joii/test/ClassBuilder/ConstantTest.js

Javascript Object Inheritance Implementation

/* Javascript Object Inheritance Implementation                ______  ________
 * (c) 2016 <harold@iedema.me>                             __ / / __ \/  _/  _/
 * Licensed under MIT.                                    / // / /_/ // /_/ /
 * ------------------------------------------------------ \___/\____/___/__*/
var JOII = require('../../dist/joii').JOII;

/**
 * Tests class property meta data and validation.
 */
test('ClassBuilder:ConstantTest', function(assert) {

    var c1 = JOII.ClassBuilder({
        'const FIRST' : 1,
        'const SECOND' : 2,
        'const THIRD' : 3
    });

    var c2 = JOII.ClassBuilder({'extends': c1}, {
        'const FOURTH' : 4,
        'const FIFTH' : 5,
        'const SIXTH' : 6,

        __construct: function() {
            this.FOURTH = 3;
            assert.strictEqual(this.FOURTH, 4, 'this.FOURTH is still 4 after modification.');
        }
    });

    var c3 = JOII.ClassBuilder({'extends': c1}, {
        'const SEVENTH' : 7,
        'const EIGHTH' : 8,
        'const NINTH' : 9
    });

    assert.strictEqual(c1.FIRST, 1, 'FIRST is defined in c1');
    assert.strictEqual(c1.SECOND, 2, 'SECOND is defined in c1');
    assert.strictEqual(c1.THIRD, 3, 'THIRD is defined in c1');

    assert.strictEqual(c2.FIRST, 1, 'FIRST is defined in c2');
    assert.strictEqual(c2.SECOND, 2, 'SECOND is defined in c2');
    assert.strictEqual(c2.THIRD, 3, 'THIRD is defined in c2');
    assert.strictEqual(c2.FOURTH, 4, 'FOURTH is defined in c2');
    assert.strictEqual(c2.FIFTH, 5, 'FIFTH is defined in c2');
    assert.strictEqual(c2.SIXTH, 6, 'SIXTH is defined in c2');
    assert.strictEqual(typeof(c2.SEVENTH), 'undefined', 'SEVENTH is not defined in c2');
    assert.strictEqual(typeof(c2.EIGHTH), 'undefined', 'EIGHTH is not defined in c2');
    assert.strictEqual(typeof(c2.NINTH), 'undefined', 'NINTH is not defined in c2');

    assert.strictEqual(c3.FIRST, 1, 'FIRST is defined in c3');
    assert.strictEqual(c3.SECOND, 2, 'SECOND is defined in c3');
    assert.strictEqual(c3.THIRD, 3, 'THIRD is defined in c3');
    assert.strictEqual(c3.SEVENTH, 7, 'SEVENTH is defined in c3');
    assert.strictEqual(c3.EIGHTH, 8, 'EIGHTH is defined in c3');
    assert.strictEqual(c3.NINTH, 9, 'NINTH is defined in c3');
    assert.strictEqual(typeof(c3.FOURTH), 'undefined', 'FOURTH is not defined in c3');
    assert.strictEqual(typeof(c3.FIFTH), 'undefined', 'FIFTH is not defined in c3');
    assert.strictEqual(typeof(c3.SIXTH), 'undefined', 'SIXTH is not defined in c3');

    // Test writability
    c3.FIRST = 2;
    assert.strictEqual(c3.FIRST, 1, 'FIRST is still 1 in c3');
});