Fix bug in healthcheck

tests/test_healthcheck.py

@@ -0,0 +1,69 @@
+from __future__ import annotations
+
+from unittest.mock import MagicMock
+from unittest.mock import patch
+
+import pytest
+import requests
+
+from discord_rss_bot.healthcheck import healthcheck
+
+
+def test_healthcheck_success() -> None:
+    """Test that healthcheck exits with 0 when the website is up."""
+    mock_response = MagicMock()
+    mock_response.ok = True
+
+    with (
+        patch("discord_rss_bot.healthcheck.requests.get", return_value=mock_response),
+        pytest.raises(SystemExit) as exc_info,
+    ):
+        healthcheck()
+
+    assert exc_info.value.code == 0
+
+
+def test_healthcheck_not_ok() -> None:
+    """Test that healthcheck exits with 1 when the response is not ok."""
+    mock_response = MagicMock()
+    mock_response.ok = False
+
+    with (
+        patch("discord_rss_bot.healthcheck.requests.get", return_value=mock_response),
+        pytest.raises(SystemExit) as exc_info,
+    ):
+        healthcheck()
+
+    assert exc_info.value.code == 1
+
+
+def test_healthcheck_request_exception(capsys: pytest.CaptureFixture) -> None:
+    """Test that healthcheck exits with 1 on a request exception."""
+    with (
+        patch(
+            "discord_rss_bot.healthcheck.requests.get",
+            side_effect=requests.exceptions.ConnectionError("Connection refused"),
+        ),
+        pytest.raises(SystemExit) as exc_info,
+    ):
+        healthcheck()
+
+    assert exc_info.value.code == 1
+    captured = capsys.readouterr()
+    assert "Healthcheck failed" in captured.err
+
+
+def test_healthcheck_timeout(capsys: pytest.CaptureFixture) -> None:
+    """Test that healthcheck exits with 1 on a timeout."""
+    with (
+        patch(
+            "discord_rss_bot.healthcheck.requests.get",
+            side_effect=requests.exceptions.Timeout("Request timed out"),
+        ),
+        pytest.raises(SystemExit) as exc_info,
+    ):
+        healthcheck()
+
+    assert exc_info.value.code == 1
+    captured = capsys.readouterr()
+    assert "Healthcheck failed" in captured.err