GameOfLife_spec.ts

import should from 'should';
import GameOfLife, { Cell } from '../../src/GameOfLife';

// 1. Any live cell with fewer than two live neighbours dies, as if caused by underpopulation.
// 2. Any live cell with more than three live neighbours dies, as if by overcrowding.
// 3. Any live cell with two or three live neighbours lives on to the next generation.
// 4. Any dead cell with exactly three live neighbours becomes a live cell.


describe('GameOfLife', () => {
  it('needs to be defined', () => {
    const gameOfLife = new GameOfLife();
    should(gameOfLife).not.be.undefined()
  })

  it('Any live cell with fewer than two live neighbours dies, as if caused by underpopulation', () => {
    const cell = new Cell(1)
    const cellStatus = cell.getNextStatus(1)
    should(cellStatus).be.equal(0)
  })

  it('Any live cell with more than three live neighbours dies, as if by overcrowding.', () => {
    const cell = new Cell(1)
    const cellStatus = cell.getNextStatus(4)
    should(cellStatus).be.equal(0)
  })

  it('Any live cell with two lives neighbours on to the next generation.', () => {
    const cell = new Cell(1)
    const cellStatus = cell.getNextStatus(2)
    should(cellStatus).be.equal(1)
  })

  it('Any live cell with three lives neighbours on to the next generation.', () => {
    const cell = new Cell(1)
    const cellStatus = cell.getNextStatus(3)
    should(cellStatus).be.equal(1)
  })

  it('Any dead cell with exactly three live neighbours becomes a live cell.', () => {
    const cell = new Cell(0)
    const cellStatus = cell.getNextStatus(3)
    should(cellStatus).be.equal(1)
  })
})