initial commit: added regression tests for Altinity ClickHouse Helm c… (#72)

* initial commit: added regression tests for Altinity ClickHouse Helm charts

* feat: add service configuration test for ClickHouse with LoadBalancer. enabled check_persistence_configuration

Author: Elmo33

tests/README.md

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+<img align="right" style="width: 5em;" src="https://github.com/user-attachments/assets/1e97270f-7925-4cc2-8791-8d0cc77fe512">
+
+
+#  Regression Tests for Altinity ClickHouse Helm Charts
+
+This repository contains comprehensive regression tests for Altinity ClickHouse Helm charts, ensuring proper deployment and configuration of ClickHouse clusters in Kubernetes environments.
+
+##  Table of Contents
+
+* [Supported Environment](#supported-environment)
+* [Prerequisites](#prerequisites)
+  * [Kubernetes Cluster](#kubernetes-cluster)
+  * [Helm](#helm)
+  * [Python Modules](#python-modules)
+* [How to Run the Tests](#-how-to-run-the-tests)
+* [Contributing](#contributing)
+
+
+##  Supported Environment
+
+- [Ubuntu](https://ubuntu.com/) 22.04 / 24.04
+- [Python](https://www.python.org/downloads/) >= 3.10.12
+- [Kubernetes](https://kubernetes.io/) >= 1.24
+- [Helm](https://helm.sh/) >= 3.8.0
+- [Minikube](https://minikube.sigs.k8s.io/) >= 1.28.0 (for local testing)
+
+##  Prerequisites
+
+To install the necessary prerequisites, follow the instructions below:
+
+###  Kubernetes Cluster
+
+You need access to a Kubernetes cluster. For local testing, you can use Minikube:
+
+```bash
+# Install Minikube
+curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
+sudo install minikube-linux-amd64 /usr/local/bin/minikube
+```
+
+###  Helm
+
+To install Helm, follow the instructions below:
+
+```bash
+# Install Helm
+curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash
+
+# Verify installation
+helm version
+```
+
+###  Python Modules
+
+To install all necessary Python modules, execute the following command:
+
+```bash
+pip3 install -r tests/requirements.txt
+```
+
+##  How to Run the Tests
+
+To run the tests execute the test script:
+
+```bash
+python3 ./tests/run/smoke.py
+```
+
+## Contributing
+
+When adding new tests:
+
+1. Follow the existing test structure
+2. Add appropriate test steps in the `steps/` directory
+3. Ensure tests are idempotent and clean up after themselves
+4. Add proper error handling and timeouts
+

tests/__init__.py

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+import os
+from testflows.core import Secret
+
+def argparser(parser):
+    """Parse common arguments for the tests."""
+
+    parser.add_argument(
+        "--feature",
+        metavar="name",
+        type=str,
+        help="Test Feature name",
+        required=False,
+    )
+
+    pass

tests/helpers/__init__.py

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+requests==2.32.3
+testflows==2.4.13
+testflows.texts==2.0.211217.1011222