Gradle task check if property is defined

Question

I have a gradle task that executes a testng test suite. I want to be able to pass a flag to the task in order to use a special testng xml suite file (or just use the default

Answer 1

This worked for me:

test {
    if (properties.containsKey('special')) {
        test(testng_special.xml);
    }
    else {
        test(testng_default.xml);
    }
}