99 lines
2.6 KiB
JavaScript
99 lines
2.6 KiB
JavaScript
import {
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addTrack,
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deleteTrack,
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hasTrack,
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listArtists,
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removeDuplicates,
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} from './ozans-playlist';
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describe('removeDuplicates', () => {
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test('works for an empty playlist', () => {
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const playlist = [];
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expect(removeDuplicates(playlist)).toEqual([]);
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});
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test('works for a non-empty playlist', () => {
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const TRACK_1 = 'Two Paintings and a Drum - Carl Cox';
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const TRACK_2 = 'Leash Called Love - The Sugarcubes';
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const playlist = [TRACK_1, TRACK_2, TRACK_1];
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const expected = [TRACK_1, TRACK_2];
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expect(removeDuplicates(playlist)).toEqual(expected);
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});
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});
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describe('hasTrack', () => {
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const TRACK_1 = 'Big Science - Laurie Anderson';
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const TRACK_2 = 'Tightrope - Laurie Anderson';
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test('returns true when the track is in the playlist', () => {
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const playlist = [TRACK_1, TRACK_2];
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expect(hasTrack(playlist, TRACK_1)).toBe(true);
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});
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test('returns false when the track is not in the playlist', () => {
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const playlist = [TRACK_2];
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expect(hasTrack(playlist, TRACK_1)).toBe(false);
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});
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});
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describe('addTrack', () => {
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const TRACK_1 = 'Jigsaw Feeling - Siouxsie and the Banshees';
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const TRACK_2 = 'Feeling Good - Nina Simone';
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test('adds a track that is not already in the playlist', () => {
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const playlist = [];
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const expected = [TRACK_1];
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expect(addTrack(playlist, TRACK_1)).toEqual(expected);
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});
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test('does not add a track that is already in the playlist', () => {
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const playlist = [TRACK_1, TRACK_2];
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const expected = [TRACK_1, TRACK_2];
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expect(addTrack(playlist, TRACK_1)).toEqual(expected);
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});
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});
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describe('deleteTrack', () => {
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const TRACK_1 = 'Ancestors - Tanya Tagaq';
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const TRACK_2 = 'Take This Hammer - Lead Belly';
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test('works if the track is present in the playlist', () => {
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const playlist = [TRACK_1, TRACK_2];
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const expected = [TRACK_2];
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expect(deleteTrack(playlist, TRACK_1)).toEqual(expected);
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});
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test('works if the track is not present in the playlist', () => {
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const playlist = [TRACK_2];
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const expected = [TRACK_2];
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expect(deleteTrack(playlist, TRACK_1)).toEqual(expected);
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});
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});
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describe('listArtists', () => {
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test('works for an empty playlist', () => {
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const playlist = [];
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expect(listArtists(playlist)).toEqual([]);
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});
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test('works for a non-empty playlist', () => {
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const playlist = [
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'Onu Alma Beni Al - Sezen Aksu',
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'Famous Blue Raincoat - Leonard Cohen',
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'Rakkas - Sezen Aksu',
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];
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const expected = ['Sezen Aksu', 'Leonard Cohen'];
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expect(listArtists(playlist)).toEqual(expected);
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});
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});
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