hi Robert,
you over ride the gradle java plugin's test task like this:
test {
ignoreFailures = true //use this to allow build to continue for CI purposes
useTestNG()
options.suites("src/test/resources/testng.xml") //pick up centralized xml suite for each sub project
}
put this in your top level build.gradle and it will get run with the build task and iterate over each sub project
Jonathan