osync/test/proxy/objectProxy.test.js

Plain Javascript object synchronization framework

var expect = require('unexpected/unexpected');
var ObjectProxy = require('../../src/proxy/objectProxy');

describe('ObjectProxy', function() {
    describe('object', function() {
        it('can create proxy on data', function() {
            var obj = {
                property1: 0
            };
            var proxy = new ObjectProxy(obj);
            expect(proxy, 'to be defined');
        });
        it('contains source property', function() {
            var obj = {
                property1: 0
            };
            var proxy = new ObjectProxy(obj);
            expect(proxy.property1, 'to be defined');
        });
        it('can get the value of a source property', function() {
            var obj = {
                property1: 0
            };
            var proxy = new ObjectProxy(obj);
            expect(proxy.property1, 'to equal', 0);
        });
        it('can set the value of a source property', function() {
            var obj = {
                property1: 0
            };
            var proxy = new ObjectProxy(obj);
            proxy.property1 = 1;
            expect(proxy.property1, 'to equal', 1);
        });
        it('changes underlying data', function() {
            var obj = {
                property1: 0
            };
            var proxy = new ObjectProxy(obj);
            proxy.property1 = 1;
            expect(obj.property1, 'to equal', 1);
        });
        it('changes proxy property', function() {
            var obj = {
                property1: 0
            };
            var proxy = new ObjectProxy(obj);
            obj.property1 = 1;
            expect(proxy.property1, 'to equal', 1);
        });
    });
    describe('array', function() {
        it('can set the value of a source array property', function() {
            var obj = {
                arr1: []
            };
            var proxy = new ObjectProxy(obj);
            proxy.arr1 = [1];
            expect(proxy.arr1, 'to equal', [1]);
        });
        it('changes underlying data', function() {
            var obj = {
                arr1: []
            };
            var proxy = new ObjectProxy(obj);
            proxy.arr1 = [1];
            expect(obj.arr1, 'to equal', [1]);
        });
    });
    describe('subscriptions', function() {
        it('triggers an event when modifying plain property', function() {
            var obj = {
                prop: 2
            };
            var result = {};
            var proxy = new ObjectProxy(obj);
            proxy.on('change', function(evt) {
                result[evt.key] = evt.value;
            });
            proxy.prop = 3;
            expect(result.prop, 'to equal', 3);
        });
    });
});