02. Christmas Movies-Exam - 10 December 2019

describe('Christmas movie functionality', () => {
  let movies;
  let expectedResult;
  let actualResult;
  let throwFunc;

  beforeEach(() => {
    movies = new ChristmasMovies();
    expectedResult = '';
    actualResult = '';
  });

  describe('constructor functionality', () => {
    it('create movies object with corect properties', () => {
      expect(movies).to.have.own.property('movieCollection');
      expect(movies).to.have.own.property('watched');
      expect(movies).to.have.own.property('actors');
    });

    it('movecollection property is an array', () => {
      assert.deepEqual([], movies.movieCollection);
      assert.deepEqual({}, movies.watched);
      assert.deepEqual([], movies.actors);
    });

    it('all properties are initially an empty objects', () => {
      expect(movies.movieCollection.length).to.be.equal(0);
      expect(Object.keys(movies.watched).length).to.be.equal(0);
      expect(movies.actors.length).to.be.equal(0);
    });
  });

  describe('buyMovie method, functionality', () => {
    it('throws a new error, if the person allready own the given movie', () => {
      movies.buyMovie('Last Christmas', ['Emilia Clarke', 'Henry Golding']);
      throwFunc = () => movies.buyMovie('Last Christmas', ['Emilia Clarke', 'Henry Golding']);
      assert.throws(throwFunc, 'You already own Last Christmas in your collection!');
    });

    it('adds a bought movie to movies collection', () => {
      movies.buyMovie('Last Christmas', ['Emilia Clarke', 'Henry Golding']);
      actualResult = movies.movieCollection[0].name;
      expectedResult = 'Last Christmas';

      assert.equal(expectedResult, actualResult);
    });

    it('adds a bought movie to movies collection', () => {
      movies.buyMovie('Last Christmas', ['Emilia Clarke', 'Henry Golding']);
      movies.buyMovie('Past Christmas', ['Emily Clarkerson', 'Henry Golding']);
      actualResult = movies.movieCollection.length;
      expectedResult = 2;

      assert.equal(expectedResult, actualResult);
    });

    it('return proper message if movie is added successfully', () => {
      actualResult = movies.buyMovie('Last Christmas', ['Emilia Clarke', 'Henry Golding', 'Emilia Clarke']);
      expectedResult = `You just got Last Christmas to your collection in which ${['Emilia Clarke', 'Henry Golding'].join(', ')} are taking part!`;

      assert.equal(expectedResult, actualResult);
    });
  });

  describe('discardMovie method, functionality', () => {
    it('throws a new error, if there is no such a movie in collection', () => {
      throwFunc = () => movies.discardMovie('StarWars');
      assert.throws(throwFunc, 'StarWars is not at your collection!');
    });

    it('throws a new error in movie is not watched yet', () => {
      movies.buyMovie('StarWars', ['Luck', 'Lea', 'Han']);
      throwFunc = () => movies.discardMovie('StarWars');

      assert.throws(throwFunc, 'StarWars is not watched!');
    });

    it('returns proper message', () => {
      movies.buyMovie('StarWars', ['Luck', 'Lea', 'Han']);
      movies.watchMovie('StarWars');
      actualResult = movies.discardMovie('StarWars');
      expectedResult = 'You just threw away StarWars!';

      assert.equal(expectedResult, actualResult);
    });
  });

  describe('watchMovie method, functionality', () => {
    it('throws a new error, if there is no such a movie in collection', () => {
      throwFunc = () => movies.watchMovie('StarWars');
      assert.throws(throwFunc, 'No such movie in your collection!');
    });

    it('adds new movie in watched movies list', () => {
      movies.buyMovie('StarWars', ['Luck', 'Lea', 'Han']);
      movies.watchMovie('StarWars');
      actualResult = movies.watched.StarWars;
      expectedResult = 1;

      assert.equal(expectedResult, actualResult);
    });

    it('adds new movie in watched movies list', () => {
      movies.buyMovie('StarWars', ['Luck', 'Lea', 'Han']);
      movies.watchMovie('StarWars');
      movies.watchMovie('StarWars');
      movies.watchMovie('StarWars');
      actualResult = movies.watched.StarWars;
      expectedResult = 3;

      assert.equal(expectedResult, actualResult);
    });
  });

  describe('favouriteMovie method, functionality', () => {
    it('throws a new error, if there is no favorites movie', () => {
      movies.buyMovie('StarWars', ['Luck', 'Lea', 'Han']);
      throwFunc = () => movies.favouriteMovie();
      assert.throws(throwFunc, 'You have not watched a movie yet this year!');
    });

    it('return proper message, if tehre is favorite movie', () => {
      movies.buyMovie('StarWars IV', ['Luck', 'Lea', 'Han']);
      movies.buyMovie('StarWars V', ['Luck', 'Lea', 'Han']);
      movies.watchMovie('StarWars IV');
      movies.watchMovie('StarWars V');
      movies.buyMovie('StarWars VI', ['Luck', 'Lea', 'Han']);
      movies.watchMovie('StarWars IV');
      movies.watchMovie('StarWars V');
      movies.watchMovie('StarWars VI');
      movies.watchMovie('StarWars VI');
      movies.watchMovie('StarWars VI');

      actualResult = movies.favouriteMovie();
      expectedResult = 'Your favourite movie is StarWars VI and you have watched it 3 times!';

      assert.equal(expectedResult, actualResult);
    });
  });

  describe('mostStarredActor method, functionality', () => {
    it('throws a new error, if there is no watched movies yet', () => {
      throwFunc = () => movies.mostStarredActor();
      assert.throws(throwFunc, 'You have not watched a movie yet this year!');
    });

    it('returns proper message if there is a Movie Star', () => {
      movies.buyMovie('StarWars VI', ['Luck', 'Lea', 'Han']);
      movies.buyMovie('StarWars VII', ['Luck', 'Lea', 'Han', 'Rei']);
      actualResult = movies.mostStarredActor();
      expectedResult = 'The most starred actor is Luck and starred in 2 movies!';

      assert.equal(expectedResult, actualResult);
    });
  });
});