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feat: edit test.js for learn this #144

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9 changes: 5 additions & 4 deletions test/test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,8 @@ describe('this', function () {
say: function () {
setTimeout(() => {
// this 是什么？想想为什么？
this.should.equal(null)
// 箭头函数的this会捕获其所在（即定义的位置）上下文的this值，而当前上下文的this正是obj
this.should.equal(obj)
done()
}, 0)
}
Expand All @@ -15,7 +16,7 @@ describe('this', function () {
it('global', function () {
function test() {
// this 是什么？想想为什么？
this.should.equal(null)
this.should.equal(global)
}
test()
})
Expand All @@ -26,7 +27,7 @@ describe('this', function () {
say: function () {
function _say() {
// this 是什么？想想为什么？
this.should.equal(null)
this.should.equal(global)
}
return _say.bind(obj)
}()
Expand All @@ -39,7 +40,7 @@ describe('this', function () {
obj.say = function () {
function _say() {
// this 是什么？想想为什么？
this.should.equal(null)
this.should.equal(obj)
}
return _say.bind(obj)
}()
Expand Down