1.map-filter-find.test.js

const pokemons = require("./pokeData");
const {
  getPokeNames,
  getPokemonById,
  getRarePokemons,
  getMidSizedPokemon,
  getAdultPokemons,
  getPokemonImages,
} = require("./1.map-filter-find");

test("getPokeNames: Transforms an array of pokemons into an array of pokemon names", () => {
  const pokemonNames = getPokeNames();
  expect(pokemonNames.length).toBe(151);
  expect(pokemonNames[0]).toBe("Bulbasaur");
  expect(pokemonNames[pokemonNames.length - 1]).toBe("Mew");
});

test("getPokemonById: Gets a pokemon object by their id", () => {
  const id = 25;
  const pokemon = getPokemonById(id);
  expect(pokemon).toEqual(
    expect.objectContaining({
      id: expect.any(Number),
      name: expect.any(String),
      height: expect.any(String),
    })
  );
  expect(pokemon.id).toBe(25);
  expect(pokemon.name).toBe("Pikachu");
  expect(pokemon.height).toBe("0.41 m");
});

test('getRarePokemons: Transforms an array of pokemon into an array of "rare" (spawn_chance is less than 0.1) pokemon', () => {
  const rarePokemon = getRarePokemons();
  expect(rarePokemon.length).toBe(81);
  expect(rarePokemon.every((pokemon) => pokemon.spawn_chance < 0.1)).toBe(true);
});

test('getMidSizedPokemon: Gets the pokemon that weighs "38.0 kg"', () => {
  const pokeMonThatWeighs38kg = getMidSizedPokemon();
  expect(pokeMonThatWeighs38kg.name).toBe("Fearow");
});

test("getAdultPokemons: Transforms an array of pokemon into an array of pokemon who cannot be found in eggs", () => {
  const adults = getAdultPokemons();
  expect(adults.length).toBe(78);
  expect(adults.every((pokemon) => pokemon.egg === "Not in Eggs")).toBe(true);
});

test("getPokemonImages: Transforms an array of pokemon into an array of imageUrls", () => {
  const imageUrls = getPokemonImages();
  imageUrls.forEach((imageUrl) => {
    expect(typeof imageUrl).toBe("string");
  });
});