describe('rgb to hex', () => {

    it('Should take three integer numbers', () => {

        let returnValue = rgbToHexColor(22, 12, 3);

        expect(returnValue).to.be.an('string');

    });


    it('Should return undefined', () => {

        let returnValue = rgbToHexColor('22', 12, 3);

        expect(returnValue).to.be.undefined;

    });


    it('Should return undefined one', () => {

        let returnValue = rgbToHexColor();

        expect(returnValue).to.be.undefined;

    });


    it('Should return undefined two', () => {

        let returnValue = rgbToHexColor(12, 22);

        expect(returnValue).to.be.undefined;

    });


    it('Should return undefined three', () => {

        let returnValue = rgbToHexColor('sasdasd');

        expect(returnValue).to.be.undefined;

    });


    it('Should return undefined four', () => {

        let returnValue = rgbToHexColor(-2, 22, 12);

        expect(returnValue).to.be.undefined;

    });


    it('Should return undefined five', () => {

        let returnValue = rgbToHexColor(342, 22, 12);

        expect(returnValue).to.be.undefined;

    });


    it('Should be in hexadecimal format', () => {

        let returnValue = rgbToHexColor(32, 22, 12);

       expect(/^#[0-9A-F]{6}$/i.test(returnValue)).to.be.true;

    });




  });