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

import { subtract } from '../../../src/basic/double/subtract.js';


describe('subtract', function() {
    it('should correctly subtract some polynomials with double precision coefficients from each other', 
    function() {
        let p1 = [  2,3];
        let p2 = [4,4,4];
        let p3 = [2,1,2];
        let p4: number[] = [];
            
        expect(subtract(p1,p2)).toEqual([-4,-2,-1]);
        expect(subtract(p2,p1)).toEqual([4,2,1]);
        expect(subtract(p2,p3)).toEqual([2,3,2]);
        expect(subtract(p2,p4)).toEqual([4,4,4]);
        expect(subtract(p4,p2)).toEqual([-4,-4,-4]);
    });
});