Maven Jacoco：无法生成代码覆盖率报告。

Question

我正在尝试为我的项目设置jacoco，以便进行代码覆盖率测试。

我的项目基于Java 1.8。

以下是我项目的pom.xml文件内容。

    <plugin>
        <groupId>org.jacoco</groupId>
        <artifactId>jacoco-maven-plugin</artifactId>
        <version>0.5.10.201208310627</version>
        <configuration>
            <output>file</output>
            <append>true</append>
        </configuration>
        <executions>
            <execution>
                <id>jacoco-initialize</id>
                <goals>
                    <goal>prepare-agent</goal>
                </goals>
            </execution>
            <execution>
                <id>jacoco-site</id>
                <phase>verify</phase>
                <goals>
                    <goal>report</goal>
                </goals>
            </execution>
        </executions>
    </plugin>  

然后我运行 mvn test 命令，看到以下内容：

$ mvn test
[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building pennyapp 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- jacoco-maven-plugin:0.5.10.201208310627:prepare-agent (jacoco-initialize) @ pennyapp ---
[INFO] argLine set to -javaagent:/Users/harit/.m2/repository/org/jacoco/org.jacoco.agent/0.5.10.201208310627/org.jacoco.agent-0.5.10.201208310627-runtime.jar=destfile=/Users/harit/code/idea/pennyapp/target/jacoco.exec,append=true,output=file
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ pennyapp ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 1 resource
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ pennyapp ---
[INFO] Changes detected - recompiling the module!
[WARNING] File encoding has not been set, using platform encoding UTF-8, i.e. build is platform dependent!
[INFO] Compiling 1 source file to /Users/harit/code/idea/pennyapp/target/classes
[INFO] 
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ pennyapp ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory /Users/harit/code/idea/pennyapp/src/test/resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ pennyapp ---
[INFO] Changes detected - recompiling the module!
[WARNING] File encoding has not been set, using platform encoding UTF-8, i.e. build is platform dependent!
[INFO] Compiling 1 source file to /Users/harit/code/idea/pennyapp/target/test-classes
[INFO] 
[INFO] --- maven-surefire-plugin:2.17:test (default-test) @ pennyapp ---
[INFO] Surefire report directory: /Users/harit/code/idea/pennyapp/shippable/testresults
[INFO] Using configured provider org.apache.maven.surefire.junit4.JUnit4Provider

-------------------------------------------------------
 T E S T S
-------------------------------------------------------
objc[13225]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.8.0_05.jdk/Contents/Home/jre/bin/java and /Library/Java/JavaVirtualMachines/jdk1.8.0_05.jdk/Contents/Home/jre/lib/libinstrument.dylib. One of the two will be used. Which one is undefined.
Running HelloTest
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.1 sec - in HelloTest

Results :

Tests run: 1, Failures: 0, Errors: 0, Skipped: 0

[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 4.523 s
[INFO] Finished at: 2014-08-19T17:56:33-07:00
[INFO] Final Memory: 10M/119M
[INFO] ------------------------------------------------------------------------

然后我运行mvn jacoco:report，然后我看到：

$ mvn jacoco:report
[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building pennyapp 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- jacoco-maven-plugin:0.5.10.201208310627:report (default-cli) @ pennyapp ---
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.176 s
[INFO] Finished at: 2014-08-19T17:56:51-07:00
[INFO] Final Memory: 11M/112M
[INFO] ------------------------------------------------------------------------

然后我查看target/site/jacoco/index.html并看到以下内容

问题
- 配置有什么不正确的地方？
- 我该如何生成报告？

谢谢

- daydreamer

---

你使用JaCoCo插件过时的版本有什么特别原因吗？为了支持Java 8，你必须至少使用0.7.0版本（参见[changelog]（http://www.eclemma.org/jacoco/trunk/doc/changes.html））。 - Kolargol00

运行旧版本的 jacoco 是个问题。现在已经修复了。 - daydreamer

Answer 1

你使用JaCoCo插件的过时版本有什么特别的原因吗？为了支持Java 8，在配置中至少需要使用版本0.7.0（请参见更改日志）。

在你的配置中，报告目标绑定到验证阶段，所以运行mvn test不会生成任何报告，因为它不会运行验证阶段（测试阶段在验证之前）。你必须使用mvn verify来执行测试和生成报告。

JaCoCo项目提供了示例Maven配置。你可以尝试使用“此POM文件用于在代码覆盖率下运行JUnit测试并创建覆盖率报告的JAR项目”。

- Kolargol00

---

我之前使用的是 mvn test。但当我改用 mvn verify 时，它就可以正常工作了。 - Ravi Wadje

Answer 2

JaCoco Maven插件会覆盖Surefire的argLine参数，如果您也需要覆盖argLine，请确保保留argLine变量：

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-surefire-plugin</artifactId>
  <version>2.19.1</version>
  <configuration>
    <argLine>-Xmx1024M ${argLine}</argLine> 
  </configuration>
</plugin>

请注意，您可以更改此属性名称，如jacoco插件文档中描述的那样。

Note: You can change this property name, as described in the jacoco plugin documentation.

