seajs require函數(shù)返回的是undefind？

html

<script src="https://cdn.bootcss.com/seajs/3.0.2/runtime.js"></script>
<script>
    seajs.use('./controler/index')
</script>

index.js

define(function (require, exports, module) {
    // snip...
    var a = require('./test');
    console.log(a)
});

test.js

define(function (require, exports, module) {
    // snip...
    exports.name = '123'
});

執(zhí)行結(jié)果

請(qǐng)問(wèn)是什么原因??？