jasmine-jquery helpers: toEqualDuration and better messaging

tests/lib/jasmine-ext.js

@@ -1,27 +1,64 @@
 
 beforeEach(function() {
+
 	jasmine.addMatchers({
 		toEqualMoment: function() {
 			return {
 				compare: function(actual, expected) {
-					return {
-						pass: $.fullCalendar.moment.parseZone(actual).format() ===
-							$.fullCalendar.moment.parseZone(expected).format()
+					var actualStr = $.fullCalendar.moment.parseZone(actual).format();
+					var expectedStr = $.fullCalendar.moment.parseZone(expected).format();
+					var result = {
+						pass: actualStr === expectedStr
 					};
+					if (!result.pass) {
+						result.message = 'Moment ' + actualStr + ' does not equal ' + expectedStr;
+					}
+					return result;
 				}
 			};
 		},
 		toEqualNow: function() {
 			return {
 				compare: function(actual) {
-					return {
-						pass: Math.abs(
-								$.fullCalendar.moment.parseZone(actual) -
-								new Date()
-							) < 1000 // within a second of current datetime
+					var actualMoment = $.fullCalendar.moment.parseZone(actual);
+					var result = {
+						pass: Math.abs(actualMoment - new Date()) < 1000 // within a second of current datetime
+					};
+					if (!result.pass) {
+						result.message = 'Moment ' + actualMoment.format() + ' is not close enough to now';
+					}
+					return result;
+				}
+			};
+		},
+		toEqualDuration: function() {
+			return {
+				compare: function(actual, expected) {
+					var actualStr = serializeDuration(moment.duration(actual));
+					var expectedStr = serializeDuration(moment.duration(expected));
+					var result = {
+						pass: actualStr === expectedStr
 					};
+					if (!result.pass) {
+						result.message = 'Duration ' + actualStr + ' does not equal ' + expectedStr;
+					}
+					return result;
 				}
 			};
 		}
 	});
-});
+
+	function serializeDuration(duration) {
+		return Math.floor(duration.asDays()) + '.' +
+			pad(duration.hours(), 2) + ':' +
+			pad(duration.minutes(), 2) + ':' +
+			pad(duration.seconds(), 2) + '.' +
+			pad(duration.milliseconds(), 3);
+	}
+
+	function pad(n, width) {
+		n = n + '';
+		return n.length >= width ? n : new Array(width - n.length + 1).join('0') + n;
+	}
+
+});