gradle pull test jar from other project - maven

Question

I have a multi-project setup in maven and trying to switch to gradle. I am trying to figure out how to have one project's test dependencies include another project's test jar. Right now i have the following in ProjectA:
packageTests = task packageTests(type: Jar) {
classifier = 'tests'
from sourceSets.test.output
}
tasks.getByPath(":ProjectA:jar").dependsOn(packageTests)
And in ProjectB i have:
testCompile project(path: ':ProjectA', classifier: 'tests')
I see that my tests are failing to compile. Looks like they are missing classes defined in the test jar. When I check the build dir, i see that the ProjectA-0.1.56-SNAPSHOT-tests.jar is present.
In maven I had the following for ProjectA:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>test-jar</goal>
</goals>
</execution>
</executions>
</plugin>
And this for ProjectB:
<!-- Testing -->
<dependency>
<groupId>com.example</groupId>
<artifactId>ProjectA</artifactId>
<version>0.1.56-SNAPSHOT</version>
<type>test-jar</type>
</dependency>
How can I get this to work just like maven?

Answer 1

What you will end up with is something like
tasks.create( [
name: 'testJar',
type: Jar,
group: 'build',
description: 'Assembles a jar archive containing the test classes.',
dependsOn: tasks.testClasses
] ) {
manifest = tasks.jar.manifest
classifier = 'tests'
from sourceSets.test.output
}
// for test dependencies between modules
// usage: testCompile project(path: ':module', configuration: 'testFixtures')
configurations { testFixtures { extendsFrom testRuntime } }
artifacts {
archives testJar
testFixtures testJar
}
tasks.uploadArchives.dependsOn testJar