how_go_create_http_client_given_cert_data.go

func httpClientForCert(t *testing.T, caData, certData, keyData []byte) *http.Client {
	cert, err := tls.X509KeyPair(certData, keyData)
	require.NoError(t, err)

	caCertPool := x509.NewCertPool()
	require.True(t, caCertPool.AppendCertsFromPEM(caData))

	// Setup HTTPS client
	tlsConfig := &tls.Config{
		MinVersion: tls.VersionTLS12,
		Certificates: []tls.Certificate{
			cert,
		},
		RootCAs: caCertPool,
	}
	transport := &http.Transport{
		TLSClientConfig: tlsConfig,
	}
	client := &http.Client{
		Transport: transport,
	}
	return client
}