gulp auto run test cases

gulpfile.js

var gulp = require('gulp'),  
    sys = require('sys'),
    exec = require('child_process').exec;
 
gulp.task('phpunit', function() {
    exec('phpunit', function(error, stdout) {
        sys.puts(stdout); 
    });
}); 
 
gulp.task('default', function() {
    gulp.watch('**/*.php', { debounceDelay: 2000 }, ['phpunit']);   
});