kubernetes/cmd/kube-controller-manager/app/testing/testserver.go

func init() { … }

type TearDownFunc …

type TestServer …

// StartTestServer starts a kube-controller-manager. A rest client config and a tear-down func,
// and location of the tmpdir are returned.
//
// Note: we return a tear-down func instead of a stop channel because the later will leak temporary
// files that because Golang testing's call to os.Exit will not give a stop channel go routine
// enough time to remove temporary files.
func StartTestServer(ctx context.Context, customFlags []string) (result TestServer, err error) { … }

// StartTestServerOrDie calls StartTestServer t.Fatal if it does not succeed.
func StartTestServerOrDie(ctx context.Context, flags []string) *TestServer { … }

func createListenerOnFreePort() (net.Listener, int, error) { … }