如何从测试 jar 运行所有单元测试？

Question

I ran the following command to produce a test-jar: mvn jar:test-jar .

What's the mvn command to execute all unit-tests?

Answer 1

When you're creating a jar containing test-classes, you would probably want to reuse those classes. For example, some common test fixtures or abstract base classes, and so on.

In other words, when you run mvn jar:test-jar , you create new artifact, which you can add as dependency in other maven project or module:

  <dependencies>
    <dependency>
      <groupId>groupId</groupId>
      <artifactId>artifactId</artifactId>
      <classifier>tests</classifier> <!-- note the classifier -->
      <type>test-jar</type> <!-- note the type -->
      <version>version</version>
      <scope>test</scope>
    </dependency>
  </dependencies>

Note: that such approach is not the preferred way, since test-jar will loose transitive test-scoped dependencies

So, returning to the original question: you don't create test-jar to run tests, you create it to reuse test classes between projects or modules (by means of adding dependency ).

To run tests you'll simply use standard Maven command:

mvn clean test