/**
 * Copyright 2014 IBM Corp.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 **/

var should = require("should");
var sinon = require("sinon");
var path = require("path");
var when = require("when");

var RedNodes = require("../../../../red/nodes");
var RedNode = require("../../../../red/nodes/Node");
var typeRegistry = require("../../../../red/nodes/registry");
var events = require("../../../../red/events");

afterEach(function() {
    typeRegistry.clear();
});

describe('red/nodes/registry/index', function() {
    var resourcesDir = path.join(__dirname,"..","resources",path.sep);

    function stubSettings(s,available,initialConfig) {
        s.available =  function() {return available;};
        s.set = function(s,v) { return when.resolve();};
        s.get = function(s) { return initialConfig;};
        return s;
    }
    var settings = stubSettings({},false,null);
    var settingsWithStorage = stubSettings({},true,null);

    it('handles nodes that export a function', function(done) {
        typeRegistry.init(settings);
        typeRegistry.load(resourcesDir + "TestNode1",true).then(function() {
            var list = typeRegistry.getNodeList();
            list.should.be.an.Array.and.have.lengthOf(1);
            list[0].should.have.property("id","node-red/TestNode1");
            list[0].should.have.property("name","TestNode1");
            list[0].should.have.property("module","node-red");
            list[0].should.have.property("types",["test-node-1"]);
            list[0].should.have.property("enabled",true);
            list[0].should.not.have.property("err");

            var nodeConstructor = typeRegistry.get("test-node-1");
            nodeConstructor.should.be.type("function");

            done();
        }).catch(function(e) {
            done(e);
        });

    });


    it('handles nodes that export a function returning a resolving promise', function(done) {
        typeRegistry.init(settings);
        typeRegistry.load(resourcesDir + "TestNode2",true).then(function() {
            var list = typeRegistry.getNodeList();
            list.should.be.an.Array.and.have.lengthOf(1);
            list[0].should.have.property("id","node-red/TestNode2");
            list[0].should.have.property("name","TestNode2");
            list[0].should.have.property("module","node-red");
            list[0].should.have.property("types",["test-node-2"]);
            list[0].should.have.property("enabled",true);
            list[0].should.not.have.property("err");
            var nodeConstructor = typeRegistry.get("test-node-2");
            nodeConstructor.should.be.type("function");

            done();
        }).catch(function(e) {
            done(e);
        });

    });

    it('handles nodes that export a function returning a rejecting promise', function(done) {
        typeRegistry.init(settings);
        typeRegistry.load(resourcesDir + "TestNode3",true).then(function() {
            var list = typeRegistry.getNodeList();
            list.should.be.an.Array.and.have.lengthOf(1);
            list[0].should.have.property("id","node-red/TestNode3");
            list[0].should.have.property("name","TestNode3");
            list[0].should.have.property("module","node-red");
            list[0].should.have.property("types",["test-node-3"]);
            list[0].should.have.property("enabled",true);
            list[0].should.have.property("err","fail");

            var nodeConstructor = typeRegistry.get("test-node-3");
            (nodeConstructor === null).should.be.true;

            done();
        }).catch(function(e) {
            done(e);
        });

    });

    it('handles files containing multiple nodes', function(done) {
        typeRegistry.init(settings);
        typeRegistry.load(resourcesDir + "MultipleNodes1",true).then(function() {
            var list = typeRegistry.getNodeList();
            list.should.be.an.Array.and.have.lengthOf(1);
            list[0].should.have.property("id","node-red/MultipleNodes1");
            list[0].should.have.property("name","MultipleNodes1");
            list[0].should.have.property("module","node-red");
            list[0].should.have.property("types",["test-node-multiple-1a","test-node-multiple-1b"]);
            list[0].should.have.property("enabled",true);
            list[0].should.not.have.property("err");

            var nodeConstructor = typeRegistry.get("test-node-multiple-1a");
            nodeConstructor.should.be.type("function");

            nodeConstructor = typeRegistry.get("test-node-multiple-1b");
            nodeConstructor.should.be.type("function");

            done();
        }).catch(function(e) {
            done(e);
        });
    });

