describe("Testing the object library", function () {

    describe("First method tests", function () {

        it("Should have an input like this: (string, number)", function () {

            expect(() => library.calcPriceOfBook(123, 1978)).to.throw("Invalid input");

            expect(() => library.calcPriceOfBook('dass', 'das')).to.throw("Invalid input");

            expect(() => library.calcPriceOfBook(123, 'das')).to.throw("Invalid input");

            expect(() => library.calcPriceOfBook('asda', 1988.12)).to.throw("Invalid input");

        });


        it('Should calculate the price depending on the year', () => {

            let returnValue = library.calcPriceOfBook('War and Peace', 1990);

            let returnValue2 = library.calcPriceOfBook('War and Peace', 1970);

            expect(returnValue).to.equal('Price of War and Peace is 20.00');

            expect(returnValue2).to.equal('Price of War and Peace is 10.00');

        });

    });


    describe('Second method', () => {

        it('Should include all books in library', () => {



        });


        it('Should return proper strings', () => {

            let returnValue = library.findBook(['some', 'troy'], 'some');

            let returnValue2 = library.findBook(['some', 'troy'], 'dasda');

            expect(returnValue).to.equal('We found the book you want.');

            expect(returnValue2).to.equal('The book you are looking for is not here!');

        });


        it('Should check the length of the array', () => {

            expect(() => library.findBook([], 'some')).to.throw("No books currently available");

        });

    });


    describe('Third method', () => {

        it('Should have a positive integer as a parameter', () => {

            expect(() => library.arrangeTheBooks(-12)).to.throw("Invalid input");

            expect(() => library.arrangeTheBooks(1.54)).to.throw("Invalid input");

        });


        it('Should check the space for the books', () => {

            expect(library.arrangeTheBooks(40)).to.equal('Great job, the books are arranged.');

            expect(library.arrangeTheBooks(41)).to.equal('Insufficient space, more shelves need to be purchased.');

        });

    });


});