color.test.js

"use strict";

var mapnik = require('../');
var assert = require('assert');

describe('mapnik.Color', function() {
    it('should throw with invalid usage', function() {
        // no 'new' keyword
        assert.throws(function() { mapnik.Color(); });
        // invalid args
        assert.throws(function() { new mapnik.Color(); });
        assert.throws(function() { new mapnik.Color(1); });
        assert.throws(function() { new mapnik.Color('foo'); });
        assert.throws(function() { new mapnik.Color(-1,0,0); });
        assert.throws(function() { new mapnik.Color(256,0,0); });
        assert.throws(function() { new mapnik.Color(256,0,0,true); });
        assert.throws(function() { new mapnik.Color(0,0,0,-1); });
        assert.throws(function() { new mapnik.Color(0,0,0,-1,true); });
    });

    it('should throw for invalid property setting', function() {
        var c = new mapnik.Color('green');
        assert.throws(function() { c.g = -1; });
        assert.throws(function() { c.r = 256; });
        assert.throws(function() { c.b = 'waffle'; });
        assert.throws(function() { c.a = null; });
        assert.throws(function() { c.premultiplied = null; });
        assert.throws(function() { c.premultiplied = 1.0; });
        assert.throws(function() { c.premultiplied = 'true'; });
    });

    it('should be green via keyword', function() {
        var c = new mapnik.Color('green');
        assert.equal(c.r, 0);
        assert.equal(c.g, 128);
        assert.equal(c.b, 0);
        assert.equal(c.a, 255);
        assert.equal(c.hex(), '#008000');
        assert.equal(c.premultiplied, false);
        assert.equal(c.toString(), 'rgb(0,128,0)');
        var c = new mapnik.Color('green', true);
        assert.equal(c.r, 0);
        assert.equal(c.g, 128);
        assert.equal(c.b, 0);
        assert.equal(c.a, 255);
        assert.equal(c.hex(), '#008000');
        assert.equal(c.premultiplied, true);
        assert.equal(c.toString(), 'rgb(0,128,0)');
    });

    it('should be gray via rgb', function() {
        var c = new mapnik.Color(0, 128, 0);
        assert.equal(c.r, 0);
        assert.equal(c.g, 128);
        assert.equal(c.b, 0);
        assert.equal(c.a, 255);
        assert.equal(c.premultiplied, false);
        assert.equal(c.hex(), '#008000');
        assert.equal(c.toString(), 'rgb(0,128,0)');
        var c = new mapnik.Color(0, 128, 0, true);
        assert.equal(c.r, 0);
        assert.equal(c.g, 128);
        assert.equal(c.b, 0);
        assert.equal(c.a, 255);
        assert.equal(c.premultiplied, true);
        assert.equal(c.hex(), '#008000');
        assert.equal(c.toString(), 'rgb(0,128,0)');
    });

    it('should be gray via rgba', function() {
        var c = new mapnik.Color(0, 128, 0, 255);
        assert.equal(c.r, 0);
        assert.equal(c.g, 128);
        assert.equal(c.b, 0);
        assert.equal(c.a, 255);
        assert.equal(c.premultiplied, false);
        assert.equal(c.hex(), '#008000');
        assert.equal(c.toString(), 'rgb(0,128,0)');
        var c = new mapnik.Color(0, 128, 0, 255, true);
        assert.equal(c.r, 0);
        assert.equal(c.g, 128);
        assert.equal(c.b, 0);
        assert.equal(c.a, 255);
        assert.equal(c.premultiplied, true);
        assert.equal(c.hex(), '#008000');
        assert.equal(c.toString(), 'rgb(0,128,0)');
    });

    it('should be gray via rgba %', function() {
        var c = new mapnik.Color('rgba(0%,50%,0%,1)');
        assert.equal(c.r, 0);
        assert.equal(c.g, 128);
        assert.equal(c.b, 0);
        assert.equal(c.a, 255);
        assert.equal(c.premultiplied, false);
        assert.equal(c.hex(), '#008000');
        assert.equal(c.toString(), 'rgb(0,128,0)');
        var c = new mapnik.Color('rgba(0%,50%,0%,1)', true);
        assert.equal(c.r, 0);
        assert.equal(c.g, 128);
        assert.equal(c.b, 0);
        assert.equal(c.a, 255);
        assert.equal(c.premultiplied, true);
    });
    
    it('should have all property setting working', function() {
        var c = new mapnik.Color(0,0,0,0);
        assert.equal(c.r, 0);
        assert.equal(c.g, 0);
        assert.equal(c.b, 0);
        assert.equal(c.a, 0);
        assert.equal(c.premultiplied, false);
        c.r = 1;
        c.g = 2;
        c.b = 3;
        c.a = 4;
        c.premultiplied = true;
        assert.equal(c.r, 1);
        assert.equal(c.g, 2);
        assert.equal(c.b, 3);
        assert.equal(c.a, 4);
        assert.equal(c.premultiplied, true);
    });
});