import { describe, expect, it } from '@jest/globals';

import { multiplyByConst } from '../../../src/basic/double/multiply-by-const.js';


describe('multiplyByConst', function() {
    it('should correctly multiply some polynomials with double precision coefficients by a constant', 
    function() {
        let p1: number[] = [];
        let p2 = [1.1,2.2,3.3,4.4];
        expect(multiplyByConst(2,p1)).toEqual([]);
        expect(multiplyByConst(2,p2)).toEqual([2.2,4.4,6.6,8.8]);
    });
    
    
    it('should return the zero polynomial if the polynomial was multiplied by 0', 
    function() {
        let p1 = [1.1,2.2,3.3,4.4];
        expect(multiplyByConst(0,p1)).toEqual([]);
    });
});