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Diffstat (limited to 'node_modules/chroma-js/test/apha-test.coffee')
| -rw-r--r-- | node_modules/chroma-js/test/apha-test.coffee | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/node_modules/chroma-js/test/apha-test.coffee b/node_modules/chroma-js/test/apha-test.coffee new file mode 100644 index 0000000000..a2020dca20 --- /dev/null +++ b/node_modules/chroma-js/test/apha-test.coffee @@ -0,0 +1,64 @@ +require 'es6-shim' +vows = require 'vows' +assert = require 'assert' +chroma = require '../chroma' + + +vows + .describe('Tests for the alpha channel') + + .addBatch + + 'setting & getting alpha channel': + topic: -> chroma 'red' + 'default alpha is 1': (topic) -> assert.equal topic.alpha(), 1 + 'setting alpha to 0.5': (topic) -> assert.equal topic.alpha(0.5), topic + 'alpha is now 0.5': (topic) -> assert.equal topic.alpha(), 0.5 + + 'interpolating alpha channel': + topic: -> chroma.mix chroma.color('white').alpha(0), chroma.color('black').alpha(1), 0.3 + 'color is grey': (topic) -> assert.equal topic.hex(), '#b2b2b2' + 'alpha is 50%': (topic) -> assert.equal topic.alpha(), 0.3 + + 'constructing rgba color': + topic: -> new chroma 255,0,0,0.5,'rgb' + 'alpha is 50%': (topic) -> assert.equal topic.alpha(), 0.5 + + 'constructing rgba color, rgb shorthand': + topic: -> chroma.rgb(255,0,0,0.5) + 'alpha is 50%': (topic) -> assert.equal topic.alpha(), 0.5 + + 'constructing rgba color, hsl shorthand': + topic: -> chroma.hsl 0,1,0.5,0.5 + 'color is red': (topic) -> assert.equal topic.name(), 'red' + 'alpha is 50%': (topic) -> assert.equal topic.alpha(), 0.5 + + 'parsing rgba colors': + topic: -> chroma.css 'rgba(255,0,0,.3)' + 'color is red': (topic) -> assert.equal topic.name(), 'red' + 'alpha is 30%': (topic) -> assert.equal topic.alpha(), 0.3 + 'rgba output': (topic) -> assert.deepEqual topic.rgba(), [255,0,0,0.3] + + 'parsing rgba colors (percentage)': + topic: -> chroma.css 'rgba(100%,0%,0%,0.2)' + 'color is red': (topic) -> assert.equal topic.name(), 'red' + 'alpha is 20%': (topic) -> assert.equal topic.alpha(), 0.2 + 'rgb output': (topic) -> assert.deepEqual topic.rgb(), [255,0,0] + 'rgba output': (topic) -> assert.deepEqual topic.rgba(), [255,0,0,0.2] + + 'parsing hsla colors': + topic: -> chroma.css 'hsla(0,100%,50%,0.25)' + 'color is red': (topic) -> assert.equal topic.name(), 'red' + 'alpha is 25%': (topic) -> assert.equal topic.alpha(), 0.25 + 'rgb output': (topic) -> assert.deepEqual topic.rgb(), [255,0,0] + 'rgba output': (topic) -> assert.deepEqual topic.rgba(), [255,0,0,0.25] + + 'gl output': + topic: -> chroma.gl 1, 0, 0, 0.25 + 'gloutput': (topic) -> assert.deepEqual topic.gl(), [1, 0, 0, 0.25] + + 'rgba css output': + topic: -> chroma.css 'hsla(0,100%,50%,0.25)' + 'cssoutput': -> (topic) -> assert.equal topic.css(), 'rgba(255,0,0,0.25)' + + .export(module)
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