Unit Testing 06. Payment Package Classes alternative 90/100

describe("class PaymentPackage", () => {
        it("check if create new instance", () => {
            let obj = new PaymentPackage('a', 1)
            expect(obj).to.be.an.instanceof(PaymentPackage);
            expect(obj._name).to.equal('a')
            expect(obj._value).to.equal(1)
            expect(obj._VAT).to.equal(20)
            expect(obj._active).to.be.a('boolean')
        });
        it("check for a input with one param", () => {
            expect(() =>(new PaymentPackage('a')).to.throw('Value must be a non-negative number'))
            expect(() =>(new PaymentPackage('a', 'a')).to.throw('Value must be a non-negative number'))
            expect(() =>(new PaymentPackage('a', -1)).to.throw('Value must be a non-negative number'))
            expect(() =>(new PaymentPackage(1)).to.throw('Name must be a non-empty string'))
            expect(() =>(new PaymentPackage('', 1)).to.throw('Name must be a non-empty string'))
        });
         it("check all METHODS", () => {
            let obj = new PaymentPackage('a', 10)
            expect(obj).to.have.property('name');
            expect(obj).to.have.property('value');
            expect(obj).to.have.property('VAT');
            expect(obj).to.have.property('active');
            expect(obj).to.have.property('toString');
         });
        it("check name method", () => {
                expect(() =>(new PaymentPackage.name('')).to.throw('Name must be a non-empty string'))
                expect(() =>(new PaymentPackage.name(1)).to.throw('Name must be a non-empty string'))
                expect(() =>(new PaymentPackage.name(true)).to.throw('Name must be a non-empty string'))
        });
        it("check value method", () => {
            expect(() =>(new PaymentPackage.value('')).to.throw('Value must be a non-negative number'))
            expect(() =>(new PaymentPackage.value(-1)).to.throw('Value must be a non-negative number'))
            expect(() =>(new PaymentPackage.value(true)).to.throw('Value must be a non-negative number'))
        });
        it("check VAT method", () => {
            expect(() =>(new PaymentPackage.VAT('')).to.throw('VAT must be a non-negative number'))
            expect(() =>(new PaymentPackage.VAT(-1)).to.throw('VAT must be a non-negative number'))
            expect(() =>(new PaymentPackage.VAT(true)).to.throw('VAT must be a non-negative number'))
        });
        it("check active method", () => {
            expect(() =>(new PaymentPackage.active('')).to.throw('Active status must be a boolean'))
            expect(() =>(new PaymentPackage.active(1)).to.throw('Active status must be a boolean'))
        });
        it("check toString with changes", () => {
         let obj = new PaymentPackage('a', 100)
         obj.active = false
         obj.VAT = 30
         expect(obj.toString()).to.equal('Package: a (inactive)\n- Value (excl. VAT): 100\n- Value (VAT 30%): 130');
        });
        it("check toString without changes", () => {
            let obj = new PaymentPackage('a', 100)
            expect(obj.toString()).to.equal('Package: a\n- Value (excl. VAT): 100\n- Value (VAT 20%): 120');
        });

});