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

import { bPrimitivePart } from '../../../src/factor/bigint/b-primitive-part.js';


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