Difference between junit-jupiter-api and junit-jupiter-engine

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junit-jupiter aggregator artifact

JUnit 5.4 provides much simpler Maven configuration if your intent is to write JUnit 5 tests. Simply specify the aggregate artifact named junit-jupiter.

<!-- https://mvnrepository.com/artifact/org.junit.jupiter/junit-jupiter -->
<dependency>
    <groupId>org.junit.jupiter</groupId>
    <artifactId>junit-jupiter</artifactId>
    <version>5.9.1</version>
    <scope>test</scope>
</dependency>

As an aggregate, this artifact in turn pulls the following three artifacts automatically, for your convenience:

In your project, you will also end up with:

  • junit-platform-commons-1.4.0.jar
  • junit-platform-engine-1.4.0.jar

The above is what you need to write and run JUnit 5 tests based on the new Jupiter paradigm.

Legacy tests

If your project has JUnit 3 or 4 tests that you want to continue to run, add another dependency for the JUnit Vintage Engine, junit-vintage-engine. See tutorial by IBM.

<!-- https://mvnrepository.com/artifact/org.junit.vintage/junit-vintage-engine -->
<dependency>
    <groupId>org.junit.vintage</groupId>
    <artifactId>junit-vintage-engine</artifactId>
    <version>5.9.1</version>
    <scope>test</scope>
</dependency>

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