无法运行jacoco代码覆盖率工具

Question

我有一个maven项目（link），我想在上面运行代码覆盖率。

我在主项目pom文件上运行了命令mvn test-Pcoverage jacoco:prepare agent jacoco:report，但没有生成报告。相反，我得到的警告是

[INFO] --- jacoco-maven-plugin:0.7.7.201606060606:report (post-test) @ pulsar-discovery-service ---
[INFO] Skipping JaCoCo execution due to missing execution data file.
[INFO] 
[INFO] --- jacoco-maven-plugin:0.7.7.201606060606:prepare-agent (default-cli) @ pulsar-discovery-service ---
[INFO] argLine set to -javaagent:/home/jai1/.m2/repository/org/jacoco/org.jacoco.agent/0.7.7.201606060606/org.jacoco.agent-0.7.7.201606060606-runtime.jar=destfile=/home/jai1/pulsar/pulsar-discovery-service/target/jacoco.exec
[INFO] 
[INFO] --- jacoco-maven-plugin:0.7.7.201606060606:report (default-cli) @ pulsar-discovery-service ---
[INFO] Skipping JaCoCo execution due to missing execution data file.

有人能建议我如何用这个pom文件生成代码覆盖率报告吗。我正在使用apache-maven-3.3。9和testNG。

Answer 1

It seems like you are missing below line in pom.xml 
<destFile>
   ${project.build.directory}/coverage-reports/jacoco-unit.exec
</destFile>

 <plugin>
           <groupId>org.jacoco</groupId>
           <artifactId>jacoco-maven-plugin</artifactId>
           <version>0.7.1.201405082137</version>
            <executions>
                  <execution>
                      <id>prepare-jacoco-4-unit-tests</id>
                      <goals>
                           <goal>prepare-agent</goal>
                      </goals>
                      <configuration>
          <!-- Sets the path to the file which contains the execution data. -->
         <destFile>
             ${project.build.directory}/coverage-reports/jacoco-unit.exec
         </destFile>                                             
         <propertyName>jacocoArgLine</propertyName>
         </configuration>
         </execution>

            <execution>
                <id>create-jacoco-reports-4-unit-tests</id>
                <phase>prepare-package</phase>
                <goals>
                    <goal>report</goal>
                </goals>
               <configuration>
           <!-- Sets the path to the file which contains the execution data. -->
          <dataFile>
              ${project.build.directory}/coverage-reports/jacoco-unit.exec
          </dataFile>
          </configuration>
          </execution>
  </executions>
  </plugin>

然后在maven surefire插件中，应定义以下内容：

<plugin>
     <groupId>org.apache.maven.plugins</groupId>
     <artifactId>maven-surefire-plugin</artifactId>
     <version>2.17</version>
     <configuration>
         <skipTests>${skipUnitTests}</skipTests>
         <argLine>${jacocoArgLine}</argLine>
     </configuration>
</plugin>

Answer 2

以下是对我们有效的方法：

设置一些属性：

<properties>
    ...
    <!-- versions below are last ones that are Java 6 compatible -->
    <version.jacoco-agent>0.7.4.201502262128</version.jacoco-agent>
    <jacocoArgLine />
    <surefire.base.argLine>-XX:-UseSplitVerifier -XX:MaxPermSize=384m -Xmx1024m -Djava.awt.headless=true</surefire.base.argLine>
    ...
</properties>

以及覆盖范围配置文件：

    <profile>
        <id>coverage</id>
        <build>
            <pluginManagement>
                <plugins>
                    <plugin>
                        <groupId>org.apache.maven.plugins</groupId>
                        <artifactId>maven-surefire-plugin</artifactId>
                        <version>${surefire.plugin.version}</version>
                        <configuration>
                            <argLine>${surefire.base.argLine} @{jacocoArgLine}</argLine>
                            <systemPropertyVariables>
                                <java.awt.headless>true</java.awt.headless>
                            </systemPropertyVariables>
                        </configuration>
                    </plugin>
                </plugins>
            </pluginManagement>
            <plugins>
                <plugin>
                    <groupId>org.jacoco</groupId>
                    <artifactId>jacoco-maven-plugin</artifactId>
                    <executions>
                        <execution>
                            <goals>
                                <goal>prepare-agent</goal>
                                <goal>report</goal>
                            </goals>
                        </execution>
                    </executions>
                </plugin>
            </plugins>
        </build>
    </profile>

Answer 3

你的pom。xml包含

  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-surefire-plugin</artifactId>
    <version>2.19.1</version>
    <configuration>
      <argLine> -Xmx2G -XX:MaxDirectMemorySize=8G
        -Dio.netty.leakDetectionLevel=advanced</argLine>
    </configuration>
  </plugin>

而JaCoCo留档为准备代理目标状态

如果您的项目已经为测试执行定义了VM参数，请确保它们将包括由JaCoCo定义的属性。

... 将“argLine”定义为Maven属性，而不是Maven surefire插件配置的一部分：

  <properties>
    <argLine>-your -extra -arguments</argLine>
  </properties>
  ...
  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-surefire-plugin</artifactId>
    <configuration>
      <!-- no argLine here -->
    </configuration>
  </plugin>