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require 'es6-shim'
vows = require 'vows'
assert = require 'assert'
chroma = require '../chroma'
vows
.describe('Some tests for chroma.scale()')
.addBatch
'simple rgb scale (white-->black)':
topic: -> chroma.scale ['white','black']
'starts white': (topic) -> assert.equal topic(0).hex(), '#ffffff'
'mid gray': (topic) -> assert.equal topic(0.5).hex(), '#7f7f7f'
'ends black': (topic) -> assert.equal topic(1).hex(), '#000000'
'simple hsv scale (white-->black)':
topic: -> chroma.scale(['white','black']).mode('hsv')
'starts white': (topic) -> assert.equal topic(0).hex(), '#ffffff'
'mid gray': (topic) -> assert.equal topic(0.5).hex(), '#808080'
'ends black': (topic) -> assert.equal topic(1).hex(), '#000000'
'colors': (topic) -> assert.deepEqual topic.colors(), ['#ffffff', '#000000']
'simple hsv scale (white-->black), classified':
topic: -> chroma.scale(['white','black']).domain([0, 1], 7).mode('hsv')
'starts white': (topic) -> assert.equal topic(0).hex(), '#ffffff'
'mid gray': (topic) -> assert.equal topic(0.5).hex(), '#808080'
'ends black': (topic) -> assert.equal topic(1).hex(), '#000000'
'colors': (topic) -> assert.deepEqual topic.colors(), ['#ffffff', '#d5d5d5', '#aaaaaa', '#808080', '#555555', '#2a2a2a', '#000000']
'simple lab scale (white-->black)':
topic: -> chroma.scale(['white','black']).mode('lab')
'starts white': (topic) -> assert.equal topic(0).hex(), '#ffffff'
'mid gray': (topic) -> assert.equal topic(0.5).hex(), '#777777'
'ends black': (topic) -> assert.equal topic(1).hex(), '#000000'
'colorbrewer scale':
topic: -> chroma.scale 'RdYlGn'
'starts white': (topic) -> assert.equal topic(0).hex(), '#a50026'
'mid gray': (topic) -> assert.equal topic(0.5).hex(), '#ffffbf'
'ends black': (topic) -> assert.equal topic(1).hex(), '#006837'
'colorbrewer scale - domained':
topic: -> chroma.scale('RdYlGn').domain([0, 100])
'starts white': (topic) -> assert.equal topic(0).hex(), '#a50026'
'foo': (topic) -> assert.notEqual topic(10).hex(), '#ffffbf'
'mid gray': (topic) -> assert.equal topic(50).hex(), '#ffffbf'
'ends black': (topic) -> assert.equal topic(100).hex(), '#006837'
'colorbrewer scale - domained - classified':
topic: -> chroma.scale('RdYlGn').domain([0, 100], 5)
'starts white': (topic) -> assert.equal topic(0).hex(), '#a50026'
'10': (topic) -> assert.equal topic(10).hex(), '#a50026'
'mid gray': (topic) -> assert.equal topic(50).hex(), '#ffffbf'
'ends black': (topic) -> assert.equal topic(100).hex(), '#006837'
'get colors': (topic) -> assert.deepEqual topic.colors(), ['#a50026', '#f88d52', '#ffffbf', '#86cb66', '#006837']
'calling domain with no arguments':
topic: -> chroma.scale('RdYlGn').domain([0, 100], 5)
'returns domain': (topic) -> assert.deepEqual topic.domain(), [0, 20, 40, 60, 80, 100]
# 'check spread':
# topic: ->
# cs = new chroma._ColorScale()
# cs.domain [0, 0.5, 1]
# cs
# 'spread zero': (cs) ->
# assert.equal cs.classifyValue(0.25), 0.25
# assert.equal cs.classifyValue(0.75), 0.75
# 'spread one': (cs) ->
# cs._spread = 1
# assert.equal cs.classifyValue(0.25), 0
# assert.equal cs.classifyValue(0.75), 1
# #assert.deepEqual res, [0.33, 0.33, 0.33, 0.33, 0.80, 100]
'source array keeps untouched':
topic: chroma.brewer.Blues.slice(0)
'colors are an array': (colors) ->
assert.equal colors.length, 9
'colors are strings': (colors) ->
assert.equal typeof colors[0], 'string'
'creating a color scale': (colors) ->
chroma.scale(colors)
assert true
'colors are still strings': (colors) ->
assert.equal typeof colors[0], 'string'
'domain with same min and max':
topic: -> chroma.scale(['white','black']).domain([1, 1], 5)
'returns color': (topic) -> assert.deepEqual topic(1).hex(), '#000000'
# 'fixed color scale':
# topic: ->
# cs = new chroma.ColorScale()
# cs.range ['white', 'black']
# cs.domain [0, 0.5, 0.75, 1]
# cs
# 'returns domain': (topic) -> assert.deepEqual topic.domain(), [0, 20, 40, 60, 80, 100]
.export(module)
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