    it('handles nested directories', function(done) {
        typeRegistry.init(settings);
        typeRegistry.load(resourcesDir + "NestedDirectoryNode",true).then(function() {
            var list = typeRegistry.getNodeList();
            list.should.be.an.Array.and.have.lengthOf(1);
            list[0].should.have.property("id","node-red/NestedNode");
            list[0].should.have.property("name","NestedNode");
            list[0].should.have.property("module","node-red");
            list[0].should.have.property("types",["nested-node-1"]);
            list[0].should.have.property("enabled",true);
            list[0].should.not.have.property("err");
            done();
        }).catch(function(e) {
            done(e);
        });
    });

    it('emits type-registered and node-icon-dir events', function(done) {
        var eventEmitSpy = sinon.spy(events,"emit");
        typeRegistry.init(settings);
        typeRegistry.load(resourcesDir + "NestedDirectoryNode",true).then(function() {
            var list = typeRegistry.getNodeList();
            list.should.be.an.Array.and.have.lengthOf(1);
            list[0].should.have.property("id","node-red/NestedNode");
            list[0].should.have.property("name","NestedNode");
            list[0].should.have.property("module","node-red");
            list[0].should.have.property("types",["nested-node-1"]);
            list[0].should.have.property("enabled",true);
            list[0].should.not.have.property("err");

            eventEmitSpy.callCount.should.equal(2);

            eventEmitSpy.firstCall.args[0].should.be.equal("node-icon-dir");
            eventEmitSpy.firstCall.args[1].should.be.equal(
                    resourcesDir + "NestedDirectoryNode" + path.sep + "NestedNode" + path.sep + "icons");

            eventEmitSpy.secondCall.args[0].should.be.equal("type-registered");
            eventEmitSpy.secondCall.args[1].should.be.equal("nested-node-1");

            done();
        }).catch(function(e) {
            done(e);
        }).finally(function() {
            eventEmitSpy.restore();
        });
    });

    it('rejects a duplicate node type registration during load', function(done) {
        typeRegistry.init(stubSettings({
            nodesDir:[resourcesDir + "TestNode1",resourcesDir + "DuplicateTestNode"]
        },false));
        typeRegistry.load("wontexist",true).then(function() {
            var list = typeRegistry.getNodeList();

            list.should.be.an.Array.and.have.lengthOf(1);
            list[0].should.have.property("id","node-red/TestNode1");
            list[0].should.have.property("name","TestNode1");
            list[0].should.have.property("types",["test-node-1"]);
            list[0].should.have.property("enabled",true);
            list[0].should.not.have.property("err");

            done();
        }).catch(function(e) {
            done(e);
        });
    });

    it('rejects a duplicate node type registration', function(done) {

        typeRegistry.init(stubSettings({
            nodesDir:[resourcesDir + "TestNode1"]
        },false));
        typeRegistry.load("wontexist",true).then(function() {
            var list = typeRegistry.getNodeList();

            list.should.be.an.Array.and.have.lengthOf(1);
            
            /*jshint immed: false */
            (function(){
                typeRegistry.registerType("test-node-1",{});
            }).should.throw();

            done();
        }).catch(function(e) {
            done(e);
        });
    });
    
    it('handles nodesDir as a string', function(done) {

        typeRegistry.init(stubSettings({
            nodesDir :resourcesDir + "TestNode1"
        },false));
        typeRegistry.load("wontexist",true).then(function(){
            var list = typeRegistry.getNodeList();
            list.should.be.an.Array.and.have.lengthOf(1);
            list[0].should.have.property("types",["test-node-1"]);
            done();
        }).catch(function(e) {
            done("Loading of non-existing nodesDir should succeed");
        });

    });

    it('handles invalid nodesDir',function(done) {

        typeRegistry.init(stubSettings({
            nodesDir : "wontexist"
        },false));
        typeRegistry.load("wontexist",true).then(function(){
            var list = typeRegistry.getNodeList();
            list.should.be.an.Array.and.be.empty;
            done();
        }).catch(function(e) {
            done("Loading of non-existing nodesDir should succeed");
        });
    });

    it('returns nothing for an unregistered type config', function(done) {
        typeRegistry.init(settings);
        typeRegistry.load("wontexist",true).then(function(){
            var config = typeRegistry.getNodeConfig("imaginary-shark");
            (config === null).should.be.true;
            done();
        }).catch(function(e) {
            done(e);
        });
    });

