Write tests using Jest

api.test.js

const getCatFact = require('./apitest');

test(`get catFacts`, () => {
    getCatFact('facts', () => {
        expect(getCatFact.resolve('facts')).resolves.toBe('facts')
    })
  })

Apitest.js

const axios = require("axios")

const getCatFact = async (req, res) => {
    try{
        const url = "https://cat-fact.herokuapp.com/facts/random?animal"

        const response = await axios.get(url)
        const facts  = response.data
        console.log(facts)
        res.json(
            facts.map((facts) => {
                return({facts})
            })
        )
    }catch(err){
        console.log(err)
        res.status(503).json({status: `error`, message: `Service Unavailable`})
    }

}

module.exports = getCatFact;

multipleArray.js

function multipleArray(arr){

    let myArr = [];

    for (let i = 0; i < arr.length; i++){

    if(Array.isArray(arr)){

    myArr[i] = arr[i] * 2;

    }else{
        console.log ("Parameter isn't a number");
    }
}
    return myArr;
}

console.log(multipleArray([1, 2, 4, 8]));

module.exports = multipleArray;

multipleArray.test.js

const multipleArray = require('./arraytest');

test("mutiply each array element by 2", () => {
    expect (multipleArray([1, 2, 4, 8])).toEqual([2, 4, 8, 16]);
});