AI Implementation feature(1082): Project Scaffold and Docker Packaging (#1)

tests/test_config.py

@@ -0,0 +1,103 @@
+from __future__ import annotations
+
+import os
+from pathlib import Path
+
+import pytest
+
+from tenbackward.config import ConfigError, load_config, validate_config
+
+
+def _populate(env_setup) -> dict[str, str]:
+    return {k: os.environ[k] for k in os.environ if k.startswith(("MASTODON_", "SITE_", "HASHTAGS", "RUN_AT", "THROWBACK_", "RETRY_", "TZ"))}
+
+
+def test_load_config_succeeds_with_complete_env(env_setup) -> None:
+    config = load_config()
+    assert config.mastodon_base_url == "https://mastodon.example"
+    assert config.run_at == "09:00"
+    assert config.retry_count == 3
+    assert config.throwback_prefix == "Throwback:"
+
+
+def test_validate_config_lists_every_missing_key(env_setup, monkeypatch) -> None:
+    monkeypatch.delenv("MASTODON_ACCESS_TOKEN")
+    monkeypatch.delenv("SITE_URL")
+
+    values = {k: os.environ.get(k, "") for k in [
+        "MASTODON_BASE_URL",
+        "MASTODON_ACCESS_TOKEN",
+        "SITE_URL",
+        "HASHTAGS",
+        "RUN_AT",
+    ]}
+
+    with pytest.raises(ConfigError) as excinfo:
+        validate_config(values)
+
+    message = str(excinfo.value)
+    assert "MASTODON_ACCESS_TOKEN" in message
+    assert "SITE_URL" in message
+
+
+def test_validate_config_rejects_bad_run_at() -> None:
+    values = {
+        "MASTODON_BASE_URL": "https://mastodon.example",
+        "MASTODON_ACCESS_TOKEN": "x",
+        "SITE_URL": "https://blog.example.com",
+        "HASHTAGS": "#x",
+        "RUN_AT": "25:99",
+        "MASTODON_VISIBILITY": "public",
+        "THROWBACK_PREFIX": "Throwback:",
+        "RETRY_COUNT": "3",
+        "TZ": "Europe/Berlin",
+    }
+    with pytest.raises(ConfigError):
+        validate_config(values)
+
+
+def test_load_config_applies_optional_defaults(env_setup, monkeypatch) -> None:
+    monkeypatch.delenv("THROWBACK_PREFIX", raising=False)
+    monkeypatch.delenv("RETRY_COUNT", raising=False)
+
+    config = load_config()
+    assert config.throwback_prefix == "Throwback:"
+    assert config.retry_count == 3
+    assert config.tz == "Europe/Berlin"
+    assert config.mastodon_visibility == "public"
+
+
+def test_load_config_reads_dotenv_file(tmp_path: Path, monkeypatch) -> None:
+    dotenv = tmp_path / ".env"
+    dotenv.write_text(
+        "MASTODON_BASE_URL=https://from-file.example\n"
+        "MASTODON_ACCESS_TOKEN=file-token\n"
+        "SITE_URL=https://blog.example.com\n"
+        "HASHTAGS=#throwback\n"
+        "RUN_AT=12:34\n"
+    )
+
+    for key in ("MASTODON_BASE_URL", "MASTODON_ACCESS_TOKEN", "SITE_URL", "HASHTAGS", "RUN_AT"):
+        monkeypatch.delenv(key, raising=False)
+
+    config = load_config(dotenv_path=dotenv)
+    assert config.mastodon_base_url == "https://from-file.example"
+    assert config.mastodon_access_token == "file-token"
+    assert config.run_at == "12:34"
+
+
+def test_env_overrides_dotenv(tmp_path: Path, monkeypatch) -> None:
+    dotenv = tmp_path / ".env"
+    dotenv.write_text("RUN_AT=01:00\n")
+
+    monkeypatch.setenv("RUN_AT", "23:00")
+    for key in (
+        "MASTODON_BASE_URL",
+        "MASTODON_ACCESS_TOKEN",
+        "SITE_URL",
+        "HASHTAGS",
+    ):
+        monkeypatch.setenv(key, "x")
+
+    config = load_config(dotenv_path=dotenv)
+    assert config.run_at == "23:00"