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Diffstat (limited to 'node_modules/chroma-js/test/scales-test.coffee')
| -rw-r--r-- | node_modules/chroma-js/test/scales-test.coffee | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/node_modules/chroma-js/test/scales-test.coffee b/node_modules/chroma-js/test/scales-test.coffee new file mode 100644 index 0000000000..3f0e93bd58 --- /dev/null +++ b/node_modules/chroma-js/test/scales-test.coffee @@ -0,0 +1,102 @@ +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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