maven jacoco：不生成代码覆盖率报告

Question

我正在尝试为我的项目的代码覆盖设置 jacoco

我的项目基于 Java 1.8

这是我的项目中的样子 pom.xml

     <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 并看到以下内容

$ 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 我明白了

$ 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] ------------------------------------------------------------------------

然后我看看 target/site/jacoco/index.html 并看到以下内容

问题

- 配置中有什么不正确的地方？

- 如何生成报告？

谢谢

原文由 daydreamer 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

您使用过时版本的 JaCoCo 插件有什么特别的原因吗？对于 Java 8 支持，您必须至少使用 0.7.0 版（请参阅 变更日志）。

在您的配置中，报告目标绑定到验证阶段，因此运行 mvn test 不会生成任何报告，因为它不运行验证阶段（ 测试阶段在验证之前）。您必须使用 mvn verify 来执行测试并生成报告。

JaCoCo 项目提供示例 Maven 配置。您可以尝试“ 此 JAR 项目的 POM 文件在代码覆盖率下运行 JUnit 测试并创建覆盖率报告”。

原文由 Kolargol00 发布，翻译遵循 CC BY-SA 3.0 许可协议

Answer 2

JaCoco Maven 插件正在覆盖 Surefire argLine，如果您还需要覆盖 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 中所述。

原文由 Pierrick HYMBERT 发布，翻译遵循 CC BY-SA 3.0 许可协议