test gulp file

gulp.js

var gulp = require('gulp');
var minifycss = require('gulp-minify-css');
var autoprefixer = require('gulp-autoprefixer');
var notify = require('gulp-notify');
var stripDebug = require('gulp-strip-debug');
var uglify = require('gulp-uglify');


gulp.task('css', function() {
	return gulp.src('assets/css/sentinel.css')
	.pipe(autoprefixer())
	.pipe(minifycss())
	.pipe(gulp.dest('assets/css/test'));
	// .pipe(notify({message: 'All done :) '}));
});


gulp.task('js', function() {
	return gulp.src('assets/js/prime.js')
	.pipe(stripDebug())
        .pipe(uglify())
	.pipe(gulp.dest('assets/js/test'));
	// .pipe(notify({message: 'All done :) '}));
});


gulp.task('default', ['css', 'js'], function(){
	// gulp.run('css');

	gulp.watch('assets/css/*.css', function() {
	gulp.run('css');
	});

	gulp.watch('assets/js/*.js', function() {
	gulp.run('js');
	});
});

package.json

{
  "devDependencies": {
    "gulp": "^3.8.7",
    "gulp-autoprefixer": "0.0.10",
    "gulp-minify-css": "^0.3.7",
    "gulp-notify": "^1.5.0",
    "gulp-strip-debug": "^1.0.0",
    "gulp-uglify": "^1.0.0"
  }
}

terminal

takeaway  gulp
[03:40:16] Using gulpfile /var/www/wordpress/wp-content/themes/takeaway/gulpfile.js
[03:40:16] Starting 'css'...
[03:40:16] Starting 'js'...
[03:40:16] Finished 'js' after 28 ms
[03:40:16] Finished 'css' after 229 ms
[03:40:16] Starting 'default'...
[03:40:16] Finished 'default' after 49 ms