    it('excludes node files listed in nodesExcludes',function(done) {
        typeRegistry.init(stubSettings({
            nodesExcludes: [ "TestNode1.js" ],
            nodesDir:[resourcesDir + "TestNode1",resourcesDir + "TestNode2"]
        },false));
        typeRegistry.load("wontexist",true).then(function() {
            var list = typeRegistry.getNodeList();
            list.should.be.an.Array.and.have.lengthOf(1);
            list[0].should.have.property("types",["test-node-2"]);
            done();
        }).catch(function(e) {
            done(e);
        });
    });

    it('returns the node configurations', function(done) {
        typeRegistry.init(stubSettings({
            nodesDir:[resourcesDir + "TestNode1",resourcesDir + "TestNode2"]
        },false));
        typeRegistry.load("wontexist",true).then(function() {
            var list = typeRegistry.getNodeList();

            var nodeConfigs = typeRegistry.getNodeConfigs();

            // TODO: this is brittle...
            nodeConfigs.should.equal("<script type=\"text/x-red\" data-template-name=\"test-node-1\"></script>\n<script type=\"text/x-red\" data-help-name=\"test-node-1\"></script>\n<script type=\"text/javascript\">RED.nodes.registerType('test-node-1',{});</script>\n<style></style>\n<p>this should be filtered out</p>\n<script type=\"text/x-red\" data-template-name=\"test-node-2\"></script>\n<script type=\"text/x-red\" data-help-name=\"test-node-2\"></script>\n<script type=\"text/javascript\">RED.nodes.registerType('test-node-2',{});</script>\n<style></style>\n");

            var nodeId = list[0].id;
            var nodeConfig = typeRegistry.getNodeConfig(nodeId);
            nodeConfig.should.equal("<script type=\"text/x-red\" data-template-name=\"test-node-1\"></script>\n<script type=\"text/x-red\" data-help-name=\"test-node-1\"></script>\n<script type=\"text/javascript\">RED.nodes.registerType('test-node-1',{});</script>\n<style></style>\n<p>this should be filtered out</p>\n");
            done();
        }).catch(function(e) {
            done(e);
        });
    });

    it('stores the node list', function(done) {
        var settings = {
            nodesDir:[resourcesDir + "TestNode1",resourcesDir + "TestNode2",resourcesDir + "TestNode3"],
            available: function() { return true; },
            set: function(s,v) { return when.resolve(); },
            get: function(s) { return null; }
        };
        var settingsSave = sinon.spy(settings,"set");
        typeRegistry.init(settings);
        typeRegistry.load("wontexist",true).then(function() {
            var nodeList = typeRegistry.getNodeList();
            var moduleList = typeRegistry.getModuleList();
            Object.keys(moduleList).should.have.length(1);
            moduleList.should.have.a.property("node-red");
            Object.keys(moduleList["node-red"].nodes).should.have.length(3);
            
            nodeList.should.be.Array.and.have.length(3);

            settingsSave.callCount.should.equal(1);
            settingsSave.firstCall.args[0].should.be.equal("nodes");
            var savedList = settingsSave.firstCall.args[1];
     
            moduleList['node-red'].nodes['TestNode1'].should.have.a.property("id","node-red/TestNode1");
            moduleList['node-red'].nodes['TestNode1'].should.have.a.property("name","TestNode1");
            moduleList['node-red'].nodes['TestNode1'].should.have.a.property("module","node-red");
            moduleList['node-red'].nodes['TestNode1'].should.have.a.property("file");
            moduleList['node-red'].nodes['TestNode1'].should.have.a.property("enabled",true);
            moduleList['node-red'].nodes['TestNode1'].should.have.a.property("types");
            moduleList['node-red'].nodes['TestNode1'].should.have.a.property("config");
            moduleList['node-red'].nodes['TestNode1'].should.have.a.property("template");

