unit.js

(function(Prismic) {
    var structuredText = {
        type: 'StructuredText',
        value: [{
            type: 'paragraph',
            text: 'Hi everyone, I am an awesome text!',
            spans: [{
                start: 0,
                end: 11,
                type: 'strong'
            },{
                start: 3,
                end: 11,
                type: 'em'
            },{
                start: 13,
                end: 17,
                type: 'strong'
            },{
                start: 17,
                end: 28,
                type: 'em'
            }]
        }]
    };

    module('Prismic.io', {
        setup: function() {}
    });

    test('should init and render StructuredText', function () {
        var html = '<p><strong>Hi <em>everyone</em></strong>, <strong>I am</strong><em> an awesome</em> text!</p>';
        var fragment = Prismic.Fragments.initField(structuredText);

        equal(html, fragment.asHtml());
    });
})(window.Prismic);