cli-mandelbrot/src/test/lib/iterationsToEscape.spec.js

A command line viewer of the Mandelbrot set

'use strict'

import test from 'ava'
import iterationsToEscape from '../../main/lib/iterationsToEscape.js'

const undefinedPoints = [ { x: 0, y: 0 }, { x: -1.32, y: 0.04 }, { x: -0.12, y: 0.12 } ]
const pointsByIndex = [
  [ { x: 2, y: 2 }, { x: 1.84, y: -1 }, { x: 1.6, y: 1.96 } ],
  [ { x: 1, y: 1 }, { x: 0.56, y: 1.12 }, { x: 0, y: -1.52 } ],
  [ { x: 0.7, y: 0.7 }, { x: 0.6, y: 0.76 }, { x: -0.16, y: 1.2 } ],
  [ { x: 0.55, y: 0.55 }, { x: 0.32, y: -0.92 }, { x: -1, y: -0.72 } ],
  [ { x: 0.5, y: 0.5 }, { x: -1.44, y: 0.32 }, { x: -0.92, y: -0.56 } ],
  [ { x: 0.45, y: 0.45 }, { x: -1.64, y: 0.12 }, { x: -0.72, y: -0.64 } ],
  [ { x: 0.43, y: 0.43 }, { x: -0.2, y: -1.04 }, { x: 0.2, y: -0.68 } ],
  [ { x: 0.42, y: 0.42 }, { x: -0.36, y: -0.72 }, { x: 0.36, y: 0.04 } ],
  [ { x: 0.40, y: 0.40 }, { x: 0.32, y: 0.64 }, { x: -0.76, y: 0.36 } ],
  [ { x: 0.399, y: 0.399 }, { x: 0.44, y: 0.2 }, { x: 0.44, y: -0.2 } ],
  [ { x: 0.393, y: 0.393 }, { x: -0.28, y: -0.76 }, { x: -0.28, y: 0.76 } ]
]

undefinedPoints.forEach(point => {
  test(`iterationsToEscape should return undefined for [${point.x},${point.y}]`, t => {
    t.deepEqual(iterationsToEscape(point.x, point.y, 10), undefined)
  })
})

pointsByIndex.forEach((points, value) => {
  points.forEach(point => {
    test(`iterationsToEscape should return ${value} for [${point.x},${point.y}]`, t => {
      t.deepEqual(iterationsToEscape(point.x, point.y, 10), value)
    })
  })
})