bazel: allow "bazel test" to work without cgo dependencies

hack/qemu-metadata-api/server/server_cgo_test.go

@@ -0,0 +1,41 @@
+//go:build cgo
+
+/*
+Copyright (c) Edgeless Systems GmbH
+
+SPDX-License-Identifier: AGPL-3.0-only
+*/
+
+package server
+
+import (
+	"github.com/edgelesssys/constellation/v2/hack/qemu-metadata-api/virtwrapper"
+	"libvirt.org/go/libvirt"
+)
+
+type stubNetwork struct {
+	leases      []libvirt.NetworkDHCPLease
+	getLeaseErr error
+}
+
+func newStubNetwork(leases []virtwrapper.NetworkDHCPLease, getLeaseErr error) stubNetwork {
+	libvirtLeases := make([]libvirt.NetworkDHCPLease, len(leases))
+	for i, l := range leases {
+		libvirtLeases[i] = libvirt.NetworkDHCPLease{
+			IPaddr:   l.IPaddr,
+			Hostname: l.Hostname,
+		}
+	}
+	return stubNetwork{
+		leases:      libvirtLeases,
+		getLeaseErr: getLeaseErr,
+	}
+}
+
+func (n stubNetwork) GetDHCPLeases() ([]libvirt.NetworkDHCPLease, error) {
+	return n.leases, n.getLeaseErr
+}
+
+func (n stubNetwork) Free() error {
+	return nil
+}