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Diffstat (limited to 'node_modules/chroma-js/test/luminance-test.coffee')
| -rw-r--r-- | node_modules/chroma-js/test/luminance-test.coffee | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/node_modules/chroma-js/test/luminance-test.coffee b/node_modules/chroma-js/test/luminance-test.coffee new file mode 100644 index 0000000000..a6709a2771 --- /dev/null +++ b/node_modules/chroma-js/test/luminance-test.coffee @@ -0,0 +1,60 @@ +require 'es6-shim' +vows = require 'vows' +assert = require 'assert' +chroma = require '../chroma' + + +rnd = (f,d) -> + d = Math.pow(10,d) + Math.round(f*d) / d + +vows + .describe('Testing relative luminance') + + .addBatch + + 'black': + topic: -> chroma.color 'black' + 'lum = 0': (topic) -> assert.equal topic.luminance(), 0 + + 'white': + topic: -> chroma.color 'white' + 'lum = 1': (topic) -> assert.equal topic.luminance(), 1 + + 'red': + topic: -> chroma.color 'red' + 'lum = 0.21': (topic) -> assert.equal topic.luminance(), 0.2126 + + 'yellow brighter than blue': + topic: -> [chroma.color('yellow').luminance(), chroma.color('blue').luminance()] + 'yellow > blue': (topic) -> assert topic[0] > topic[1] + + 'green darker than red': + topic: -> [chroma.color('green').luminance(), chroma.color('red').luminance()] + 'green < red': (topic) -> assert topic[0] < topic[1] + + # setting luminance + 'set red luminance to 0.4': + topic: -> chroma.color('red').luminance 0.4 + 'lum = 0.4': (topic) -> assert.equal rnd(topic.luminance(),3), 0.4 + + # setting luminance + 'set red luminance to 0': + topic: -> chroma.color('red').luminance 0 + 'lum = 0': (topic) -> assert.equal rnd(topic.luminance(),2), 0 + 'hex = #000': (topic) -> assert.equal topic.hex(), '#000000' + + # setting luminance + 'set black luminance to 0.5': + topic: -> chroma.color('black').luminance 0.5 + 'lum = 0.5': (topic) -> assert.equal rnd(topic.luminance(),2), 0.5 + 'hex = #999': (topic) -> assert.equal '#bbbbbb', topic.hex() + + # setting luminance + 'set black luminance to 0.5 (lab)': + topic: -> chroma.color('black').luminance 0.5, 'lab' + 'lum = 0.5': (topic) -> assert.equal rnd(topic.luminance(),2), 0.5 + 'hex = #999': (topic) -> assert.equal '#bbbbbb', topic.hex() + + + .export(module)
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