odin-default-js-exercises/snakeCase/snakeCase.spec.js

const snakeCase = require('./snakeCase')

describe("snakeCase", () => {
  it("works with simple lowercased phrases", () => {
    expect(snakeCase("hello world")).toEqual("hello_world");
  });
  it("works with Caps and punctuation", () => {
    expect(snakeCase("Hello, World???")).toEqual("hello_world");
  });
  it("works with longer phrases", () => {
    expect(snakeCase("This is the song that never ends....")).toEqual(
      "this_is_the_song_that_never_ends"
    );
  });
  it("works with camel case", () => {
    expect(snakeCase("snakeCase")).toEqual("snake_case");
  });
  it("works with kebab case", () => {
    expect(snakeCase("snake-case")).toEqual("snake_case");
  });
  it("works with WTF case", () => {
    expect(snakeCase("SnAkE..CaSe..Is..AwEsOmE")).toEqual(
      "snake_case_is_awesome"
    );
  });
});