e2e-tests (1/4): Repackage gnmi-test-server and e2e test infrastructure

.license-scan-overrides.jsonl

@@ -1,6 +1,7 @@
 {"name": "github.com/chzyer/logex", "licenceType": "MIT"}
 {"name": "github.com/grpc-ecosystem/go-grpc-middleware/v2", "licenceType": "Apache-2.0"}
 {"name": "github.com/hashicorp/vault/api/auth/approle", "licenceType": "MPL-2.0"}
+{"name": "github.com/ironcore-dev/gnmi-test-server", "licenceType": "Apache-2.0"}
 {"name": "github.com/jpillora/longestcommon", "licenceType": "MIT"}
 {"name": "github.com/logrusorgru/aurora", "licenceType": "Unlicense"}
 {"name": "github.com/mattn/go-localereader", "licenceType": "MIT"}

config/develop/gnmi-test-server.yaml

@@ -33,7 +33,7 @@ spec:
       containers:
       - name: gnmi-test-server
         image: ghcr.io/ironcore-dev/gnmi-test-server:latest
-        imagePullPolicy: IfNotPresent
+        imagePullPolicy: Never
         ports:
         - containerPort: 9339
           name: grpc

go.mod

@@ -129,3 +129,5 @@ require (
 	sigs.k8s.io/randfill v1.0.0 // indirect
 	sigs.k8s.io/structured-merge-diff/v6 v6.3.2 // indirect
 )
+
+replace github.com/ironcore-dev/gnmi-test-server => ./test/gnmi

test/e2e/testutil/doc.go

@@ -0,0 +1,16 @@
+// SPDX-FileCopyrightText: 2026 SAP SE or an SAP affiliate company and IronCore contributors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package testutil provides test infrastructure for e2e tests.
+//
+// It supports two test modes selected by build tags:
+//
+//   - Envtest (build tag: envtest): Uses controller-runtime's envtest.Environment
+//     with an in-process gNMI test server. Fast (~10s) but doesn't test deployment.
+//
+//   - Cluster (default): Uses a real Kubernetes cluster (typically Kind) with a
+//     deployed operator and gnmi-test-server pod. Slower (~2-5min) but tests full stack.
+//
+// The concrete types ClusterEnvironment and EnvtestEnvironment provide the same
+// methods, allowing test logic to work with either mode via build tag selection.
+package testutil