add individual gulp tasks for edge, chrome and firefox

Author: ali-ince

gulpfile.babel.js

@@ -176,11 +176,27 @@ gulp.task('test-browser', function (cb) {
 });
 
 gulp.task('run-browser-test', function(cb){
+  runSequence('run-browser-test-firefox', cb);
+});
+
+gulp.task('run-browser-test-chrome', function(cb){
+  new karmaServer({
+    configFile: __dirname + '/test/browser/karma-chrome.conf.js',
+  }, cb).start();
+});
+
+gulp.task('run-browser-test-firefox', function(cb){
   new karmaServer({
     configFile: __dirname + '/test/browser/karma-firefox.conf.js',
   }, cb).start();
 });
 
+gulp.task('run-browser-edge', function(cb){
+  new karmaServer({
+    configFile: __dirname + '/test/browser/karma-edge.conf.js',
+  }, cb).start();
+});
+
 gulp.task('watch', function () {
   return watch('src/**/*.js', batch(function (events, done) {
       gulp.start('all', done);