check-writing.js

/*When you write a check , to validate the amount,
you have to write the english words for the amount on a separate line.
For example check for $123.45
has a line with

one hundred twenty three and 45/100s dollars

Given a function 'toEnglish' that accepts a Javascript 'number' and returns a 'string' formatted for use on a check, as above.
*/


var expect = require('chai').expect;

function toWord(number){
    if (number === 0){
        return "zero";
    }
    if (number === 1){
        return "one";
    }
    if (number === 2){
        return "two";
    }
    if (number === 3){
        return "three";
    }
    if (number === 4){
        return "four";
    }
    if (number === 5){
        return "five";
    }
    if (number === 6){
        return "six";
    }
    if (number === 7){
        return "seven";
    }
    if (number === 8){
        return "eight";
    }
    if (number === 9){
        return "nine";
    }
    if (number === 10){
        return "ten";
    }
    if (number === 11){
        return "eleven";
    }
    if (number === 12){
        return "twelve";
    }
    if (number === 13){
        return "thirteen";
    }
    if (number === 14){
        return "fourteen";
    }
    if (number === 15){
        return "fifteen";
    }
    if (number === 16){
        return "sixteen";
    }
    if (number === 17){
        return "seventeen";
}
}

// Test cases here...
expect(toWord).to.exist;
expect(toWord(0)).to.equal("zero");
expect(toWord(1)).to.equal("one");
expect(toWord(2)).to.equal("two");
expect(toWord(3)).to.equal("three");
expect(toWord(4)).to.equal("four");
expect(toWord(5)).to.equal("five");
expect(toWord(6)).to.equal("six");
expect(toWord(7)).to.equal("seven");
expect(toWord(8)).to.equal("eight");
expect(toWord(9)).to.equal("nine");
expect(toWord(10)).to.equal("ten");
expect(toWord(11)).to.equal("eleven");
expect(toWord(12)).to.equal("twelve");
expect(toWord(13)).to.equal("thirteen");
expect(toWord(14)).to.equal("fourteen");
expect(toWord(15)).to.equal("fifteen");
expect(toWord(16)).to.equal("sixteen");
expect(toWord(17)).to.equal("seventeen");