            savedList['node-red'].nodes['TestNode1'].should.not.have.a.property("id");
            savedList['node-red'].nodes['TestNode1'].should.have.a.property("name",moduleList['node-red'].nodes['TestNode1'].name);
            savedList['node-red'].nodes['TestNode1'].should.have.a.property("module",moduleList['node-red'].nodes['TestNode1'].module);
            savedList['node-red'].nodes['TestNode1'].should.have.a.property("file",moduleList['node-red'].nodes['TestNode1'].file);
            savedList['node-red'].nodes['TestNode1'].should.have.a.property("enabled",moduleList['node-red'].nodes['TestNode1'].enabled);
            savedList['node-red'].nodes['TestNode1'].should.have.a.property("types",moduleList['node-red'].nodes['TestNode1'].types);
            savedList['node-red'].nodes['TestNode1'].should.not.have.a.property("config");
            savedList['node-red'].nodes['TestNode1'].should.not.have.a.property("template");
            

            done();
        }).catch(function(e) {
            done(e);
        }).finally(function() {
            settingsSave.restore();
        });
    });

    it('returns node info by type or id', function(done) {
        typeRegistry.init(settings);
        typeRegistry.load(resourcesDir + "TestNode1",true).then(function() {
            var list = typeRegistry.getNodeList();
            list.should.be.an.Array.and.have.lengthOf(1);

            list[0].should.have.property("id","node-red/TestNode1");
            list[0].should.have.property("name","TestNode1");
            list[0].should.have.property("module","node-red");
            list[0].should.have.property("types",["test-node-1"]);
            list[0].should.have.property("enabled",true);
            list[0].should.not.have.property("err");
            
            var id = "node-red/TestNode1";
            var type = "test-node-1";

            
            var info = typeRegistry.getNodeInfo(id);
            info.should.have.property("loaded");
            delete info.loaded;
            list[0].should.eql(info);

            var info2 = typeRegistry.getNodeInfo(type);
            info2.should.have.property("loaded");
            delete info2.loaded;
            list[0].should.eql(info2);

            done();
        }).catch(function(e) {
            done(e);
        });

    });
    
    it('returns null node info for unrecognised id', function(done) {
        typeRegistry.init(settings);
        typeRegistry.load(resourcesDir + "TestNode1",true).then(function() {
            var list = typeRegistry.getNodeList();
            list.should.be.an.Array.and.have.lengthOf(1);

            should.not.exist(typeRegistry.getNodeInfo("does-not-exist"));

            done();
        }).catch(function(e) {
            done(e);
        });

    });

    it('returns modules list', function(done) {
        var fs = require("fs");
        var path = require("path");

        var pathJoin = (function() {
            var _join = path.join;
            return sinon.stub(path,"join",function() {
                if (arguments.length  == 3 && arguments[2] == "package.json") {
                    return _join(resourcesDir,"TestNodeModule" + path.sep + "node_modules" + path.sep,arguments[1],arguments[2]);
                }
                if (arguments.length == 2 && arguments[1] == "TestNodeModule") {
                    return _join(resourcesDir,"TestNodeModule" + path.sep + "node_modules" + path.sep,arguments[1]);
                }
                return _join.apply(this,arguments);
            });
        })();

        var readdirSync = (function() {
            var originalReaddirSync = fs.readdirSync;
            var callCount = 0;
            return sinon.stub(fs,"readdirSync",function(dir) {
                var result = [];
                if (callCount == 1) {
                    result = originalReaddirSync(resourcesDir + "TestNodeModule" + path.sep + "node_modules");
                }
                callCount++;
                return result;
            });
        })();
        typeRegistry.init(settingsWithStorage);
        typeRegistry.load("wontexist",true).then(function(){

            typeRegistry.addModule("TestNodeModule").then(function() {
                var list = typeRegistry.getModuleList();
                Object.keys(list).should.have.length(1);
                list.should.have.a.property("TestNodeModule");
                Object.keys(list["TestNodeModule"].nodes).should.have.length(2);

                list["TestNodeModule"].nodes["TestNodeMod1"].should.have.property("name", "TestNodeMod1");
                list["TestNodeModule"].nodes["TestNodeMod2"].should.have.property("name", "TestNodeMod2");

                done();
            }).catch(function(e) {
                done(e);
            });

