Getting started with TDD

JavaScript
1

I had done Bootcamp in JS but never understood TDD until now doing a course on YT. I made some basic tests for angram, Can someone tell me is it good test to get started, I am building on top of it but I wanted to ask if I am on the right path

*.test.js

describe('Angrams', () => { 
    it('should return true if Angram', () => {
        const input = "elbow"
        const valueToCheck = "below"
        const actual = getLetterCount(input, valueToCheck);
        const expected = true
        expect(actual).toBe(expected)
    });
    it('should return false if not a Angram', () => {
        const input = "water"
        const valueToCheck = "radio"
        const actual = getLetterCount(input, valueToCheck);
        const expected = false
        expect(actual).toBe(expected)
    });

*.js

function getLetterCount(string, ingram){
    //split the args into array
    let arrayOne = string.split("");
    let arrayTwo = ingram.split("");
    console.log(arrayOne);
    console.log(arrayTwo);
    //sort each args using array's .sort method
    let arrayOneSorted = arrayOne.sort();
    let arrayTwoSorted = arrayTwo.sort();
    //join array that has been sorted
    //compare if new sorted item are same, 
    let sortedOne = arrayOneSorted.join("");
    let sortedSecond = arrayTwoSorted.join("");
    //if they are, return true
    if(sortedOne == sortedSecond){
        return true
    }else{
        return false
    }
}

Edit ; As @RandellDawson pointed out in post # 2, there was mistake in description so I have updated the question

2

I don’t understand how both true and false.

3

your right, the description should say

If not angram, should return false

I just copied and pasted the above.