Make ignitionISOInjector overridable (like isoInjector already is) to make it mockable for testing

Author: rybnico

internal/service/vmservice/bootstrap.go

@@ -119,7 +119,7 @@ func injectIgnition(ctx context.Context, machineScope *scope.MachineScope, boots
 		Network:       nicData,
 	}
 
-	injector := ignitionISOInjector(machineScope.VirtualMachine, metadata, enricher)
+	injector := getIgnitionISOInjector(machineScope.VirtualMachine, metadata, enricher)
 	if err := injector.Inject(ctx, inject.IgnitionFormat); err != nil {
 		conditions.MarkFalse(machineScope.ProxmoxMachine, infrav1alpha1.VMProvisionedCondition, infrav1alpha1.VMProvisionFailedReason, clusterv1.ConditionSeverityWarning, err.Error())
 		return errors.Wrap(err, "ignition iso inject failed")
@@ -140,15 +140,18 @@ func defaultISOInjector(vm *proxmox.VirtualMachine, bootStrapData []byte, metada
 	}
 }
 
-func ignitionISOInjector(vm *proxmox.VirtualMachine, metadata cloudinit.Renderer, enricher *ignition.Enricher) isoInjector {
+func defaultIgnitionISOInjector(vm *proxmox.VirtualMachine, metadata cloudinit.Renderer, enricher *ignition.Enricher) isoInjector {
 	return &inject.ISOInjector{
 		VirtualMachine:   vm,
 		IgnitionEnricher: enricher,
 		MetaRenderer:     metadata,
 	}
 }
 
-var getISOInjector = defaultISOInjector
+var (
+	getISOInjector         = defaultISOInjector
+	getIgnitionISOInjector = defaultIgnitionISOInjector
+)
 
 // getBootstrapData obtains a machine's bootstrap data from the relevant K8s secret and returns the data.
 // TODO: Add format return if ignition will be supported.

internal/service/vmservice/bootstrap_test.go

@@ -540,7 +540,7 @@ func TestDefaultISOInjector(t *testing.T) {
 }
 
 func TestIgnitionISOInjector(t *testing.T) {
-	injector := ignitionISOInjector(newRunningVM(), cloudinit.NewMetadata(biosUUID, "test", "1.2.3", true), &ignition.Enricher{
+	injector := defaultIgnitionISOInjector(newRunningVM(), cloudinit.NewMetadata(biosUUID, "test", "1.2.3", true), &ignition.Enricher{
 		BootstrapData: []byte("data"),
 		Hostname:      "test",
 	})