feat: return max mismatch to callback

Author: mojoaxel

lib/wraith.js

@@ -240,6 +240,7 @@ Wraith.prototype.compareScreenshots = function() {
 	}
 
 	self.compareQueue = [];
+	self.maxMismatch = 0;
 
 	for(var url in self.urls) {
 		var dir = self.urls[url].substring(1).replace(/\/+$/,'') + '/';
@@ -278,6 +279,7 @@ Wraith.prototype.compareScreenshots = function() {
 	async.eachLimit(self.compareQueue, self.maxConnections, function(task, callback) {
 		resemble('./' + task.base).compareTo('./' + task.compare).ignoreAntialiasing().onComplete(function(data) {
 			data.getDiffImage().pack().pipe(fs.createWriteStream(task.output));
+			self.maxMismatch = data.misMatchPercentage > self.maxMismatch ? data.misMatchPercentage : self.maxMismatch;
 			fs.writeFile('./' + task.diff, data.misMatchPercentage, function(err) {
 				if(err) { log.error(err); }
 				if(bar) {
@@ -298,7 +300,7 @@ Wraith.prototype.compareScreenshots = function() {
 				self.generateGallery();
 			} else {
 				helpers.emptyFolder(self.outputFolder, function() {
-					self.cb();
+					self.cb(self.maxMismatch);
 				});
 			}
 			return self;
@@ -314,6 +316,6 @@ Wraith.prototype.generateGallery = function() {
 		self.outputFolder,
 		self.config.project,
 		self.server,
-		self.cb
+		function() { self.cb(self.maxMismatch); }
 	);
 };