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<p><a href="http://jbehave.org/">JBehave</a> is a Behaviour Driven Development (<a href="http://en.wikipedia.org/wiki/Behavior_driven_development">BDD</a>) framework for Java.</p>

<p>The sections below illustrate using JBehave for the examples from <a class="confluence-link" href="/display/GROOVY/Using+Testing+Frameworks+with+Groovy" data-linked-resource-id="67695" data-linked-resource-type="page" data-linked-resource-default-alias="Using Testing Frameworks with Groovy" data-base-url="http://docs.codehaus.org">Using Testing Frameworks with Groovy</a>.</p>

<h2>The Stack Example</h2>

<p>Here is how you might use JBehave to test the <a class="confluence-link" href="/display/GROOVY/Using+Testing+Frameworks+with+Groovy#UsingTestingFrameworkswithGroovy-AStackExample" data-anchor="AStackExample" data-linked-resource-id="67695" data-linked-resource-type="page" data-linked-resource-default-alias="Using Testing Frameworks with Groovy#AStackExample" data-base-url="http://docs.codehaus.org">Stack Example</a>:</p>

<table class="wysiwyg-macro" data-macro-name="code" style="background-image: url(/plugins/servlet/confluence/placeholder/macro-heading?definition=e2NvZGV9&amp;locale=en_GB&amp;version=2); background-repeat: no-repeat;" data-macro-body-type="PLAIN_TEXT"><tr><td class="wysiwyg-macro-body"><pre>
// require(url:'http://jbehave.org/', jar='jbehave-1.0.1.jar')
import org.jbehave.core.Run
import org.jbehave.core.behaviour.Behaviours

class AlmostEmptyFixedStackBehavior {
    private stack

void setUp() {
        stack = new FixedStack()
        stack.push 'anything'
        assert !stack.isEmpty()
    }

void shouldRemainNotEmptyAfterPeek() {
        stack.peek()
        assert !stack.isEmpty()
    }

void shouldBecomeEmptyAfterPop() {
        stack.pop()
        assert stack.isEmpty()
    }
}

class AlmostFullFixedStackBehavior {
    private stack

void setUp() {
        stack = new FixedStack()
        (1..&lt;FixedStack.MAXSIZE).each{ x -> stack.push x }
        assert !stack.isFull()
    }

void shouldBecomeFullAfterPush() {
        stack.push 'anything'
        assert stack.isFull()
    }
}

class EmptyFixedStackBehavior extends GroovyTestCase {
    private stack = new FixedStack()

void shouldInitiallyBeEmpty() {
        assert stack.isEmpty()
    }

void shouldNoLongerBeEmptyAfterPush() {
        stack.push 'anything'
        assert !stack.isEmpty()
    }

void shouldComplainWhenSentPeek() {
        shouldFail(StackUnderflowException) {
            stack.peek()
        }
    }

void shouldComplainWhenSentPop() {
        shouldFail(StackUnderflowException) {
            stack.pop()
        }
    }
}

class FullFixedStackBehavior extends GroovyTestCase {
    private stack

void setUp() {
        stack = new FixedStack()
        (1..FixedStack.MAXSIZE).each{ x -> stack.push x }
        assert stack.isFull()
    }

void shouldRemainFullAfterPeek() {
        stack.peek()
        assert stack.isFull()
    }

void shouldNoLongerBeFullAfterPop() {
        stack.pop()
        assert !stack.isFull()
    }

void shouldComplainOnPush() {
        shouldFail(StackOverflowException) {
            stack.push 'anything'
        }
    }
}

class NonEmptyFixedStackBehavior {
    private stack

void setUp() {
        stack = new FixedStack()
        ('a'..'c').each{ x -> stack.push x }
        assert !stack.isEmpty()
    }

void shouldAddToTheTopWhenSentPush() {
        stack.push 'd'
        assert stack.peek() == 'd'
    }

void shouldBeUnchangedWhenSentPushThenPop() {
        stack.push 'anything'
        stack.pop()
        assert stack.peek() == 'c'
    }

void shouldReturnTheTopItemWhenSentPeek() {
        assert stack.peek() == 'c'
    }

void shouldNotRemoveTheTopItemWhenSentPeek() {
        assert stack.peek() == 'c'
        assert stack.peek() == 'c'
    }

void shouldReturnTheTopItemWhenSentPop() {
        assert stack.pop() == 'c'
    }

void shouldRemoveTheTopItemWhenSentPop() {
        assert stack.pop() == 'c'
        assert stack.pop() == 'b'
    }
}

class AllBehaviours implements Behaviours {
    Class[] getBehaviours() {
        return [
            AlmostEmptyFixedStackBehavior,
            AlmostFullFixedStackBehavior,
            EmptyFixedStackBehavior,
            FullFixedStackBehavior,
            NonEmptyFixedStackBehavior
        ]
    }
}

Run.main('AllBehaviours')
</pre></td></tr></table>

<h2>The Item Storer Example</h2>

<p>Here is how you might use JBehave to test the <a class="confluence-link" href="/display/GROOVY/Using+Testing+Frameworks+with+Groovy#UsingTestingFrameworkswithGroovy-AnItemStorerExample" data-anchor="AnItemStorerExample" data-linked-resource-id="67695" data-linked-resource-type="page" data-linked-resource-default-alias="Using Testing Frameworks with Groovy#AnItemStorerExample" data-base-url="http://docs.codehaus.org">Item Storer Example</a>:</p>

class JBehaveStorerBehavior {
    def storer = new Storer()

def static checkPersistAndReverse(cut, value, reverseValue) {
        cut.put(value)
        assert value == cut.get()
        assert reverseValue == cut.getReverse()
    }

void shouldReverseStrings() {
        checkPersistAndReverse storer, 'hello', 'olleh'
    }

void shouldReverseNumbers() {
        checkPersistAndReverse storer, 123.456, -123.456
    }

void shouldReverseLists() {
        checkPersistAndReverse storer, [1, 3, 5], [5, 3, 1]
    }
}

Run.main('JBehaveStorerBehavior')
</pre></td></tr></table>