[Groovy] cucumber-jvm-groovy sample (step definition)

HelloSteps.groovy

this.metaClass.mixin(cucumber.runtime.groovy.Hooks)
this.metaClass.mixin(cucumber.runtime.groovy.EN)

Given(~'^I have a hello app with "([^"]*)"$') { String arg1 ->
    hello = new Hello(arg1)
}

When(~'^I ask it to say hi$') { ->
    hi = hello.sayHi();
}

Then(~'^it should answer with "([^"]*)"$') { String arg1 ->
    assert arg1 == hi
}