        }).catch(function(e) {
            done(e);
        }).finally(function() {
            readdirSync.restore();
            pathJoin.restore();
        });
    });

    it('returns module info', function(done) {
        var fs = require("fs");
        var path = require("path");

        var pathJoin = (function() {
            var _join = path.join;
            return sinon.stub(path,"join",function() {
                if (arguments.length  == 3 && arguments[2] == "package.json") {
                    return _join(resourcesDir,"TestNodeModule" + path.sep + "node_modules" + path.sep,arguments[1],arguments[2]);
                }
                if (arguments.length == 2 && arguments[1] == "TestNodeModule") {
                    return _join(resourcesDir,"TestNodeModule" + path.sep + "node_modules" + path.sep,arguments[1]);
                }
                return _join.apply(this,arguments);
            });
        })();

        var readdirSync = (function() {
            var originalReaddirSync = fs.readdirSync;
            var callCount = 0;
            return sinon.stub(fs,"readdirSync",function(dir) {
                var result = [];
                if (callCount == 1) {
                    result = originalReaddirSync(resourcesDir + "TestNodeModule" + path.sep + "node_modules");
                }
                callCount++;
                return result;
            });
        })();
        typeRegistry.init(settingsWithStorage);
        typeRegistry.load("wontexist",true).then(function(){

            typeRegistry.addModule("TestNodeModule").then(function(modInfo) {
                var info = typeRegistry.getModuleInfo("TestNodeModule");
                
                modInfo.should.eql(info);
                should.not.exist(typeRegistry.getModuleInfo("does-not-exist"));
                
                done();
            }).catch(function(e) {
                done(e);
            });

        }).catch(function(e) {
            done(e);
        }).finally(function() {
            readdirSync.restore();
            pathJoin.restore();
        });
    });

    it('scans the node_modules path for node files', function(done) {
        var fs = require("fs");
        var path = require("path");

        var eventEmitSpy = sinon.spy(events,"emit");
        var pathJoin = (function() {
            var _join = path.join;
            return sinon.stub(path,"join",function() {
                if (arguments.length  == 3 && arguments[2] == "package.json") {
                    return _join(resourcesDir,"TestNodeModule" + path.sep + "node_modules" + path.sep,arguments[1],arguments[2]);
                }
                if (arguments.length == 2 && arguments[1] == "TestNodeModule") {
                    return _join(resourcesDir,"TestNodeModule" + path.sep + "node_modules" + path.sep,arguments[1]);
                }
                return _join.apply(this,arguments);
            });
        })();

        var readdirSync = (function() {
            var originalReaddirSync = fs.readdirSync;
            var callCount = 0;
            return sinon.stub(fs,"readdirSync",function(dir) {
                var result = [];
                if (callCount == 1) {
                    result = originalReaddirSync(resourcesDir + "TestNodeModule" + path.sep + "node_modules");
                }
                callCount++;
                return result;
            });
        })();

        typeRegistry.init(settings);
        typeRegistry.load("wontexist",false).then(function(){
            var list = typeRegistry.getNodeList();
            list.should.be.an.Array.and.have.lengthOf(2);
            list[0].should.have.property("id","TestNodeModule/TestNodeMod1");
            list[0].should.have.property("name","TestNodeMod1");
            list[0].should.have.property("module","TestNodeModule");
            list[0].should.have.property("types",["test-node-mod-1"]);
            list[0].should.have.property("enabled",true);
            list[0].should.not.have.property("err");

            list[1].should.have.property("id","TestNodeModule/TestNodeMod2");
            list[1].should.have.property("name","TestNodeMod2");
            list[1].should.have.property("module","TestNodeModule");
            list[1].should.have.property("types",["test-node-mod-2"]);
            list[1].should.have.property("enabled",true);
            list[1].should.have.property("err");


            eventEmitSpy.callCount.should.equal(2);

            eventEmitSpy.firstCall.args[0].should.be.equal("node-icon-dir");
            eventEmitSpy.firstCall.args[1].should.be.equal(
                    resourcesDir + "TestNodeModule" + path.sep+ "node_modules" + path.sep + "TestNodeModule" + path.sep + "icons");

            eventEmitSpy.secondCall.args[0].should.be.equal("type-registered");
            eventEmitSpy.secondCall.args[1].should.be.equal("test-node-mod-1");

            done();
        }).catch(function(e) {
            done(e);
        }).finally(function() {
            readdirSync.restore();
            pathJoin.restore();
            eventEmitSpy.restore();
        });
    });

    it('allows nodes to be added by module name', function(done) {
        var fs = require("fs");
        var path = require("path");

