ds-algo-study/DS-n-Algos/_Extra-Practice/matrix/test.js

Just experimenting with publishing a package

const matrix = require('./index');

test('matrix is a function', () => {
  expect(typeof matrix).toEqual('function');
});

test('matrix produces a 2x2 array', () => {
  const m = matrix(2);
  expect(m.length).toEqual(2);
  expect(m[0]).toEqual([1, 2]);
  expect(m[1]).toEqual([4, 3]);
});

test('matrix produces a 3x3 array', () => {
  const m = matrix(3);
  expect(m.length).toEqual(3);
  expect(m[0]).toEqual([1, 2, 3]);
  expect(m[1]).toEqual([8, 9, 4]);
  expect(m[2]).toEqual([7, 6, 5]);
});

test('matrix produces a 4x4 array', () => {
  const m = matrix(4);
  expect(m.length).toEqual(4);
  expect(m[0]).toEqual([1, 2, 3, 4]);
  expect(m[1]).toEqual([12, 13, 14, 5]);
  expect(m[2]).toEqual([11, 16, 15, 6]);
  expect(m[3]).toEqual([10, 9, 8, 7]);
});