update gulp test pattern

Author: doowb

gulpfile.js

@@ -13,7 +13,7 @@ gulp.task('coverage', ['eslint'], function() {
 });
 
 gulp.task('mocha', ['coverage'], function() {
-  return gulp.src('test/*.js')
+  return gulp.src('test/{integration/,}*.js')
     .pipe(mocha({reporter: 'spec'}))
     .pipe(istanbul.writeReports())
     .pipe(istanbul.writeReports({