[no-relnote] Add E2E README documentation

Signed-off-by: Carlos Eduardo Arango Gutierrez <[email protected]>

Author: ArangoGutierrez

tests/e2e/README.md

@@ -0,0 +1,82 @@
+<!--
+SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+SPDX-License-Identifier: Apache-2.0
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
+
+# NVIDIA DRA GPU Driver E2E Test Suite
+
+This directory contains the end-to-end (E2E) test suite for the [NVIDIA Kubernetes DRA GPU Driver](https://github.com/NVIDIA/k8s-dra-driver-gpu). It is implemented using [Ginkgo v2](https://onsi.github.io/ginkgo/) and [Gomega](https://onsi.github.io/gomega/) and validates driver deployment and functionality in a real Kubernetes cluster.
+
+## Requirements
+
+- Kubernetes cluster (v1.26+ recommended)
+- Configured `KUBECONFIG` pointing to target cluster
+- Go 1.21+
+- Required environment variables (see below)
+
+## Environment Variables
+
+| Variable                   | Required | Description                                              |
+|----------------------------|----------|----------------------------------------------------------|
+| `KUBECONFIG`               | ✅       | Path to kubeconfig file                                  |
+| `HELM_CHART`               | ✅       | Path or name of the Helm chart for the DRA driver        |
+| `E2E_IMAGE_REPO`           | ✅       | Container image repository for the driver                |
+| `E2E_IMAGE_TAG`            | ✅       | Image tag for the driver                                 |
+| `E2E_IMAGE_PULL_POLICY`    | ✅       | Pull policy for the image (e.g., `IfNotPresent`)         |
+| `E2E_TIMEOUT_SECONDS`      | ❌       | Timeout for test suite in seconds (default: 1800)        |
+| `E2E_HOST_MANAGED_DRIVERS` | ❌       | Whether host manages the NVIDIA driver (default: true)   |
+| `LOG_ARTIFACTS_DIR`        | ❌       | Path to store logs and diagnostics (default: ./e2e_logs) |
+| `COLLECT_LOGS_FROM`        | ❌       | Namespace or component to collect logs from              |
+
+## Makefile Targets
+
+The project includes a `Makefile` with the following targets:
+
+```Makefile
+GINKGO_ARGS ?=
+LOG_ARTIFACTS_DIR ?= $(CURDIR)/e2e_logs
+
+ginkgo:
+	mkdir -p $(CURDIR)/bin
+	GOBIN=$(CURDIR)/bin go install github.com/onsi/ginkgo/v2/ginkgo@latest
+
+test-e2e: ginkgo
+	$(CURDIR)/bin/ginkgo $(GINKGO_ARGS) -v --json-report $(CURDIR)/ginkgo.json ./tests/e2e/...
+```
+
+## Running the Tests
+
+You can run the test suite using:
+
+```bash
+make test-e2e
+```
+
+Or manually:
+
+```bash
+make ginkgo
+./bin/ginkgo -v ./tests/e2e
+```
+
+## Notes
+
+- Each test runs in an isolated namespace and cleans up automatically.
+- Node labels `nvidia.com/gpu.present=true` are applied for scheduling.
+- Helm values can be overridden for container-managed drivers.
+
+## License
+
+Apache 2.0. See [LICENSE](../LICENSE).