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

import { primitivePart } from '../../../src/factor/double/primitive-part.js';


describe('primitivePart', function() {
    it('should calculate the correct primitive part of some polynomials', 
    function() {
        let p1: number[] = [];
        let p2 = [1];
        let p3 = [-10, 5, 5]; //=> pp(p3) = pp(-10x² + 5x + 5) = 2x² - 1x - 1
        let p4 = [10, 5, 5];  //=> pp(p4) = pp( 10x² + 5x + 5) = 2x² + 1x + 1
        expect(primitivePart(p1)).toEqual([]);
        expect(primitivePart(p2)).toEqual([1]);
        expect(primitivePart(p3)).toEqual([2,-1,-1]);
        expect(primitivePart(p4)).toEqual([2,1,1]);
    });
});