enhancedmath/lib/__tests__/matrix_determinant.test.js

This package contains some enhanced mathematical operations

import { describe, expect, test } from 'vitest';
import determinant from '../Matrix/determinant';
describe('Matrix Determinant', () => {
    test('should return the only value in a 1x1 matrix', () => {
        const matrix = [[5]];
        const result = determinant(matrix);
        expect(result).toBe(5);
    });
    test('should return the determinant of a 2x2 matrix', () => {
        const matrix = [
            [1, 2],
            [3, 4],
        ];
        const result = determinant(matrix);
        expect(result).toBe(-2);
    });
    test('should return the determinant for a 3x3 matrix', () => {
        const matrix = [
            [1, 2, 3],
            [4, 5, 6],
            [7, 8, 9],
        ];
        const result = determinant(matrix);
        expect(result).toBe(0);
    });
    test('should return the determinant for a 3x3 matrix', () => {
        const matrix = [
            [4, 0, 3],
            [4, 5, 2],
            [7, 1, 9],
        ];
        const result = determinant(matrix);
        expect(result).toBe(79);
    });
    test('should return the determinant for a 4x4 matrix', () => {
        const matrix = [
            [2, 9, 1, 4],
            [3, 7, 3, 8],
            [6, 9, 3, 2],
            [1, 7, 9, 5],
        ];
        const result = determinant(matrix);
        expect(result).toBe(-1630);
    });
    test('should return the determinant for a 4x4 matrix', () => {
        const matrix = [
            [7, 7, 9, 6, 2],
            [1, 7, 4, 8, 7],
            [6, 4, 6, 8, 9],
            [3, 2, 5, 4, 6],
            [4, 1, 2, 3, 9],
        ];
        const result = determinant(matrix);
        expect(result).toBe(-2849);
    });
    test('should return undefined for a non-square matrix', () => {
        const matrix = [
            [1, 2, 3],
            [4, 5, 6],
        ];
        const result = determinant(matrix);
        expect(result).toBeUndefined();
    });
});