bbop-registry/tests/core.test.js

Generic lightweight listener/callback registry system.

////
//// Some unit testing for package bbop-rest-manager.
////

var chai = require('chai');
chai.config.includeStack = true;
var assert = chai.assert;
var registry = require('..');

// Correct environment, ready testing.
var us = require('underscore');
var bbop = require('bbop-core');

///
/// Start unit testing.
///

describe('overall functionality', function(){
    
    it('basics', function(){
	
	// Absolute basics.
	var reg = new registry(['start', 'stop', 'reset']);
	assert.equal(us.keys(reg.callback_registry).length, 3, "3 categories");
	assert.equal(us.keys(reg.callback_registry['reset']).length, 0,
		     "nothing in");
	
	// Create testable environment.
	var acc = 0;
	function plus(plus_val){ acc = acc + plus_val; }
	function mult(mult_val){ acc = acc * mult_val; }
	function sum(val1, val2){ acc = val1 + val2; }
	
	// Registration tests.
	reg.register('reset', plus, 0, '0');
	reg.register('reset', mult, 1, '1');
	assert.equal(reg.get_callbacks('reset').length, 2, "2 callbacks");
	reg.unregister('reset', '1');
	assert.equal(reg.get_callbacks('reset').length, 1, "now 1 callback");
	
	// Test apply.
	acc = 0;
	reg.register('start', plus, 0, '0');
	reg.register('start', mult, 1, '1');
	reg.apply_callbacks('start', [2]);
	assert.equal(acc, 2, "higher priority goes first");
	
	// Test apply and priority.
	acc = 0;
	reg.register('stop', plus, 1, '1');
	reg.register('stop', mult, 0, '0');
	reg.apply_callbacks('stop', [2]);
	assert.equal(acc, 4, "apply test 2");
	
	// Test multivalued apply.
	acc = 0;
	reg.unregister('stop', '0');
	reg.unregister('stop', '1');
	reg.register('stop', sum, -1, '-1');
	reg.apply_callbacks('stop', [2, 3]);
	assert.equal(acc, 5, "apply test 3");
	
	// is_registered
	assert.equal(null, reg.is_registered('foo', 'bar'), "is_r? test 1");
	assert.isFalse(reg.is_registered('stop', 'bar'), "is_r? test 2");
	assert.isTrue(reg.is_registered('stop', '-1'), "is_r? test 3");
	
    });

    it('implied ids work', function(){

	var reg = new registry(['start', 'stop', 'reset']);
	var rid = reg.register('start', function(){});
	assert.isTrue(reg.is_registered('start', rid), "can see dynamic id");

	reg.unregister('start', rid);
	assert.isFalse(reg.is_registered('start', rid), "delete by dynamic id");
	
    });	

});