Make tests more robust to the running environment

tests/conftest.py

@@ -82,3 +82,15 @@ def docs_test_env():
     yield setenv
 
     setenv.clear()
+
+
+@pytest.fixture
+def cli_test_env():
+    setenv = SetEnv()
+
+    # envs for reproducible cli tests
+    setenv.set('COLUMNS', '80')
+
+    yield setenv
+
+    setenv.clear()

tests/test_settings.py

@@ -7,6 +7,7 @@
 from enum import IntEnum
 from pathlib import Path
 from typing import Any, Callable, Dict, Generic, Hashable, List, Optional, Set, Tuple, Type, TypeVar, Union
+from unittest import mock
 
 import pytest
 from annotated_types import MinLen
@@ -68,6 +69,12 @@ class SettingWithPopulateByName(BaseSettings):
     model_config = SettingsConfigDict(populate_by_name=True)
 
 
+@pytest.fixture(autouse=True)
+def clean_env():
+    with mock.patch.dict(os.environ, clear=True):
+        yield
+
+
 def test_sub_env(env):
     env.set('apple', 'hello')
     s = SimpleSettings()
@@ -1109,9 +1116,13 @@ class Settings(BaseSettings):
 
 
 @pytest.fixture
-def home_tmp():
+def home_tmp(tmp_path, env):
+    env.set('HOME', str(tmp_path))
+    env.set('USERPROFILE', str(tmp_path))
+    env.set('HOMEPATH', str(tmp_path))
+
     tmp_filename = f'{uuid.uuid4()}.env'
-    home_tmp_path = Path.home() / tmp_filename
+    home_tmp_path = tmp_path / tmp_filename
     yield home_tmp_path, tmp_filename
     home_tmp_path.unlink()
 

tests/test_source_cli.py

@@ -44,6 +44,11 @@
 ARGPARSE_OPTIONS_TEXT = 'options' if sys.version_info >= (3, 10) else 'optional arguments'
 
 
+@pytest.fixture(autouse=True)
+def cli_test_env_autouse(cli_test_env):
+    pass
+
+
 def foobar(a, b, c=4):
     pass