FitNesse. UserGuide.
ActionFixtureCode [add child]

The Fixture Code for Action Fixtures


Here is our example test table from the ActionFixture page:

Action Fixture.
start fitnesse.fixtures.CountFixture
check counter 0
press count
check counter 1
press count
check counter 2
enter counter 5
press count
check counter 6

And here is the code for the CountFixture:
public class CountFixture extends Fixture {
private int counter = 0;

public void count() {
counter++;
}

public int counter() {
return counter;
}
}
As you can see, the names of the buttons (check, press, and enter) and registers (count and counter) correspond directly to methods in the 'started' fixture. And the meter values (the numbers in the rightmost column) are returned by the counter() method. It's really as simple as that.