hasUSER = os.Getenv("USER") != ""
	hasHOME = os.Getenv("HOME") != ""
)

func checkUser(t *testing.T) {
	t.Helper()
	if !userImplemented {
		t.Skip("user: not implemented; skipping tests")
	}
}

func TestCurrent(t *testing.T) {
	old := userBuffer
	defer func() {
		userBuffer = old
	}()
	userBuffer = 1 // force use of retry code
	u, err := Current()
	if err != nil {
		if hasCgo || (hasUSER && hasHOME) {