tests/test_alertmanager_config.py

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import itertools
import unittest
from pathlib import Path
import jinja2
import yaml

class AlertmanagerConfigTests(unittest.TestCase):
    def test_receiver_exists_for_every_notification_combination(self):
        template = jinja2.Template((Path(__file__).resolve().parents[1] / "openserverless/templates/alert-manager-02-cm.yaml").read_text())
        for slack, gmail, slack_default, gmail_default in itertools.product([False, True], repeat=4):
            with self.subTest(slack=slack, gmail=gmail, slack_default=slack_default, gmail_default=gmail_default):
                rendered = template.render(slack=slack, gmail=gmail, slack_default=slack_default, gmail_default=gmail_default,
                    slack_api_url="https://example.test", slack_channel_name="#test", email_recipients="test@example.test",
                    email_from="test@example.test", gmail_username="test@example.test", gmail_password="test")
                config = yaml.safe_load(yaml.safe_load(rendered)["data"]["alertmanager.yml"])
                names = {r["name"] for r in config["receivers"]}
                expected = "email-receiver" if gmail and gmail_default else "slack-notifications" if slack and slack_default else "discard"
                self.assertEqual(config["route"]["receiver"], expected)
                for route in config["route"].get("routes", []): self.assertIn(route["receiver"], names)
                discard = next(r for r in config["receivers"] if r["name"] == "discard")
                self.assertEqual(discard, {"name": "discard"})