public void read_a_directory()
        {
            var imports = new StringBuilder();

            imports.AppendLine("import from Pak2.Design, Pak2.Bindings");
            imports.AppendLine("import from Pak1");

            var exports = new StringBuilder();

            exports.AppendLine("export to all");

            _fileSystem.WriteStringToFile("imports.spark.config", imports.ToString());
            _fileSystem.WriteStringToFile("exports.spark.config", exports.ToString());

            _activator.ReadSparkConfig("Pak2.Core", ".", _packageLog);

            _graph.CompileDependencies("Pak1", "Pak2.Core", "Pak2.Design", "Pak2.Bindings");

            _graph.SharingsFor("Pak1").ShouldHaveTheSameElementsAs("Pak2.Core");
            _graph.SharingsFor("Pak2.Core").ShouldHaveTheSameElementsAs("Pak2.Design", "Pak2.Bindings", "Pak1");
            _graph.SharingsFor("Pak2.Design").ShouldHaveTheSameElementsAs("Pak2.Core");
            _graph.SharingsFor("Pak2.Bindings").ShouldHaveTheSameElementsAs("Pak2.Core");
        }
        public ExtendedTester()
        {
            var testRoot = Path.Combine(Directory.GetCurrentDirectory(), "Templates");

            var pathApp       = Path.Combine(testRoot, "App");
            var pathPackage1  = Path.Combine(pathApp, "fubu-packages", "Package1", "WebContent");
            var pathPackage2  = Path.Combine(testRoot, "Package2");
            var globalPackage = Path.Combine(testRoot, "Global");

            var templateRegistry = new TemplateRegistry <ITemplate>();
            var sparkSet         = new SparkEngineSettings().Search;

            _sharingGraph = new SharingGraph();
            _sharingGraph.Global("Global");
            _sharingGraph.CompileDependencies("Package1", "Package2");

            new ContentFolder(TemplateConstants.HostOrigin, pathApp).FindFiles(sparkSet)
            .Union(new ContentFolder("Package1", pathPackage1).FindFiles(sparkSet)
                   .Union(new ContentFolder("Package2", pathPackage2).FindFiles(sparkSet)
                          .Union(new ContentFolder("Global", globalPackage).FindFiles(sparkSet))))
            .Each(x =>
            {
                if (x.Provenance == TemplateConstants.HostOrigin && x.Path.StartsWith(pathPackage1))
                {
                    return;
                }
                templateRegistry.Register(new Template(x.Path, x.ProvenancePath, x.Provenance));
            });

            var viewPathPolicy = new ViewPathPolicy <ITemplate>();

            templateRegistry.Each(viewPathPolicy.Apply);

            _viewFolder = new TemplateViewFolder(templateRegistry);
            _templateDirectoryProvider = new TemplateDirectoryProvider <ITemplate>(new SharedPathBuilder(), templateRegistry, _sharingGraph);
            _engine = new SparkViewEngine
            {
                ViewFolder      = _viewFolder,
                BindingProvider = new FubuBindingProvider(new SparkTemplateRegistry(templateRegistry)),
                PartialProvider = new FubuPartialProvider(_templateDirectoryProvider)
            };

            _pak1TemplateRegistry   = new TemplateRegistry <ITemplate>(templateRegistry.ByOrigin(Package1));
            _pak2TemplateRegistry   = new TemplateRegistry <ITemplate>(templateRegistry.ByOrigin(Package2));
            _appTemplateRegistry    = new TemplateRegistry <ITemplate>(templateRegistry.FromHost());
            _globalTemplateRegistry = new TemplateRegistry <ITemplate>(templateRegistry.ByOrigin(Global));
        }