test.js

const assert = require("assert");

function describe(testcase, callback) {
  console.log(testcase);
  callback();
}

function it(description, callback) {
  try {
    callback();
    console.log(`\t ✓ ${description}`);
  } catch (e) {
    console.log(`\t x ${description}`);
  }
}

function expect(actual) {
  return {
    toEqual(expected) {
      assert.equal(actual, expected);
    },
    toBe(expected) {
      assert.deepStrictEqual(actual, expected);
    },
    toBeTruthy() {
      assert.ok(actual);
    },
    toHaveLength(expected) {
      assert.ok(actual.length === expected);
    }
  };
}

module.exports = {
  describe,
  expect,
  it
};