test.js

        it('for intlMessage', function () {                                                                           
            var tmpl = '{@intl formats=intl.formats}{@intlMessage _msg=MSG product=PRODUCT price=PRICE deadline=DEADLINE timeZone=TZ/}{/intl}',
                ctx = {                                                                                               
                    MSG: '{product} cost {price, usd} (or {price, eur}) if ordered by {deadline, date, medium}',      
                    intl: {                                                                                           
                        formats: {                                                                                    
                            eur: function(val, locale, options) {                                                     
                                return new intl.NumberFormat(locale, {                                                
                                    style: 'currency',                                                                
                                    currency: 'EUR'                                                                   
                                }).format(val);                                                                       
                            },                                                                                        
                            usd: function(val, locale, options) {                                                     
                                return new intl.NumberFormat(locale, {                                                
                                    style: 'currency',                                                                
                                    currency: 'USD'                                                                   
                                }).format(val);                                                                       
                            },                                                                                        
                            ymd: function(val, locale, options) {                                                     
                                return new intl.DateTimeFormat(locale, {                                              
                                    year: 'numeric',                                                                  
                                    month: 'numeric',                                                                 
                                    day: 'numeric'                                                                    
                                }).format(val);                                                                       
                            }                                                                                         
                        }                                                                                             
                    },                                                                                                
                    PRODUCT: 'oranges',                                                                               
                    PRICE: 40000.004,                                                                                 
                    DEADLINE: timeStamp,                                                                              
                    TZ: 'UTC'                                                                                         
                },                                                                                                    
                expected = "oranges cost $40,000.00 (or €40,000.00) if ordered by Jan 23, 2014";                      
            Dust.renderSource(tmpl, ctx, function(err, out) {                                                         
                expect(out).to.equal(expected);                                                                       
            });                                                                                                       
        });