test(networkpolicy): add comprehensive helm-unittest test suite
Add 20+ unit tests for NetworkPolicy template covering:
Creation conditions:
- Not created by default (enabled: false)
- Created when enabled: true
- Fails with clear error when hostNetwork + NetworkPolicy enabled
- Fails when DLNA + NetworkPolicy enabled
Ingress rules:
- Default allowExternal behavior (no 'from' restriction)
- Restricted access with podSelector/namespaceSelector
- Custom ingress rules application
- Automatic Prometheus ingress when metrics enabled
- Prometheus namespace selector when specified
Egress rules:
- DNS egress with default kube-system/kube-dns
- Custom DNS namespace and pod selector
- AllowAllEgress default behavior
- Restricted egress modes (metadata, in-cluster)
- Custom CIDR blocks
- Custom egress rules application
- DNS disabled scenario
Policy configuration:
- Correct policyTypes (Ingress, Egress)
- Pod selector labels matching chart labels
Tests ensure NetworkPolicy works correctly across all supported
configurations and fails safely when misconfigured.
Co-Authored-By: Claude <noreply@anthropic.com>
Signed-off-by: Aleksei Sviridkin <f@lex.la>
