afterhours-shift-manager/tests/release_notifier/test_handler.py

"""Tests for the release-notifier Lambda handler."""

from unittest.mock import MagicMock

import pytest


@pytest.fixture
def slack(notifier_app, monkeypatch):
    """Fake Slack WebClient; chat_postMessage returns a message ts."""
    fake = MagicMock(name="slack")
    fake.chat_postMessage.return_value = {"ts": "111.222"}
    monkeypatch.setattr(notifier_app, "WebClient", MagicMock(return_value=fake))
    monkeypatch.setattr(notifier_app, "get_secret", lambda _id: "xoxb-test")
    return fake


@pytest.fixture
def env(monkeypatch):
    monkeypatch.setenv(
        "SLACK_BOT_TOKEN_SECRET", "afterhours-shift-manager/slack-bot-token"
    )
    monkeypatch.setenv("SHIFT_CHANNEL", "C_RELEASES")


def test_posts_announcement_to_channel(notifier_app, slack, env):
    result = notifier_app.handler(
        {
            "version": "1.10.0",
            "notes": "**Release notes** now self-announce.",
            "date_label": "June 11, 2026",
        },
        None,
    )

    assert result == {"announced": True, "version": "1.10.0", "ts": "111.222"}
    slack.chat_postMessage.assert_called_once()
    kwargs = slack.chat_postMessage.call_args.kwargs
    assert kwargs["channel"] == "C_RELEASES"
    assert kwargs["text"] == "What's New — v1.10.0"
    # Markdown was converted to Slack mrkdwn in the rendered blocks.
    rendered = str(kwargs["blocks"])
    assert "*Release notes*" in rendered


def test_uses_the_slack_bot_token_secret(notifier_app, slack, env, monkeypatch):
    seen = {}
    monkeypatch.setattr(
        notifier_app, "get_secret", lambda sid: seen.setdefault("id", sid) or "xoxb"
    )
    notifier_app.handler({"version": "2.0.0", "notes": "Big."}, None)
    assert seen["id"] == "afterhours-shift-manager/slack-bot-token"


@pytest.mark.parametrize(
    "event",
    [
        {},
        {"version": "1.10.0"},  # missing notes
        {"notes": "x"},  # missing version
        {"version": "", "notes": "x"},  # empty version
    ],
)
def test_rejects_incomplete_event(notifier_app, slack, env, event):
    with pytest.raises(ValueError):
        notifier_app.handler(event, None)
    slack.chat_postMessage.assert_not_called()