You can open this sample inside an IDE using the IntelliJ’s Gradle import.

This is an extension of this sample that adds blackbox integration tests.

Here, we add an additional source set integrationTest with a

└── integrationTest
    └── java

We effectively declare a second module that is only used for testing. The module is open, which means that it allows reflective access to its classes at runtime as required by JUnit’s test execution engine.

open module org.gradle.sample.integtest.utilities {
    requires org.gradle.sample.utilities;
    requires org.junit.jupiter.api;
This sample does not work in Eclipse when imported using Eclipse Buildship. This is due to a limitation in Eclipse that does not allow more than one module in one project. It you want to do blackbox testing in Eclipse, you should move the integration tests to separate subprojects.