Add test

pyproject.toml

@@ -12,7 +12,11 @@ dependencies = [
 ]
 
 [dependency-groups]
-dev = ["pytest-asyncio", "pytest", "ruff"]
+dev = [
+    "pytest-asyncio",
+    "pytest",
+    "ruff",
+]
 
 [tool.ruff]
 # https://docs.astral.sh/ruff/linter/
@@ -54,18 +58,18 @@ lint.pydocstyle.convention = "google"
 # Add "from __future__ import annotations" to all files
 lint.isort.required-imports = ["from __future__ import annotations"]
 
+lint.pycodestyle.ignore-overlong-task-comments = true
+
 # Default is 88 characters
 line-length = 120
 
-lint.pycodestyle.ignore-overlong-task-comments = true
-
 [tool.ruff.format]
 # https://docs.astral.sh/ruff/formatter/
 docstring-code-format = true
 docstring-code-line-length = 20
 
 [tool.ruff.lint.per-file-ignores]
-"**/tests/**" = [
+"**/*_test.py" = [
     "ARG",     # Unused function args -> fixtures nevertheless are functionally relevant...
     "FBT",     # Don't care about booleans as positional arguments in tests, e.g. via @pytest.mark.parametrize()
     "PLR2004", # Magic value used in comparison, ...
@@ -81,5 +85,5 @@ log_cli_level = "INFO"
 log_cli_format = "%(asctime)s [%(levelname)8s] %(message)s (%(filename)s:%(lineno)s)"
 log_cli_date_format = "%Y-%m-%d %H:%M:%S"
 
-# Only check /tests/ directory for tests.
-testpaths = ["tests"]
+# Only test files with the following suffixes.
+python_files = "test_*.py *_test.py *_tests.py"