        var pathJoin = (function() {
            var _join = path.join;
            return sinon.stub(path,"join",function() {
                if (arguments.length  == 3 && arguments[2] == "package.json") {
                    return _join(resourcesDir,"TestNodeModule" + path.sep + "node_modules" + path.sep,arguments[1],arguments[2]);
                }
                if (arguments.length == 2 && arguments[1] == "TestNodeModule") {
                    return _join(resourcesDir,"TestNodeModule" + path.sep + "node_modules" + path.sep,arguments[1]);
                }
                return _join.apply(this,arguments);
            });
        })();

        var readdirSync = (function() {
            var originalReaddirSync = fs.readdirSync;
            var callCount = 0;
            return sinon.stub(fs,"readdirSync",function(dir) {
                var result = [];
                if (callCount == 1) {
                    result = originalReaddirSync(resourcesDir + "TestNodeModule" + path.sep + "node_modules");
                }
                callCount++;
                return result;
            });
        })();
        typeRegistry.init(settingsWithStorage);
        typeRegistry.load("wontexist",true).then(function(){
            var list = typeRegistry.getNodeList();
            list.should.be.an.Array.and.be.empty;

            typeRegistry.addModule("TestNodeModule").then(function(modInfo) {
                list = typeRegistry.getNodeList();
                list.should.be.an.Array.and.have.lengthOf(2);
                list[0].should.have.property("id","TestNodeModule/TestNodeMod1");
                list[0].should.have.property("name","TestNodeMod1");
                list[0].should.have.property("module","TestNodeModule");
                list[0].should.have.property("types",["test-node-mod-1"]);
                list[0].should.have.property("enabled",true);
                list[0].should.not.have.property("err");

                list[1].should.have.property("id","TestNodeModule/TestNodeMod2");
                list[1].should.have.property("name","TestNodeMod2");
                list[1].should.have.property("module","TestNodeModule");
                list[1].should.have.property("types",["test-node-mod-2"]);
                list[1].should.have.property("enabled",true);
                list[1].should.have.property("err");

                done();
            }).catch(function(e) {
                done(e);
            });

        }).catch(function(e) {
            done(e);
        }).finally(function() {
            readdirSync.restore();
            pathJoin.restore();
        });
    });

    it('adds module with version number', function(done) {
        var fs = require("fs");
        var path = require("path");

        var pathJoin = (function() {
            var _join = path.join;
            return sinon.stub(path,"join",function() {
                if (arguments.length  == 3 && arguments[2] == "package.json") {
                    return _join(resourcesDir,"TestNodeModule" + path.sep + "node_modules" + path.sep,arguments[1],arguments[2]);
                }
                if (arguments.length == 2 && arguments[1] == "TestNodeModule") {
                    return _join(resourcesDir,"TestNodeModule" + path.sep + "node_modules" + path.sep,arguments[1]);
                }
                return _join.apply(this,arguments);
            });
        })();

        var readdirSync = (function() {
            var originalReaddirSync = fs.readdirSync;
            var callCount = 0;
            return sinon.stub(fs,"readdirSync",function(dir) {
                var result = [];
                if (callCount == 1) {
                    result = originalReaddirSync(resourcesDir + "TestNodeModule" + path.sep + "node_modules");
                }
                callCount++;
                return result;
            });
        })();
        typeRegistry.init(settingsWithStorage);
        typeRegistry.load("wontexist",true).then(function(){
            typeRegistry.addModule("TestNodeModule","0.0.1").then(function(node) {
                var module = typeRegistry.getModuleInfo("TestNodeModule");

                module.should.have.property("name","TestNodeModule");
                module.should.have.property("version","0.0.1");

                var modules = typeRegistry.getModuleList();

                modules.should.have.property("TestNodeModule");
                modules["TestNodeModule"].should.have.property("version","0.0.1");

                done();
            }).catch(function(e) {
                done(e);
            });

