EasyB testing multiple input/ouput values - testing

Question

How do I test a functionality with multiple inputs/expected outputs?
Here is a really simple example:
scenario "Can add two numbers", {
given "Two numbers", {
num1 = 2
num2 = 3
}
when "I trigger add.", {
result = add(num1,num2)
}
then "The result should be correct.", {
result.shouldBe 5
}
}
I want to test this with multiple values, say add(4,8).shouldBe 12, ....
Whats the best practice to do this? In other BDD frameworks I have seen table like structures to implement this, but cannot find something like that in EasyB. Should I create multiple scenarios to cover this (appending (1), (2) to the scenario name), or should I put the inputs and expected outputs into an array, and check this for equality?
If I use the latter approach, how do I get meaningfull failures?

Answer 1

Use the where/example clause
http://code.google.com/p/easyb/wiki/ChangesInEasyb098
package org.easyb.where
/*
Example tests a map at the story level
*/
numberArray = [12, 8, 20, 199]
where "we are using sample data at a global level", [number:numberArray]
before "Before we start running the examples", {
given "an initial value for counters", {
println "initial"
whenCount = 0
thenCount = 0
numberTotal = 0
}
}
scenario "Number is #number and multiplier is #multiplier and total is #{number * multiplier}", {
when "we multiply #number by #multiplier", {
whenCount ++
num = number * multiplier
}
then "our calculation (#num) should equal #{number * multiplier}", {
num.shouldBeGreaterThan 0
numberTotal += num
thenCount ++
}
where "Multipliers should be", {
multiplier = [1,2,3]
}
}
after "should be true after running example data", {
then "we should have set totals", {
whenCount.shouldBe 12
thenCount.shouldBe 12
num = 0
numberArray.each { n ->
num = num + (n + (2*n) + (3*n))
}
num.shouldBe numberTotal
}
}