private static async Task <string> CreatePython27AndFlask012EnvAsync(CondaEnvironmentManager mgr, MockCondaEnvironmentManagerUI ui, string name)
        {
            var envPath = Path.Combine(TestData.GetTempPath(), name);
            var result  = await mgr.CreateAsync(envPath, Python27AndFlask012Packages, ui, CancellationToken.None);

            Assert.IsTrue(result, "Create failed.");
            AssertCondaMetaFiles(envPath, "flask-*.json", "python-2.7.*.json");

            ui.Clear();

            return(envPath);
        }