flo-poly/__tests__/factor/double/primitive-part.spec.ts

A practical, root-focused JavaScript polynomial utility library.

import { assert, expect } from 'chai';
import { describe } from 'mocha';
import { primitivePart } from '../../../src/index.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)).to.eql([]);
		expect(primitivePart(p2)).to.eql([1]);
        expect(primitivePart(p3)).to.eql([2,-1,-1]);
        expect(primitivePart(p4)).to.eql([2,1,1]);
	});
});