- Pierrick HYMBERT

Answer 3

我遇到了同样的问题。 问题在于我将jacoco插件添加到了<pluginManagment>标签内部列出的<plugins>中。

  <build>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
       ...
        <plugin>
        <groupId>org.jacoco</groupId>
        <artifactId>jacoco-maven-plugin</artifactId>
        <version>0.8.4</version>
        <executions>
          <execution>
            <id>default-prepare-agent</id>
            <goals>
              <goal>prepare-agent</goal>
            </goals>
          </execution>
          <execution>
            <id>jacoco-report</id>
            <phase>test</phase>
            <goals>
              <goal>report</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
...
       
      </plugins>
    </pluginManagement>

在将<plugins>作为<build>的直接子节点后，一切都运行正常。

<build>
....
 <plugins>
      <plugin>
        <groupId>org.jacoco</groupId>
        <artifactId>jacoco-maven-plugin</artifactId>
        <version>0.8.4</version>
        <executions>
          <execution>
            <id>default-prepare-agent</id>
            <goals>
              <goal>prepare-agent</goal>
            </goals>
          </execution>
          <execution>
            <id>jacoco-report</id>
            <phase>test</phase>
            <goals>
              <goal>report</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
...
<build>

- Ornelio Chauque

---

这很奇怪，但是帮我省了很多事。 - laksys

很高兴听到这个消息，@laksys。 - Ornelio Chauque

这是我的问题，谢谢！ - Frederick Haug

Answer 4

这对我有用：

这对我有用：

mvn clean install
mvn site

尽管未达到最低代码覆盖率且 mvn clean install 失败，但 mvn site 构建成功，并在以下位置创建了覆盖率报告：

.../target/site/jacoco/index.html

- Bohemian

Answer 5

以下方法对我来说没有任何问题

<plugin>
   <groupId>org.jacoco</groupId>
    <artifactId>jacoco-maven-plugin</artifactId>
    <version>0.8.4</version>
    <executions>
        <execution>
            <id>default-prepare-agent</id>
            <goals>
                <goal>prepare-agent</goal>
            </goals>
        </execution>
        <execution>
            <id>jacoco-report</id>
            <phase>test</phase>
            <goals>
                <goal>report</goal>
            </goals>                   
        </execution>
    </executions>
</plugin>

注意：phase是“test”，以便在执行测试后生成报告。

- user2739602

---

在执行 mvn clean install 后添加 <phase>test</phase>，生成站点路径。谢谢。 - Shakirov Ramil

对我而言，“<phase>test</phase>” 是关键。运行“mvn test”时，现在会生成站点文件夹。 - BabyishTank

Answer 6

我遇到了类似的问题，不知道根本原因是什么，但通过避免内置功能，解决了问题。

<pluginManagement>

以下是适合我的POM文件

    <?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>com.example</groupId>
        <artifactId>SampleSpring</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <packaging>war</packaging>
        <name>SampleSpring</name>
        <description>Demo project for SampleSpring</description>
        <properties>
            <java.version>1.8</java.version>
            <maven.compiler.source>1.8</maven.compiler.source>
            <maven.compiler.target>1.8</maven.compiler.target>
            <start-class>com.example.spring.SampleSpringApplication</start-class>

            <jacoco.version>0.8.3</jacoco.version>
            <sonar.java.coveragePlugin>jacoco</sonar.java.coveragePlugin>
            <sonar.dynamicAnalysis>reuseReports</sonar.dynamicAnalysis>
            <sonar.jacoco.reportPath>${project.basedir}/../target/jacoco.exec</sonar.jacoco.reportPath>
            <sonar.language>java</sonar.language>

        </properties>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>

            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-tomcat</artifactId>
                <scope>provided</scope>
            </dependency>

            <!-- Testing -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
                    <exclusions>
                        <exclusion>
                            <groupId>org.junit.vintage</groupId>
                            <artifactId>junit-vintage-engine</artifactId>
                        </exclusion>
                    </exclusions>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-test</artifactId>
                <scope>test</scope>
            </dependency>
            <!-- Testing -->


        </dependencies>

        <build>
            <plugins>

                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>

                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-surefire-plugin</artifactId>
                    <version>3.0.0-M1</version>
                </plugin>

                <!--jacoco plugin -->
                <plugin>
                    <groupId>org.jacoco</groupId>
                    <artifactId>jacoco-maven-plugin</artifactId>
                    <version>0.8.5</version>
                    <configuration>
                        <output>file</output>
                        <append>true</append>
                    </configuration>
                    <executions>
                        <execution>
                            <id>jacoco-initialize</id>
                            <goals>
                                <goal>prepare-agent</goal>
                            </goals>
                        </execution>
                        <execution>
                            <id>jacoco-site</id>
                            <phase>verify</phase>
                            <goals>
                                <goal>report</goal>
                            </goals>
                        </execution>
                    </executions>
                </plugin>
                <!--jacoco plugin end -->

                <!--Sonarqube plugin -->
                <plugin>
                    <groupId>org.sonarsource.scanner.maven</groupId>
                    <artifactId>sonar-maven-plugin</artifactId>
                    <version>3.6.0.1398</version>
                </plugin>
                <!--Sonarqube plugin end -->

            </plugins>
        </build>

    </project>

- Parameshwar

Answer 7

在尝试其他解决方法之前，请首先检查IntelliJ IDEA中Maven工具栏上的“切换‘跳过测试’模式”是否处于活动状态。

- Murat Yıldız