Implemented the full clean rewrite for Gitea

tests/test_config.py

@@ -0,0 +1,55 @@
+from __future__ import annotations
+
+import pytest
+
+from blackout_notifier.config import Config, ConfigurationError
+
+REQUIRED = {
+    "BARGHEMAN_TOKEN": "bargheman",
+    "EITAAYAR_TOKEN": "eitaayar",
+    "CHAT_ID": "chat",
+    "BILL_IDS": " 123,456,123 ,, ",
+}
+
+
+@pytest.fixture(autouse=True)
+def do_not_load_project_dotenv(monkeypatch: pytest.MonkeyPatch) -> None:
+    monkeypatch.setattr("blackout_notifier.config.load_dotenv", lambda **_: None)
+
+
+def test_config_parses_and_deduplicates_bill_ids(monkeypatch: pytest.MonkeyPatch) -> None:
+    for name, value in REQUIRED.items():
+        monkeypatch.setenv(name, value)
+
+    config = Config.from_env()
+
+    assert config.bill_ids == ("123", "456")
+    assert str(config.state_file) == "state/outages.json"
+    assert config.lookahead_days == 5
+
+
+def test_config_reports_all_missing_required_values(monkeypatch: pytest.MonkeyPatch) -> None:
+    for name in REQUIRED:
+        monkeypatch.delenv(name, raising=False)
+
+    expected = "BARGHEMAN_TOKEN.*EITAAYAR_TOKEN.*CHAT_ID.*BILL_IDS"
+    with pytest.raises(ConfigurationError, match=expected):
+        Config.from_env()
+
+
+def test_config_rejects_non_decimal_bill_ids(monkeypatch: pytest.MonkeyPatch) -> None:
+    for name, value in REQUIRED.items():
+        monkeypatch.setenv(name, value)
+    monkeypatch.setenv("BILL_IDS", "123,761/pe9314604429")
+
+    with pytest.raises(ConfigurationError, match="decimal IDs"):
+        Config.from_env()
+
+
+def test_config_validates_numeric_ranges(monkeypatch: pytest.MonkeyPatch) -> None:
+    for name, value in REQUIRED.items():
+        monkeypatch.setenv(name, value)
+    monkeypatch.setenv("LOOKAHEAD_DAYS", "0")
+
+    with pytest.raises(ConfigurationError, match="between 1 and 30"):
+        Config.from_env()