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" ); }); });