hsv2rgb/test.js

convert from hsv/hsb to rgb

var test = require('tape');
var hsv = require('./hsv2rgb');

var tests = [
  ['Black (#000000)'  , [  0, 0,   0], '0,0,0'],
  ['White (#FFFFFF)'  , [  0, 0, 1.0], '255,255,255'],
  ['Red (#FF0000)'    , [  0, 1, 1.0], '255,0,0'],
  ['Lime (#00FF00)'   , [120, 1, 1.0], '0,255,0'],
  ['Blue (#0000FF)'   , [240, 1, 1.0], '0,0,255'],
  ['Yellow (#FFFF00)' , [ 60, 1, 1.0], '255,255,0'],
  ['Cyan (#00FFFF)'   , [180, 1, 1.0], '0,255,255'],
  ['Magenta (#FF00FF)', [300, 1, 1.0], '255,0,255'],
  ['Silver (#C0C0C0)' , [  0, 0, .75], '192,192,192'],
  ['Gray (#808080)'   , [  0, 0, .50], '128,128,128'],
  ['Maroon (#800000)' , [  0, 1, .50], '128,0,0'],
  ['Olive (#808000)'  , [ 60, 1, .50], '128,128,0'],
  ['Green (#008000)'  , [120, 1, .50], '0,128,0'],
  ['Purple (#800080)' , [300, 1, .50], '128,0,128'],
  ['Teal (#008080)'   , [180, 1, .50], '0,128,128'],
  ['Navy (#000080)'   , [240, 1, .50], '0,0,128'],
  ['pinkish (#FF0048)', [343, 1, 1.0], '255,0,72'],
];

test('a bunch of common colors', function(t) {
  tests.forEach(function(a) {
    var rgb = hsv(a[1][0], a[1][1], a[1][2]);
    t.equal(rgb.join(','), a[2], a[0]);
  });

  t.end();
});

test('wrapping on h and clamping on s, v', function(t) {
  t.deepEqual(hsv(360 + 359, 1.0, 1.0), [255, 0, 4]);
  t.deepEqual(hsv(360 + 359, 1.0, 2.0), [255, 0, 4]);
  t.deepEqual(hsv(360 + 359, 2.0, 1.0), [255, 0, 4]);
  t.deepEqual(hsv(360 + 359, 2.0, 2.0), [255, 0, 4]);

  t.end();
});