postal.js/spec/ChannelDefinition.spec.js

describe( "ChannelDefinition", function () {
	describe( "When initializing a channel definition", function () {
		var chDef = new ChannelDefinition( "TestChannel" );
		it( "should set channel to TestChannel", function () {
			expect( chDef.channel ).to.be( "TestChannel" );
		} );
	} );
	describe( "When calling subscribe", function () {
		var ch = new ChannelDefinition( "TestChannel" ),
			sub = ch.subscribe( "TestTopic", function () {
			} );
		it( "subscription should be instance of SubscriptionDefinition", function () {
			expect( sub instanceof SubscriptionDefinition ).to.be.ok();
		} );
	} );
	describe( "When publishing from a channel definition", function(){
		var channel, subscription;
		beforeEach(function(){
			channel = postal.channel("OhHai");
		});
		afterEach(function(){
			postal.utils.reset();
			channel = undefined;
			subscription = undefined;
		});
		it( "Should allow a topic only to be used", function(done){
			subscription = channel.subscribe("topic.only", function(d, e) {
				expect(typeof d === "undefined" ).to.be(true);
        expect(e.topic).to.be("topic.only");
        done();
			});
			channel.publish("topic.only");
		});
		it( "Should allow a topic and data argument to be used", function(done){
			subscription = channel.subscribe("topic.and.data", function(d, e) {
				expect(d).to.be("hai");
        expect(e.topic).to.be("topic.and.data");
        done()
			});
			channel.publish("topic.and.data", "hai");
		});
		it( "Should allow an envelope argument to be used", function(done){
			subscription = channel.subscribe("envelope", function(d, e) {
				expect( e.channel).to.be("OhHai");
				expect( e.data).to.be("hai");
				expect( e.foo).to.be("bar");
        done();
			});
			channel.publish({ topic: "envelope", data: "hai", foo: "bar" });
		});
	});
} );