(function () {
'use strict';

var ID = 'core/event';
var DEPS = ['_'];

describe('module \'' + ID + '\'', function () {

    before(function () {

        this.definition = modulejs._private.definitions[ID];

        this.applyFn = function () {

            return this.definition.fn(_);
        };
    });

    describe('definition', function () {

        it('is defined', function () {

            assert.isPlainObject(this.definition);
        });

        it('has correct id', function () {

            assert.strictEqual(this.definition.id, ID);
        });

        it('requires correct', function () {

            assert.deepEqual(this.definition.deps, DEPS);
        });

        it('args for each request', function () {

            assert.strictEqual(this.definition.deps.length, this.definition.fn.length);
        });

        it('has no instance', function () {

            assert.notProperty(modulejs._private.instances, ID);
        });

        it('inits without errors', function () {

            this.applyFn();
        });
    });

    describe('application', function () {

        it('returns plain object with 3 properties', function () {

            var instance = this.applyFn();
            assert.isPlainObject(instance);
            assert.lengthOfKeys(instance, 3);
        });
    });

    describe('.sub()', function () {

        it('is function', function () {

            var instance = this.applyFn();
            assert.isFunction(instance.sub);
        });
    });

    describe('.unsub()', function () {

        it('is function', function () {

            var instance = this.applyFn();
            assert.isFunction(instance.unsub);
        });
    });

    describe('.pub()', function () {

        it('is function', function () {

            var instance = this.applyFn();
            assert.isFunction(instance.pub);
        });
    });

    describe('works', function () {

        it('works', function () {

            var topic = 'topic';
            var arg1 = 'arg1';
            var arg2 = 'arg2';
            var arg3 = 'arg3';
            var subSpy = sinon.spy();

            var instance = this.applyFn();
            instance.sub(topic, subSpy);
            instance.pub(topic, arg1, arg2, arg3);

            assert.isTrue(subSpy.calledOnce);
            assert.deepEqual(subSpy.firstCall.args, [arg1, arg2, arg3]);

            instance.pub(topic, arg1, arg2);

            assert.isTrue(subSpy.calledTwice);
            assert.deepEqual(subSpy.firstCall.args, [arg1, arg2, arg3]);
            assert.deepEqual(subSpy.secondCall.args, [arg1, arg2]);

            instance.unsub(topic, subSpy);

            assert.isTrue(subSpy.calledTwice);
            assert.deepEqual(subSpy.firstCall.args, [arg1, arg2, arg3]);
            assert.deepEqual(subSpy.secondCall.args, [arg1, arg2]);

            instance.pub(topic, arg1);

            assert.isTrue(subSpy.calledTwice);
            assert.deepEqual(subSpy.firstCall.args, [arg1, arg2, arg3]);
            assert.deepEqual(subSpy.secondCall.args, [arg1, arg2]);
        });
    });
});

}());