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

import { eSubtract } from '../../../src/basic/expansion/e-subtract.js';


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