Add E2E test for metrics

* Reduce regression risk for Sys team

.gitlab-ci.yml

@@ -41,9 +41,11 @@ run-test-job:
     - source "$CI_PROJECT_DIR/plugins/venv/bin/activate"
     - pip install -r "$CI_PROJECT_DIR/plugins/netbox-rps-plugin/tests/requirements.e2e.txt"
     - pip install -r "$CI_PROJECT_DIR/plugins/netbox-cert-plugin/tests/requirements.e2e.txt"
+    - pip install -r "$CI_PROJECT_DIR/tests/requirements.e2e.txt"
   script:
     - env HOST="$HOST" PORT="$PORT" API_KEY="$API_KEY" python3 -m unittest discover -b "$CI_PROJECT_DIR/plugins/netbox-rps-plugin/tests/"
     - env HOST="$HOST" PORT="$PORT" API_KEY="$API_KEY" python3 -m unittest discover -b "$CI_PROJECT_DIR/plugins/netbox-cert-plugin/tests/"
+    - env HOST="$HOST" PORT="$PORT" API_KEY="$API_KEY" python3 -m unittest discover -b "$CI_PROJECT_DIR/tests/"
   after_script:
     - env ANSIBLE_HOST_KEY_CHECKING=false ANSIBLE_PRIVATE_KEY_FILE="$ANSIBLE_PRIVATE_KEY_FILE" ansible-playbook -i "$TESTING_HOSTS" -u debian ansible/halt_test.yml
     - deactivate

tests/README.md

+# Testing the plugin
+
+## End to end
+
+Prepare a python environment to execute the E2E tests suite
+
+```shell
+python3 -m venv venv
+source venv/bin/activate
+pip install -r tests/requirements.e2e.txt
+python -m unittest discover tests/e2e
+```

tests/e2e/netbox/test_metrics.py

+"""Test case for Mapping creation"""
+
+import unittest
+import os
+import requests
+
+
+HOST = os.getenv("HOST", default="localhost")
+PORT = os.getenv("PORT", default="8080")
+
+
+class TestNetboxMetrics(unittest.TestCase):
+    """Test case for Netbox Metrics"""
+
+    def test_that_netbox_metrics_is_activated(self) -> None:
+        """Test that Netbox Metrics is activated"""
+
+        response = requests.get(
+            url=f"http://{HOST}:{PORT}/metrics",
+            timeout=5,
+        )
+
+        self.assertEqual(response.status_code, 200)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/requirements.e2e.txt

+requests==2.30.0