 * @Version 1.0
 */
@RunWith(SpringRunner.class)
@WebAppConfiguration
@SpringBootTest
@Transactional
@Sql("classpath:/sql/admin/dynamicCode/updateDynamicCodeTests.sql")
public class UpdateDynamicCodeTests extends BaseDynamicCodeControllerTests {

    @Autowired
    private DynamicCodeService dynamicCodeService;

    /**
     * 动态码更新-正常态
     */
    @Test
    public void updateDynamicCodeSuccessfully() throws Exception {

        Long id = LongUtil.toLong(1);
        // 更新前的动态码信息
        DynamicCodeResponse originalDynamicCode = dynamicCodeService.getDynamicCodeInfo(id);

        String responseContent = mMockMvc.perform(
                MockMvcRequestBuilders.put(BASE_HOST + "/api/admin/dynamic/code/" + id)
                        .contentType(MediaType.APPLICATION_JSON_UTF8)
                        .sessionAttr(AUTHORIZED_ATTRIBUTE_NAME, getAuthSession()))
                .andExpect(MockMvcResultMatchers.status().isOk())
                .andDo(MockMvcResultHandlers.print())
                .andReturn().getResponse().getContentAsString();

        prettyPrintJson(responseContent);

        //assert  response
        JsonNode jsonNode = mObjectMapper.readTree(responseContent);

        // 更新成功后的动态码信息
        DynamicCodeResponse dynamicCode = jsonNode.get("data").traverse(mObjectMapper).readValueAs(DynamicCodeResponse.class);

        assertThatJson(responseContent).node("code").isEqualTo(0);
        assertThatJson(responseContent).node("data").isNotEqualTo(null);
        assertThatJson(responseContent).node("message").isEqualTo("");
        assertThatJson(responseContent).node("status").isStringEqualTo("success");

        Assertions.assertThat(originalDynamicCode).isNotEqualTo(null);
        Assertions.assertThat(dynamicCode).isNotEqualTo(originalDynamicCode);
        Assertions.assertThat(dynamicCode.getActive()).isEqualTo(originalDynamicCode.getActive());
        Assertions.assertThat(dynamicCode.getPlanId()).isEqualTo(originalDynamicCode.getPlanId());
        Assertions.assertThat(dynamicCode.getCode()).isNotEqualTo(originalDynamicCode.getCode());

        Assertions.assertThat(dynamicCode.getIsSub()).isEqualTo(originalDynamicCode.getIsSub());
        Assertions.assertThat(dynamicCode.getId()).isEqualTo(originalDynamicCode.getId());
    }

}

接下来解释下测试类上标注的5个注解的作用：

@RunWith(SpringRunner.class) 表明单元测试运行借助于SpringRunner 驱动器
@WebAppConfiguration 表明这是一个Web类型的单元测试，即Controller级别的Tests
@SpringBootTest 表明这是一个Spring Boot 项目的单元测试
@Transactional 事务回滚
@Sql("classpath:/sql/admin/dynamicCode/updateDynamicCodeTests.sql") 单元测试的数据准备，建议每个table的insert操作前，都使用 truncate table tableName; 将数据清空，以免发生主键冲突等状况。建议连接本地MySQL数据库进行单元测试！

单元测试Junit Test 中 Assertions 使用 Java版

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