Gradle 1.2: Exclude directory under resources sourceSets - gradle

Question

I have development related directory src/main/resources/certs/test which is needed for one external library. This has some cert files which are not needed in production build.
At the moment I exclude everything under that directory with following block in build.gradle:
sourceSets {
main {
resources {
exclude '**/test/*'
}
}
}
This does it job well, but leaves ugly empty directory test lying there. What are my options to not include this directory in final war?
I've tried excluding '**/test', but it doesn't work at all.
I use war plugin and Gradle 1.2

Answer 1

Using Gradle 1.1, this works for me:
apply plugin: 'war'
sourceSets {
main {
resources {
exclude '**/test/*'
exclude 'certs/test'
}
}
}

Answer 2

I had a similar problem with production files in a JAR file (though mine were not test files). I solved it with the following:
jar {
exclude ("DIRECTORY-TO-EXCLUDE/**")
}
e.g.
jar {
exclude ("test/**")
}

Answer 3

A common projet layout is to put test files under the test source set, this way you don't have to exclude them from the main source set.
From the Gradle documentation, the default project layout is like this:
src/main/java Production Java source
src/main/resources Production resources
src/test/java Test Java source
src/test/resources Test resources