refactor template

{{cookiecutter.project_slug}}/tests/test_internals.py

@@ -0,0 +1,32 @@
+from __future__ import annotations
+
+from {{ cookiecutter.package_name }}.commands import format_greeting
+from {{ cookiecutter.package_name }}.config import get_config, get_config_source
+from {{ cookiecutter.package_name }}.config.paths import ENV_CONFIG_VAR
+
+
+def test_env_config_override(tmp_path, monkeypatch) -> None:
+    config_path = tmp_path / "config.toml"
+    config_path.write_text("greeting = \"Hi\"\n")
+    monkeypatch.setenv(ENV_CONFIG_VAR, str(config_path))
+
+    settings = get_config()
+
+    assert settings.greeting == "Hi"
+    assert get_config_source() == config_path
+
+
+def test_missing_env_config_raises(tmp_path, monkeypatch) -> None:
+    missing = tmp_path / "missing.toml"
+    monkeypatch.setenv(ENV_CONFIG_VAR, str(missing))
+
+    try:
+        get_config()
+    except FileNotFoundError as exc:
+        assert str(missing) in str(exc)
+    else:
+        raise AssertionError("Expected FileNotFoundError")
+
+
+def test_format_greeting() -> None:
+    assert format_greeting("Ada") == "Hello, Ada!"