Maven 多模块项目的 Jacoco 报告

Question

我有一个 Maven 多模块项目，我使用网站上的 jacoco 示例配置来创建代码覆盖率报告：(http://eclemma.org/jacoco/trunk/doc/examples/build/pom.xml)

所以我的 pom 看起来像这样：

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
    <groupId>com.dti</groupId>
    <artifactId>dti-parent</artifactId>
    <version>1.0.1</version>
</parent>
<groupId>com.dti.myproject</groupId>
<artifactId>myproject-build-all</artifactId>
<version>6.5.0.0-SNAPSHOT</version>
<packaging>pom</packaging>
<name>myproject</name>
<modules>
    <module>../myproject-config</module>
    <module>../myproject-messages</module>
    <module>../myproject-persistence</module>
    <module>../myproject-resources</module>
    <module>../myproject-service</module>
</modules>
<build>
    <plugins>
        <plugin>
            <groupId>org.jacoco</groupId>
            <artifactId>jacoco-maven-plugin</artifactId>
            <version>0.7.7-SNAPSHOT</version>
            <executions>
                <execution>
                    <id>default-prepare-agent</id>
                    <goals>
                        <goal>prepare-agent</goal>
                    </goals>
                </execution>
                <execution>
                    <id>default-report</id>
                    <phase>prepare-package</phase>
                    <goals>
                        <goal>report</goal>
                    </goals>
                </execution>
                <execution>
                    <id>default-check</id>
                    <goals>
                        <goal>check</goal>
                    </goals>
                    <configuration>
                        <rules>
                            <!--  implementation is needed only for Maven 2  -->
                            <rule implementation="org.jacoco.maven.RuleConfiguration">
                                <element>BUNDLE</element>
                                <limits>
                                    <!--  implementation is needed only for Maven 2  -->
                                    <limit implementation="org.jacoco.report.check.Limit">
                                        <counter>COMPLEXITY</counter>
                                        <value>COVEREDRATIO</value>
                                        <minimum>0.0</minimum>
                                    </limit>
                                </limits>
                            </rule>
                        </rules>
                    </configuration>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>
</project>

当我执行 mvn:test 时，肯定会在模块中生成报告，它们看起来很好。但是，当我运行 mvn:verify 时，jacoco 不会创建报告并且控制台输出显示：

[INFO] --- jacoco-maven-plugin:0.7.7-SNAPSHOT:report (default-report) @ myproject-build-all ---
[INFO] Skipping JaCoCo execution due to missing execution data file.
[INFO]
[INFO] --- jacoco-maven-plugin:0.7.7-SNAPSHOT:check (default-check) @ myproject-build-all ---
[INFO] Skipping JaCoCo execution due to missing execution data file:C:\workspaces\release-trunk\myproject-build-all\target\jacoco.exec

有人知道如何解决这个错误吗？

Answer 1

1. 将 jacoco 报告执行 <phase>prepare-package</phase> 更改为 <phase>test</phase> 以便 mvn:test 生成 jacoco 报告（而不仅仅是肯定报告）。
2. 为 jacoco prepare-agent 执行添加属性名称

<execution>
    <id>default-prepare-agent</id>
    <goals>
        <goal>prepare-agent</goal>
    </goals>
    <configuration>
        <propertyName>jacoco.agent.ut.arg</propertyName>
    </configuration>
</execution>

1. 声明surefire（作为构建）插件并将jacoco.agent.ut.arg添加为argline：

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-surefire-plugin</artifactId>
    <configuration>
        <argLine>${jacoco.agent.ut.arg}</argLine>
    </configuration>
</plugin>

4. 如果您没有任何集成测试，请避免使用 mvn:verify 目标。如果您确实有集成测试，您应该使用 failsafe 插件 (http://maven.apache.org/surefire/maven-failsafe-plugin/) 而不是 surefire 运行它们。此外，建议为单元测试和集成测试设置单独的 jacoco 执行目标 (http://www.petrikainulainen.net/programming/maven/creating-code-coverage-reports-for-unit-and-integration-tests-with-the-jacoco-maven-plugin/)