85 lines
1.8 KiB
JavaScript
85 lines
1.8 KiB
JavaScript
var colormap = require('.'),
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test = require('tape');
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test('is object - object', function(t) {
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t.plan(1);
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var n = 15,
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cg,
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check = true;
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// Display all the colormaps
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var cms = ['jet', 'hsv' ,'hot', 'cool', 'spring', 'summer', 'autumn',
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'winter', 'greys', 'bone', 'copper'];
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for (var i = 0; i < cms.length; i++) {
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cg = colormap({'colormap': cms[i], 'nshades': n });
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check = check & (cg.length == n);
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}
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t.ok(check);
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});
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test('alpha config creates rgba arrays with correct alpha', function (t) {
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var alpha = 0.5;
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var rgba = colormap({
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colormap: 'greys',
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format: 'rgba',
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alpha: alpha
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});
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var firstRgba = rgba[0];
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var lastRgba = rgba[rgba.length - 1];
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t.equal(firstRgba[3], alpha);
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t.equal(lastRgba[3], alpha);
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t.end();
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});
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test('user colormap alpha values override alpha config', function (t) {
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var alphaconfig = 0.8;
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var alpha = 0.5;
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var map = [
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{index:0, rgb:[0, 0, 0, alpha]},
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{index:1, rgb:[255, 255, 255, alpha]}
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];
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var rgba = colormap({
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colormap: map,
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alpha: [alphaconfig, alphaconfig],
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format: 'rgba'
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});
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var firstRgba = rgba[0];
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var lastRgba = rgba[rgba.length - 1];
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t.equal(firstRgba[3], alpha);
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t.equal(lastRgba[3], alpha);
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t.end();
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});
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test('alphamap values are computed independently between runs', function(t) {
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var blueRed = colormap({
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colormap: "bluered",
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format: "rgba",
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alpha: [0, 1]
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});
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var blueRed2 = colormap({
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colormap: "bluered",
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format: "rgba",
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alpha: [0, 0.5]
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});
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t.same(blueRed[blueRed.length - 1], [ 255, 0, 0, 1 ]);
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t.same(blueRed2[blueRed2.length - 1], [ 255, 0, 0, 0.5 ]);
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t.end();
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});
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