[英]Jest saying "Not a function" when it is defined as function
I am writing jest for this simple function:我正在为这个简单的 function 写笑话:
function isVowel(ch) {
ch = ch.toUpperCase();
return ch == "A" || ch == "E" || ch == "I" || ch == "O" || ch == "U";
}
this is the jest:这是笑话:
const isVowel = require("./isVowel");
test("a is vowel", () => {
const ch = isVowel("a");
expect(ch).toBe("A");
});
on running, it gives error: TypeError: isVowel is not a function运行时出现错误:TypeError: isVowel is not a function
how to resolve it?如何解决?
I assume you write your code in commonjs
format due to the way you require
it in your test file so you just simply export like this:由于您在测试文件中
require
它的方式,我假设您以commonjs
格式编写代码,因此您只需像这样导出:
// isVowel.js
function isVowel(ch) {
ch = ch.toUpperCase();
return ch == "A" || ch == "E" || ch == "I" || ch == "O" || ch == "U";
}
module.exports = isVowel;
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.