public void Returns_Null_If_The_PackageSource_Is_Empty()
            {
                var nuGetBasedModuleCatalog = new NuGetBasedModuleCatalog { PackageSource = string.Empty };
                var packageRepository = nuGetBasedModuleCatalog.GetPackageRepositories().First();

                Assert.IsNull(packageRepository);
            }
 public void Returns_Null_If_The_PackageSource_Has_Incorrect_Format()
 {
     var nuGetBasedModuleCatalog = new NuGetBasedModuleCatalog { PackageSource = "2344:2345982345:" };
     var packageRepository = nuGetBasedModuleCatalog.GetPackageRepository();
     Assert.IsNull(packageRepository);
 }