How to include test classes into shadowJar?

Question

I am using shadow Gradle plugin to build JAR, containing all referenced jars inside.

In my build.gradle I have only

apply plugin: "com.github.johnrengelman.shadow"

and

jar {
    manifest {
        attributes 'Main-Class': 'MYCLASS'
    }

}

related to that. I don't know, how it knows, what to build, but it works.

Now, is it possible, to include test classes too?

Did you come up with any solution on this one? – yuva Jul 25 '17 at 20:23 — yuva, Jul 25 '17 at 20:23

score 4 · Answer 1 · edited Jan 09 '19 at 09:15

4

From the official documentation https://imperceptiblethoughts.com/shadow/custom-tasks/

Shadowing Test Sources and Dependencies

import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar task testJar(type: ShadowJar) { classifier = 'tests' from sourceSets.test.output configurations = [project.configurations.testRuntime] }

The code snippet above will geneated a shadowed JAR contain both the main and test sources as well as all runtime and testRuntime dependencies. The file is output to build/libs/--tests.jar.

edited Jan 09 '19 at 09:15

Peter Butkovic

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answered Jan 01 '18 at 14:36

Eyal Roth

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Unfortunately, the JAR is empty for me. There are neither dependencies nor source classes in it. – Harold L. Brown May 15 '20 at 19:30
Doesn't work for me either. Running the jar just outputs `Error: Could not find or load main class org.scalatest.tools.Runner`. Btw I have `dependencies { testRuntime "org.scalatest:scalatest_${scalaBinaryVersion}:3.0.5" }`. – jirislav Jul 23 '20 at 14:23
@jirislav seeing that these are the official instructions on how to accomplish the task, I would advise you to visit the [plugin's github page](https://github.com/johnrengelman/shadow) and open an issue there if necessary. – Eyal Roth Jul 31 '20 at 11:27
1

My tests get included but these won't include the main sources. – dtc Nov 03 '20 at 21:22

score 4 · Answer 2 · answered May 16 '21 at 09:31

The official documentation seems out of date with the latest (v7.0.0) version of the plugin. Using this version and the latest version of gradle (7.0), I do this:

task testJar(type: com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar) {
    archiveClassifier.set("alltests")
    from sourceSets.main.output, sourceSets.test.output
    configurations = [project.configurations.testRuntimeClasspath]
}

The docs have both the from clause and the "configurations" clause wrong.

as a comment on the other answer mentions, the main classes (whihc are normally your classes under test) are missing from the jar, so you need to add sourceSets.main.output
the project.configurations.testRuntime doesn't work as documented, it tells me testImplementation' is not allowed as it is defined as 'canBeResolved=false

How to include test classes into shadowJar?

2 Answers2