我是打字稿、反应和单元测试的新手。如何用 jest 为以下函数编写测试用例？

Question

这是一个打字稿函数。我想为此写一个测试用例。

FUNCTION # 1:- TO CALCULATE DAYS LEFT IN NEXT BIRTHDAY

let daysLeft=('Birthday on ' + moment(date).format("D MMM") + ' (in ' + moment(moment(date)).add(moment(moment().format("YYYY-MM-DD")).diff(moment(date), "years") + 1, "years").diff(moment().format("YYYY-MM-DD"), "days") + ' days)');

        if (birthday === today){
          return ('Today is a big day!')
        }
        else {return daysLeft;}
        }

FUNCTION # 2:- TO CALCULATE THE AGE

const ageCalculate = (date: any) : any => {
           return ( moment(moment().format("YYYY-MM-DD")).diff(moment(date), "years")); 
           }

Answer 1

这就是我喜欢在 class 中测试我的功能的方式。我在项目的根目录下创建了一个 test 文件夹，并创建了某种 classYouAreTesting.spec.ts 文件。

在那个文件中，我会有以下代码

//import whatever you need 

describe("Birthday class tests", () => {
    it("Today is my birthday", () => {
        //birthday class initializes to some arbitrary date, let's say "01-01-1994"
        const birthday = new Birthday();
        //getBirthday will return a string representation of the date
        const result = birthday.getBirthday();
        expect(result).toEqual("01-01-1994");
    });

});

Answer 2

我自己确实能做到。解决方案如下：

test('Checking days left in next bday', () => {
expect(functions.daysleft('2016-04-10')).toBe(1);
});

test('Checking days left in next bday', () => {
expect(functions.ageCalculate('1990-04-10')).toBe(28);
});

我是打字稿、反应和单元测试的新手。如何用 jest 为以下函数编写测试用例？

I am new to typescript, react and unit testing. How can I write test case for the following function with jest?

testcase

typescript

jestjs