一道关于this指向的js笔试题

Question

var Test ={

  foo:"test",

  func:function () {

    var self=this;

    console.log(this.foo);

    console.log(self.foo);

    (function () {

      console.log(this.foo);

      console.log(self.foo);

    })();

  }

};

Test.func();

输出 test test undefined test