为什么不工作 Jacoco？我希望我做的一切都是对的

Question

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为什么不显示 Jacoco 统计信息？组装过程中出现警告

Skipping JaCoCo execution due to missing execution data file.

Answer 1

在your project

            <plugin>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.22.1</version>
                <configuration>
                    <argLine>--enable-preview</argLine>
                </configuration>
            </plugin>

而与此处的许多其他问题类似，例如“Jacoco doesn't produce coverage reports" and quoting JaCoCo documentation:

If your project already defines VM arguments for test execution, be sure that they will include property defined by JaCoCo.

One of the ways to do this in case of maven-surefire-plugin - is to use syntax for late property evaluation:

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-surefire-plugin</artifactId>
  <configuration>
    <argLine>@{argLine} -your -extra -arguments</argLine>
  </configuration>
</plugin>

Another way is to define "argLine" as a Maven property rather than as part of the configuration of maven-surefire-plugin:

<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>