        }).catch(function(e) {
            done(e);
        }).finally(function() {
            readdirSync.restore();
            pathJoin.restore();
        });
    });

    it('rejects adding duplicate node modules', function(done) {
        var fs = require("fs");
        var path = require("path");

        var pathJoin = (function() {
            var _join = path.join;
            return sinon.stub(path,"join",function() {
                if (arguments.length  == 3 && arguments[2] == "package.json") {
                    return _join(resourcesDir,"TestNodeModule" + path.sep + "node_modules" + path.sep,arguments[1],arguments[2]);
                }
                if (arguments.length == 2 && arguments[1] == "TestNodeModule") {
                    return _join(resourcesDir,"TestNodeModule" + path.sep + "node_modules" + path.sep,arguments[1]);
                }
                return _join.apply(this,arguments);
            });
        })();

        var readdirSync = (function() {
            var originalReaddirSync = fs.readdirSync;
            var callCount = 0;
            return sinon.stub(fs,"readdirSync",function(dir) {
                var result = [];
                if (callCount == 1) {
                    result = originalReaddirSync(resourcesDir + "TestNodeModule" + path.sep + "node_modules");
                }
                callCount++;
                return result;
            });
        })();

        typeRegistry.init(settingsWithStorage);
        typeRegistry.load('wontexist',false).then(function(){
            var list = typeRegistry.getNodeList();
            list.should.be.an.Array.and.have.lengthOf(2);
            typeRegistry.addModule("TestNodeModule").then(function(node) {
                done(new Error("addModule resolved"));
            }).otherwise(function(err) {
                done();
            });
        }).catch(function(e) {
            done(e);
        }).finally(function() {
            readdirSync.restore();
            pathJoin.restore();
        });
    });


    it('fails to add non-existent module name', function(done) {
        typeRegistry.init(settingsWithStorage);
        typeRegistry.load("wontexist",true).then(function(){
            var list = typeRegistry.getNodeList();
            list.should.be.an.Array.and.be.empty;

            typeRegistry.addModule("DoesNotExistModule").then(function(node) {
                done(new Error("ENOENT not thrown"));
            }).otherwise(function(e) {
                e.code.should.eql("MODULE_NOT_FOUND");
                done();
            });

        }).catch(function(e) {
            done(e);
        });
    });

    it('removes nodes from the registry by module', function(done) {
        var fs = require("fs");
        var path = require("path");

        var pathJoin = (function() {
            var _join = path.join;
            return sinon.stub(path,"join",function() {
                if (arguments.length  == 3 && arguments[2] == "package.json") {
                    return _join(resourcesDir,"TestNodeModule" + path.sep + "node_modules" + path.sep,arguments[1],arguments[2]);
                }
                if (arguments.length == 2 && arguments[1] == "TestNodeModule") {
                    return _join(resourcesDir,"TestNodeModule" + path.sep + "node_modules" + path.sep,arguments[1]);
                }
                return _join.apply(this,arguments);
            });
        })();

        var readdirSync = (function() {
            var originalReaddirSync = fs.readdirSync;
            var callCount = 0;
            return sinon.stub(fs,"readdirSync",function(dir) {
                var result = [];
                if (callCount == 1) {
                    result = originalReaddirSync(resourcesDir + "TestNodeModule" + path.sep + "node_modules");
                }
                callCount++;
                return result;
            });
        })();

        typeRegistry.init(settingsWithStorage);
        typeRegistry.load('wontexist',false).then(function(){
            var list = typeRegistry.getNodeList();
            list.should.be.an.Array.and.have.lengthOf(2);
            var res = typeRegistry.removeModule("TestNodeModule");

            res.should.be.an.Array.and.have.lengthOf(2);
            res[0].should.have.a.property("id",list[0].id);
            res[1].should.have.a.property("id",list[1].id);

            list = typeRegistry.getNodeList();
            list.should.be.an.Array.and.be.empty;

            done();
        }).catch(function(e) {
            done(e);
        }).finally(function() {
            readdirSync.restore();
            pathJoin.restore();
        });

    });

    it('fails to remove non-existent module name', function(done) {
        typeRegistry.init(settingsWithStorage);
        typeRegistry.load("wontexist",true).then(function(){
            var list = typeRegistry.getNodeList();
            list.should.be.an.Array.and.be.empty;

            /*jshint immed: false */
            (function() {
                typeRegistry.removeModule("DoesNotExistModule");
            }).should.throw("Unrecognised module: DoesNotExistModule");

            done();

