Test result that happened on the Web Summit Rio da Codewars and Andela

challenge.js

const makeStaircase = (value) => {
  const items = value.split(" ").filter(Boolean);
  if (items.length === 0) return value;

  let index = 0;
  let result = "";
  let spaceSize = 0;

  for (let item of items) {
    let space = " ".repeat(spaceSize);

    if (index % 2 === 1) {
      item = space.concat(item.split("").join("\n".concat(space)));
    } else {
      spaceSize += item.length - 1;
      item = space.concat(item);
    }

    if (index != items.length - 1) {
      item = item.concat("\n");
    }

    result += item;
    index++;
  }

  return result.trim();
};

module.exports = makeStaircase;

challenge.test.js

const makeStaircase = require("./challenge");

describe("makeStaircase", () => {
  it("should work on an empty string", () => {
    expect(makeStaircase("")).toBe("");
  });

  it("should work on 'Rio'", () => {
    expect(makeStaircase("Rio")).toBe("Rio");
  });

  it("should work on 'Web Summit Rio'", () => {
    expect(makeStaircase("Web Summit Rio")).toBe(
      `
Web
  S
  u
  m
  m
  i
  t
  Rio
`.slice(1, -1)
    );
  });

  it("should work on 'Welcome to the Andela booth!'", () => {
    expect(makeStaircase("Welcome to the Andela booth!")).toBe(
      `
Welcome
      t
      o
      the
        A
        n
        d
        e
        l
        a
        booth!
`.slice(1, -1)
    );
  });

  it("should work on 'a lot of tiny little words in a sentence'", () => {
    expect(makeStaircase("a lot of tiny little words in a sentence")).toBe(
      `
a
l
o
t
of
 t
 i
 n
 y
 little
      w
      o
      r
      d
      s
      in
       a
       sentence
`.slice(1, -1)
    );
  });

  it("should work on 'Thanks for checking out the Andela booth!'", () => {
    expect(makeStaircase("Thanks for checking out the Andela booth!")).toBe(
      `
Thanks
     f
     o
     r
     checking
            o
            u
            t
            the
              A
              n
              d
              e
              l
              a
              booth!
`.slice(1, -1)
    );
  });
});

package.json

{
  "devDependencies": {
    "jest": "^29.5.0"
  }
}