loop-grid/test/test-mover.js

An observable collection of looped event sequences shaped to a grid.

var test = require('tape')
var Mover = require('../transforms/mover')

var ObservGrid = require('observ-grid')
var ArrayGrid = require('array-grid')

test(function (t) {
  var transformedInput = null
  var releaseCalled = 0
  function transform (func, arg1, arg2) {
    var input = fakePlaybackGrid()
    transformedInput = func(input, arg1, arg2)
    t.equal(input, transformedInput)
    return function () {
      releaseCalled += 1
    }
  }

  var grid = ObservGrid([], [3, 3])
  var mover = Mover(transform)

  var endCalled = 0
  mover.start(grid, [0, 3], function () {
    endCalled += 1
  })

  t.deepEqual(transformedInput, null)

  grid.set(1, 1, true)
  t.deepEqual(transformedInput.data, [
    null, {events: [[2, true], [2.9, false]], length: 3},,
    null, {events: [[0, true], [1, false]], length: 2},,
    , {events: [[1, true], [2, false]], length: 4}
  ])

  grid.set(1, 2, true)
  t.deepEqual(transformedInput.data, [
    null, {events: [[2, true], [2.9, false]], length: 3},,
    null, {events: [[0, true], [1, false]], length: 2}, {events: [[0, true], [1, false]], length: 2},
    , {events: [[1, true], [2, false]], length: 4}, {events: [[1, true], [2, false]], length: 4}
  ])

  grid.set(1, 1, null)
  t.deepEqual(transformedInput.data, [
    null, {events: [[2, true], [2.9, false]], length: 3},,
    null, , {events: [[0, true], [1, false]], length: 2},
    , , {events: [[1, true], [2, false]], length: 4}
  ])

  t.equal(releaseCalled, 2)
  t.equal(endCalled, 0)
  mover.stop()
  t.equal(releaseCalled, 3)
  t.equal(endCalled, 1)

  t.end()

})

function fakePlaybackGrid () {
  return ArrayGrid([
    {events: [[0, true], [1, false]], length: 2}, {events: [[2, true], [2.9, false]], length: 3},,
    {events: [[1, true], [2, false]], length: 4}
  ], [3, 3])
}