chore(ci): test protonvpn OpenVPN with port forwarding

ci/internal/protonvpn.go

@@ -27,3 +27,26 @@ func ProtonVPNWireguardPortForwardingTest(ctx context.Context, logger Logger) er
 	const timeout = 80 * time.Second
 	return runContainerTest(ctx, env, []*regexp.Regexp{successRegexp, portForwardingRegexp}, timeout, logger)
 }
+
+func ProtonVPNOpenVPNPortForwardingTest(ctx context.Context, logger Logger) error {
+	expectedSecrets := []string{
+		"OpenVPN username",
+		"OpenVPN password",
+	}
+	secrets, err := readSecrets(ctx, expectedSecrets, logger)
+	if err != nil {
+		return fmt.Errorf("reading secrets: %w", err)
+	}
+
+	env := []string{
+		"VPN_SERVICE_PROVIDER=protonvpn",
+		"VPN_TYPE=openvpn",
+		"LOG_LEVEL=debug",
+		"SERVER_COUNTRIES=United States",
+		"OPENVPN_USER=" + secrets[0],
+		"OPENVPN_PASSWORD=" + secrets[1],
+		"VPN_PORT_FORWARDING=on",
+	}
+	const timeout = 80 * time.Second
+	return runContainerTest(ctx, env, []*regexp.Regexp{successRegexp, portForwardingRegexp}, timeout, logger)
+}