data-fns/src/lib/cellularAutomata.test.ts

This library provides utility functions for working with array data that are useful in many contexts, including creative coding. It offers generic functions that perform common operations such as offsetting an array, generating an array based on a callbac

import { cellularAutomata } from './cellularAutomata'
import { generateSequence } from './generateSequence'

describe('cellularAutomata', () => {
  it('returns the expected sequence for the default ruleset', () => {
    const sequence = [0, 0, 0, 0, 1, 0, 0, 0]

    expect(generateSequence(10, sequence, cellularAutomata)).toEqual([
      [0, 0, 0, 0, 1, 0, 0, 0],
      [0, 0, 0, 1, 1, 1, 0, 0],
      [0, 0, 1, 1, 0, 0, 1, 0],
      [0, 1, 1, 0, 1, 1, 1, 1],
      [0, 1, 0, 0, 1, 0, 0, 0],
      [1, 1, 1, 1, 1, 1, 0, 0],
      [1, 0, 0, 0, 0, 0, 1, 1],
      [0, 1, 0, 0, 0, 1, 1, 0],
      [1, 1, 1, 0, 1, 1, 0, 1],
      [0, 0, 0, 0, 1, 0, 0, 1],
    ])
  })

  it('should return a sequence of alternating 0s and 1s when given a sequence of alternating 0s and 1s', () => {
    const sequence = [0, 1, 0, 1, 0, 1]

    expect(cellularAutomata(sequence)).toEqual([0, 1, 0, 1, 0, 1])
  })

  it('should return an empty sequence when given an empty sequence', () => {
    const sequence: Array<number> = []
    expect(cellularAutomata(sequence)).toEqual(sequence)
  })
})