import assert from 'node:assert'; import test from 'node:test'; import proj from './proj.js'; await test.describe('proj', async () => { await test('should project coordinates from EPSG:6668 to EPSG:4326', () => { const coords = [139.6917, 35.6895]; const projected = proj('EPSG:6668', 'EPSG:4326', coords); assert.deepStrictEqual(projected, [139.6917, 35.6895]); }); });