public static Runner BySetupPaths(string workingDirectory, string testAssembly,
            string resultsPath,string testName="", string fixtureName="")
        {
            var products = FindRevit();

            var runner = new Runner
            {
                WorkingDirectory = workingDirectory,
                TestAssembly = testAssembly,
                Test = testName,
                Fixture = fixtureName,
                Results = resultsPath,
                Gui = false,
                RevitPath = Path.Combine(products.First().InstallLocation, "revit.exe")
            };

            return runner;
        }