context.events.js

var btn = new Element('button',{html:'Run'}).addEvent('click', Context('dynamic').handleWith('handleClick'));

Ccontext(1).addHandler('handleClick', function(){alert(1);});
Ccontext(2).addHandler('handleClick', function(){alert(2);});

Context.set(1);
Context('dynamic') === Context(1);
btn.fireEvent('click'); // alert(1)

Context.set(2);
Context('dynamic') === Context(2);
btn.fireEvent('click'); // alert(2)

sequential.spec.js

// # -- sequential speccing

spec.group('id', 'description');

spec.add('some description', function(){});
spec.add('some other description', function(){});

spec.group('id2', 'description2');

spec.add('some description', function(){});
spec.add('some other description', function(){});

spec.run(); //starts every group
spec.run('id'); //starts the group id
spec.run('id', 'id2'); //starts the group id and id2