feat: test coverage more than 80%

internal/cert/root_ca_test.go

@@ -83,6 +83,12 @@ func Test_newRootCA(t *testing.T) {
 	require.Greater(t, len(keyPEM), 0)
 }
 
+func Test_newRootCAError(t *testing.T) {
+	_, _, err := newRootCA(&ca.CaConfig{})
+
+	require.Error(t, err)
+}
+
 func Test_parseCertificate(t *testing.T) {
 	caPEM, _, err := newRootCA(&rootTestConfig)
 	require.NoError(t, err)
@@ -126,3 +132,12 @@ func Test_rootCA_WithClientCert(t *testing.T) {
 	require.NotNil(t, clientSrv.PEM())
 	require.Greater(t, len(clientSrv.PEM()), 0)
 }
+
+func Test_rootCA_WithClientCertEror(t *testing.T) {
+	rootCert := rootCA{
+		caPEM: nil,
+	}
+
+	_, err := rootCert.WithClientCert(&clientTestConfig)
+	require.Error(t, err)
+}