编写spring应用

测试类自动注入失败：@RunWith(SpringRunner.class)详解

Ctrl+Alt+Delete键，打开任务管理器，结束占据8080端口的Tomcat进程。

HomeController.java

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Taco Cloud</title>
</head>
<body><h1>Welcome to ...</h1><img th:src="@{/images/TacoCloud.png}"/>
</body>
</html>

home.html

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Taco Cloud</title>
</head>
<body><h1>Welcome to ...</h1><img th:src="@{/images/TacoCloud.png}"/>
</body>
</html>

HomeControllerTest.java

package tacos;import static org.hamcrest.Matchers.containsString;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.view;import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.test.web.servlet.MockMvc;@RunWith(SpringRunner.class)@WebMvcTest(HomeController.class)
public class HomeControllerTest {@Autowiredprivate MockMvc mockMvc;    //注入MockMvc@Testpublic void testHomePage() throws Exception{mockMvc.perform(get("/"))    //发起对“/”的get.andExpect(status().isOk()) //期望得到HTTP200.andExpect(view().name("home"))  //期望得到home视图.andExpect(content().string(    //期望包含welcome to...containsString("Welcome to ...")));}}

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.4.3</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>sia</groupId><artifactId>taco-cloud</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><!--打包为jar  --><name>taco-cloud</name><description>taco-cloud project for Spring Boot</description><properties><java.version>11</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-thymeleaf</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-devtools</artifactId><scope>runtime</scope><optional>true</optional></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>org.seleniumhq.selenium</groupId><artifactId>selenium-java</artifactId><scope>test</scope></dependency><dependency><groupId>org.seleniumhq.selenium</groupId><artifactId>htmlunit-driver</artifactId><scope>test</scope></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.10</version><!--<scope>test</scope>--></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

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