mathjslab/src/MultiArray.spec.ts

MathJSLab - An interpreter with language syntax like MATLAB®/Octave, ISBN 978-65-00-82338-7.

import path from 'node:path';
import { ComplexDecimal } from './ComplexDecimal';
import { Evaluator } from './Evaluator';
import { MultiArray } from './MultiArray';

let evaluator: Evaluator;

const __filenameMatch = __filename.match(new RegExp(`.*\\${path.sep}([^\\${path.sep}]+)\\.spec\\.([cm]?[jt]s)\$`))!;
const unitName = __filenameMatch[1];
const testExtension = __filenameMatch[2];

describe(`${unitName} unit test (.${testExtension} test file).`, () => {
    beforeEach(async () => {
        evaluator = new Evaluator();
    });

    it('ComplexDecimal should be defined', () => {
        expect(ComplexDecimal).toBeDefined();
    });

    it('MultiArray should be defined', () => {
        expect(MultiArray).toBeDefined();
    }, 100);

    it('Evaluator should be defined', () => {
        expect(Evaluator).toBeDefined();
    }, 100);

    it('The determinant must be correctly calculated', () => {
        let tree: any;
        let value: any;
        tree = evaluator.Parse('det([1:3;4:6;7:9])');
        value = evaluator.Evaluate(tree);
        expect(value.list[0].re.toNumber()).toBe(0);
        tree = evaluator.Parse('det([2,1,-3; 3,2,4; 2,5,-2])');
        value = evaluator.Evaluate(tree);
        expect(value.list[0].re.toNumber()).toBe(-67);
        tree = evaluator.Parse('det([-7,6,3,1; -9,1,6,4; -8,-4,3,6; -5,5,9,2])');
        value = evaluator.Evaluate(tree);
        expect(value.list[0].re.toNumber()).toBe(-444);
    }, 1000);
});