当我使用mvn cobertura： cobertura时，为什么我的测试没有运行？

Question

我试图为我的类“Sinus”（用于计算浮点的Sinus）运行一个测试，但当我试图运行这个测试来生成我的Cobertura覆盖率报告时，它不起作用，我真的不知道为什么！你有什么建议或解释吗？（我使用cmd:mvn cobertura:cobertura）

-这是我的测试：

import static org.junit.Assert.*;
import org.junit.Test;


public class SinusTest {

Sinus test = new Sinus();

    @Test
    public static void Sinuszero() {
        Sinus test = new Sinus();
        assertTrue(test.sin(23) == 5);
    }
}

结果是：

[INFO] 
[INFO] --- maven-surefire-plugin:3.0.0-M5:test (default-test) @ 2 ---
[INFO] 
[INFO] -------------------------------------------------------
[INFO]  T E S T S
[INFO] -------------------------------------------------------
[INFO] 
[INFO] Results:
[INFO] 
[INFO] Tests run: 0, Failures: 0, Errors: 0, Skipped: 0
[INFO] 
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  2.193 s
[INFO] Finished at: 2021-05-26T11:07:45+02:00

那有什么问题？有什么想法吗？这是我的pom。xml如下：

<groupId>1</groupId>
<artifactId>2</artifactId>
<version>2</version>
<packaging>jar</packaging>

<name>2</name>
<description>Blank project for Vanilla Spring WebFlux.fn</description>
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.0.RELEASE</version> <!-- lookup parent from repository -->
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
    <start-class>2.App</start-class>
    <spring-fu.version>0.0.3.BUILD-SNAPSHOT</spring-fu.version>
</properties>


<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-webflux</artifactId>
        <exclusions>
            <exclusion>
                <groupId>javax.annotation</groupId>
                <artifactId>javax.annotation-api</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.hibernate.validator</groupId>
                <artifactId>hibernate-validator</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.springframework.fu</groupId>
        <artifactId>spring-fu-jafu</artifactId>
        <version>${spring-fu.version}</version>
    </dependency>
    <dependency>
        <groupId>am.ik.yavi</groupId>
        <artifactId>yavi</artifactId>
        <version>0.0.18</version>
    </dependency>
    <dependency>
        <groupId>org.junit.jupiter</groupId>
        <artifactId>junit-jupiter-api</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.junit.jupiter</groupId>
        <artifactId>junit-jupiter-engine</artifactId>
        <scope>test</scope> 
    </dependency>   
    <dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.11</version>
    <scope>test</scope>

    </dependency>
    <dependency>
        <groupId>io.projectreactor</groupId>
        <artifactId>reactor-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.assertj</groupId>
        <artifactId>assertj-core</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
        
        <plugin>
        <groupId>org.codehaus.mojo</groupId>
         <artifactId>cobertura-maven-plugin</artifactId>
         <version>2.5.1</version>
         <configuration>
         <formats>
            <format>html</format>
            <format>xml</format>
         </formats>
         </configuration>
       </plugin>
       
       <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-surefire-plugin</artifactId>
        <version>3.0.0-M5</version>
       </plugin>
     
    </plugins>
</build>

<repositories>
    <repository>
        <id>spring-snapshots</id>
        <name>Spring Snapshots</name>
        <url>https://repo.spring.io/snapshot</url>
        <snapshots>
        </snapshots>
    </repository>
    <repository>
        <id>spring-milestones</id>
        <name>Spring Milestones</name>
        <url>https://repo.spring.io/milestone</url>
        <snapshots>
            <enabled>false</enabled>
        </snapshots>
    </repository>
</repositories>

<pluginRepositories>
    <pluginRepository>
        <id>spring-snapshots</id>
        <name>Spring Snapshots</name>
        <url>https://repo.spring.io/snapshot</url>
        <snapshots>
        </snapshots>
    </pluginRepository>
    <pluginRepository>
        <id>spring-milestones</id>
        <name>Spring Milestones</name>
        <url>https://repo.spring.io/milestone</url>
        <snapshots>
            <enabled>false</enabled>
        </snapshots>
    </pluginRepository>
</pluginRepositories>

Answer 1

首先，阅读文档。插件的行为并不是一种魔法。https://maven.apache.org/surefire/maven-surefire-plugin/examples/junit-platform.html#Provider_Selection您正在使用JUnit4注释，但POM有两个依赖项：JUnit4和JUnit5。Surefire插件采用首选项并忽略JUnit4 runner。Jupiter的JUnit5运行程序无法理解代码中的JUnit4注释，因此无法找到可执行源代码。您可以使用JUnit5 Vintage dependency而不是JUnit5 Jupiter。

Answer 2

您的测试是基于Junit4-api的。但是从您的pom.xml您有Junit5依赖项。

删除jupiter依赖项应该可以做到这一点。

关于cobertura，当您在java 8上运行时，最好迁移到JaCoCo，因为java版本高于7的cobertura存在缺陷。