Different Maven and Gradle execution of Java 9+ Modular Junit 5 tests

[DJViking (Sverre Moe)]

While Maven just works, with Gradle you have to set various module command line arguments

Gradle doesn't add modules to module-path during compile

I started a new project, which is modularized. It contains 4 dependencies, two of which is also modularized. compile group: 'org.controlsfx', name: 'controlsfx', version: '9.0.0' compile group: 'com.jfoenix', name: 'jfoenix', version: '9.0.4' compile group: 'org.jfxtras', name: 'jfxtras-controls', version: '9.0-r1' compile group: 'com.google.protobuf', name: 'protobuf-java', version: '3.5.1' testCompile group: 'org.junit.jupiter', name: 'junit-jupiter-api', version: '5.2.0' testRuntime group: …

Need to add this boilerplate code for compileTestJava and test tasks:

compileTestJava {
    inputs.property("moduleName", moduleName)
    doFirst {
        options.compilerArgs = [
            '--module-path', classpath.asPath,
            '--add-modules', 'org.junit.jupiter.api',
            '--add-reads', "$moduleName=org.junit.jupiter.api",
           '--patch-module', "$moduleName=" + files(sourceSets.test.java.srcDirs).asPath,
        ]
        classpath = files()
    }
}

test {
    useJUnitPlatform()

    doFirst {
        jvmArgs = [
            '--module-path', classpath.asPath
        ]
    }
}