        }).catch(function(e) {
            done(e);
        });
    });


    it('allows nodes to be enabled and disabled by id', function(done) {
        typeRegistry.init(settingsWithStorage);
        typeRegistry.load(resourcesDir+path.sep+"TestNode1",true).then(function() {
            var list = typeRegistry.getNodeList();
            list.should.be.an.Array.and.have.lengthOf(1);
            list[0].should.have.property("id","node-red/TestNode1");
            list[0].should.have.property("name","TestNode1");
            list[0].should.have.property("module","node-red");
            list[0].should.have.property("enabled",true);

            var nodeConfig = typeRegistry.getNodeConfigs();
            nodeConfig.length.should.be.greaterThan(0);

            var info = typeRegistry.disableNode(list[0].id);
            info.should.have.property("id",list[0].id);
            info.should.have.property("enabled",false);

            var list2 = typeRegistry.getNodeList();
            list2.should.be.an.Array.and.have.lengthOf(1);
            list2[0].should.have.property("enabled",false);

            typeRegistry.getNodeConfigs().length.should.equal(0);

            var info2 = typeRegistry.enableNode(list[0].id);
            info2.should.have.property("id",list[0].id);
            info2.should.have.property("enabled",true);

            var list3 = typeRegistry.getNodeList();
            list3.should.be.an.Array.and.have.lengthOf(1);
            list3[0].should.have.property("enabled",true);

            var nodeConfig2 = typeRegistry.getNodeConfigs();
            nodeConfig2.should.eql(nodeConfig);

            done();
        }).catch(function(e) {
            done(e);
        });
    });

    it('allows nodes to be enabled and disabled by node-type', function(done) {
        typeRegistry.init(settingsWithStorage);
        typeRegistry.load(resourcesDir+path.sep+"TestNode1",true).then(function() {
            var list = typeRegistry.getNodeList();

            list.should.be.an.Array.and.have.lengthOf(1);
            list[0].should.have.property("id","node-red/TestNode1");
            list[0].should.have.property("name","TestNode1");
            list[0].should.have.property("module","node-red");
            list[0].should.have.property("types",["test-node-1"]);
            list[0].should.have.property("enabled",true);

            var nodeConfig = typeRegistry.getNodeConfigs();
            nodeConfig.length.should.be.greaterThan(0);

            var info = typeRegistry.disableNode(list[0].types[0]);
            info.should.have.property("id",list[0].id);
            info.should.have.property("types",list[0].types);
            info.should.have.property("enabled",false);

            var list2 = typeRegistry.getNodeList();
            list2.should.be.an.Array.and.have.lengthOf(1);
            list2[0].should.have.property("enabled",false);

            typeRegistry.getNodeConfigs().length.should.equal(0);

            var info2 = typeRegistry.enableNode(list[0].types[0]);
            info2.should.have.property("id",list[0].id);
            info2.should.have.property("types",list[0].types);
            info2.should.have.property("enabled",true);

            var list3 = typeRegistry.getNodeList();
            list3.should.be.an.Array.and.have.lengthOf(1);
            list3[0].should.have.property("enabled",true);

            var nodeConfig2 = typeRegistry.getNodeConfigs();
            nodeConfig2.should.eql(nodeConfig);

            done();
        }).catch(function(e) {
            done(e);
        });
    });

    it('fails to enable/disable non-existent nodes', function(done) {
        typeRegistry.init(settingsWithStorage);
        typeRegistry.load("wontexist",true).then(function() {
            var list = typeRegistry.getNodeList();
            list.should.be.an.Array.and.be.empty;

            /*jshint immed: false */
            (function() {
                typeRegistry.disableNode("123");
            }).should.throw();

            /*jshint immed: false */
            (function() {
                typeRegistry.enableNode("123");
            }).should.throw();

            done();
        }).catch(function(e) {
            done(e);
        });
    });
    
    it("handles unavailable settings", function(done) {
        typeRegistry.init(settings);
    
        /*jshint immed: false */
        (function() {
            typeRegistry.enableNode("123");
        }).should.throw("Settings unavailable");
        /*jshint immed: false */
        (function() {
            typeRegistry.disableNode("123");
        }).should.throw("Settings unavailable");
        /*jshint immed: false */
        (function() {
            typeRegistry.addModule("123");
        }).should.throw("Settings unavailable");
        /*jshint immed: false */
        (function() {
            typeRegistry.removeModule("123");
        }).should.throw("Settings unavailable");
        
        done();
    });
});