FindException: Module org.apiguardian.api not found, required by org.junit.platform.launcher

[Marcono1234]

Description

When using a module-info.java as part of the test sources, Gradle fails executing the tests:

> Task :test FAILED
Error occurred during initialization of boot layer
java.lang.module.FindException: Module org.apiguardian.api not found, required by org.junit.platform.launcher

It appears #2695 tried to solve that issue for 5.8.0, but I am seeing this behavior for 5.8.0 and 5.8.1.
Manually adding testImplementation("org.apiguardian:apiguardian-api:1.1.2") as dependency solves this issue.

Steps to reproduce

1. Clone https://github.com/Marcono1234/junit5-module-issue-demo
2. Run ./gradlew build
   ❌ It fails with a FindException

Context

• Used versions (Jupiter/Vintage/Platform): org.junit.jupiter:junit-jupiter:5.8.1
• Build Tool/IDE: Gradle 7.2

[sormuras]

🤔 What's the difference to this Gradle configuration? "Just" the usage of the BOM file?

Groovy: https://github.com/junit-team/junit5-samples/blob/main/junit5-jupiter-starter-gradle-groovy/build.gradle
Kotlin: https://github.com/junit-team/junit5-samples/blob/main/junit5-jupiter-starter-gradle-kotlin/build.gradle.kts

[Marcono1234]

I have only checked https://github.com/junit-team/junit5-samples/tree/main/junit5-jupiter-starter-gradle now but I don't think that makes a difference. The main difference is usage of the module system. When I edit junit5-jupiter-starter-gradle by:

• Adding src/main/java/module-info.java

   module example {
      exports com.example.project;
  }

• Adding src/test/java/module-info.java

  open module test {
      requires example;
  
      requires org.junit.jupiter.api;
      requires org.junit.jupiter.params;
  }

• Changing package name of CalculatorTests (because two modules cannot contain the same package) and adding the import

I get the same exception as above.

[arjenzhou]

After upgrading from 5.7.2 to 5.8.1, I have the same issue.

[marcphilipp]

The problem seems to be that Gradle is bundling a pre-5.8 version of junit-platform-launcher. Adding an explicit testRuntimeOnly("org.junit.platform:junit-platform-launcher") dependency to the build script "solves" the issue.

@Marcono1234 Could you please raise an issue with Gradle to get this upgraded?

[Marcono1234]

Have created gradle/gradle#18627; hopefully that includes all necessary information.