simple-tester-more-auto-indentation.js

let level = 1

const execute = (callback) => {
  level++;
  callback()
  level--;
}

const print = text => {
  console.log('  '.repeat(level) + text)
}

function describe(description, callback) {
  print(description);
  execute(callback);
}

function it(description, callback) {
  print(description);
  execute(callback);
}

function expect(left) {
  return {
    toBe(right) {
      if (left !== right) {
        print(`expected "${left}" to be "${right}"`);
      }
    },
  };
}

describe("booleans", () => {
  describe('when left is false', () => {
    it("false === false", () => {
      expect(false).toBe(true);
    });
  })
});