christmas movies - js advanced exam

describe('tests at ChristamsMovie class', function () {
  let cm;
  this.beforeEach(function () {
    cm = new ChristmasMovies();
  });
  describe('tests all initial properties', function () {
    //test 1
    it('Instantiation with no parameters', function () {
      expect(cm.movieCollection).to.eql([]);
      expect(cm.movieCollection.length).to.deep.equal(0);
      expect(cm.watched).to.eql({});
      expect(cm.actors).to.deep.equal([]);
      expect(cm.actors.length).to.deep.equal(0);
    });
  });

  describe('tests function buyMovie', function () {
    // test 2
    it('should return added corectly a movie', function () {
      expect(
        cm.buyMovie('Last Christmas', [
          'Madison Ingoldsby',
          'Emma Thompson',
          'Boris Isakovic',
          'Madison Ingoldsby',
        ])
      ).to.equal(
        'You just got Last Christmas to your collection in which Madison Ingoldsby, Emma Thompson, Boris Isakovic are taking part!'
      );
    });

    it('should thrown error that exist a movie name', function () {
      cm.buyMovie('Last Christmas', [
        'Madison Ingoldsby',
        'Emma Thompson',
        'Boris Isakovic',
        'Madison Ingoldsby',
      ]);
      expect(() =>
        cm.buyMovie('Last Christmas', [
          'Madison Ingoldsby',
          'Emma Thompson',
          'Boris Isakovic',
          'Madison Ingoldsby',
        ])
      ).to.throw(Error, 'You already own Last Christmas in your collection!');
    });
  });

  describe('tests function discardMovie', function () {
    it('should throw error that no exist movie name', function () {
      expect(() => cm.discardMovie('The Grunch')).to.throw(
        Error,
        'The Grunch is not at your collection!'
      );
    });

    it('should throw error that no exist movie watch', function () {
      cm.buyMovie('Last Christmas', [
        'Madison Ingoldsby',
        'Emma Thompson',
        'Boris Isakovic',
        'Madison Ingoldsby',
      ]);
      expect(() => cm.discardMovie('Last Christmas')).to.throw(
        Error,
        'Last Christmas is not watched!'
      );
    });

    it('should return message that correctly remove a movie', function () {
      cm.buyMovie('Last Christmas', [
        'Madison Ingoldsby',
        'Emma Thompson',
        'Boris Isakovic',
        'Madison Ingoldsby',
      ]);
      cm.watchMovie('Last Christmas');
      expect(cm.discardMovie('Last Christmas')).to.equal(
        'You just threw away Last Christmas!'
      );
    });
  });

  describe('tests function watchMovie', function () {
    it('should throw error that no exist in collection list this a movie name', function () {
      expect(() => cm.watchMovie('The Grunch')).to.throw(
        Error,
        'No such movie in your collection!'
      );
    });

    it('should return three watched a movie', function () {
      cm.buyMovie('Last Christmas', [
        'Madison Ingoldsby',
        'Emma Thompson',
        'Boris Isakovic',
        'Madison Ingoldsby',
      ]);
      cm.watchMovie('Last Christmas');
      cm.watchMovie('Last Christmas');
      cm.watchMovie('Last Christmas');
      expect(cm.watched['Last Christmas']).to.deep.equal(3);
    });
  });

  describe('tests function favouriteMovie', function () {
    it('should thtow error that empty watched collection', function () {
      expect(() => cm.favouriteMovie()).to.throw(
        Error,
        'You have not watched a movie yet this year!'
      );
    });

    it('should return a movie with the most watched', function () {
      cm.buyMovie('Last Christmas', [
        'Madison Ingoldsby',
        'Emma Thompson',
        'Boris Isakovic',
        'Madison Ingoldsby',
      ]);
      cm.buyMovie('Home Alone', [
        'Macaulay Culkin',
        'Joe Pesci',
        'Daniel Stern',
      ]);
      cm.watchMovie('Last Christmas');
      cm.watchMovie('Last Christmas');
      cm.watchMovie('Last Christmas');
      cm.watchMovie('Home Alone');
      expect(cm.favouriteMovie()).to.equal(
        'Your favourite movie is Last Christmas and you have watched it 3 times!'
      );
    });
  });

  describe('tests function mostStarredActors', function () {
    //test 11
    it('should throw error that empty movieCollection', function () {
      expect(() => cm.mostStarredActor()).to.throw(
        Error,
        'You have not watched a movie yet this year!'
      );
    });
    //test 10
    it('should return the most played actor  in the movies', function () {
      cm.buyMovie('Home Alone', [
        'Macaulay Culkin',
        'Joe Pesci',
        'Daniel Stern',
      ]);
      cm.buyMovie('Last Christmas', [
        'Madison Ingoldsby',
        'Emma Thompson',
        'Boris Isakovic',
        'Madison Ingoldsby',
      ]);
      cm.buyMovie('Home Alone 2', ['Macaulay Culkin']);
      cm.buyMovie('Home Alone 3', ['Macaulay Culkin', 'Emma Thompson']);
      cm.watchMovie('Home Alone');
      expect(cm.mostStarredActor()).to.equal(
        'The most starred actor is Macaulay Culkin and starred in 3 movies!'
      );
    });
  });

    });