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assert = require 'assert'
husl = require '../husl.coffee'
meta = require '../package.json'
snapshot = require './snapshot.coffee'
_ = require 'underscore'
describe 'HUSL consistency', ->
manySamples = (assertion) ->
samples = '0123456789abcdef'
for r in samples
for g in samples
for b in samples
assertion '#' + r + r + g + g + b + b
it 'should convert between HUSL and hex', ->
manySamples (hex) ->
assert.deepEqual hex, husl.toHex (husl.fromHex hex)...
it 'should convert between HUSLp and hex', ->
manySamples (hex) ->
assert.deepEqual hex, husl.p.toHex (husl.p.fromHex hex)...
rgbRangeTolerance = 0.00000000001
snapshotTolerance = 0.00000000001
describe 'Fits within RGB ranges', ->
it 'should fit', ->
for H in (n for n in [0..360] by 5)
for S in (n for n in [0..100] by 5)
for L in (n for n in [0..100] by 5)
RGB = husl.toRGB H, S, L
for channel in RGB
assert -rgbRangeTolerance <= channel <= 1 + rgbRangeTolerance, "HUSL: #{[H, S, L]} -> #{RGB}"
RGB = husl.p.toRGB H, S, L
for channel in RGB
assert -rgbRangeTolerance <= channel <= 1 + rgbRangeTolerance, "HUSLp: #{[H, S, L]} -> #{RGB}"
describe 'HUSL snapshot', ->
it 'should match the stable snapshot', ->
@timeout 10000
current = snapshot.snapshot()
stable = require './snapshot-rev4.json'
for hex, stableSamples of stable
currentSamples = current[hex]
for tag, stableTuple of stableSamples
currentTuple = currentSamples[tag]
for i in [0..2]
diff = Math.abs currentTuple[i] - stableTuple[i]
assert (diff < snapshotTolerance), """
The snapshots for #{hex} don't match at #{tag}
Stable: #{stableTuple}
Current: #{currentTuple}
"""
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