[node operator] ScalingGroupController env test

Signed-off-by: Malte Poll <mp@edgeless.systems>

operators/constellation-node-operator/controllers/scalinggroup_controller_test.go

@@ -0,0 +1,30 @@
+package controllers
+
+import (
+	"context"
+	"sync"
+)
+
+type fakeScalingGroupUpdater struct {
+	sync.RWMutex
+	scalingGroupImage map[string]string
+}
+
+func newFakeScalingGroupUpdater() *fakeScalingGroupUpdater {
+	return &fakeScalingGroupUpdater{
+		scalingGroupImage: make(map[string]string),
+	}
+}
+
+func (u *fakeScalingGroupUpdater) GetScalingGroupImage(ctx context.Context, scalingGroupID string) (string, error) {
+	u.RLock()
+	defer u.RUnlock()
+	return u.scalingGroupImage[scalingGroupID], nil
+}
+
+func (u *fakeScalingGroupUpdater) SetScalingGroupImage(ctx context.Context, scalingGroupID, imageURI string) error {
+	u.Lock()
+	defer u.Unlock()
+	u.scalingGroupImage[scalingGroupID] = imageURI
+	return nil
+}