Added tests for config and arguments

src/tctools/common.py

@@ -1,9 +1,9 @@
 import logging
 import sys
 from abc import ABC, abstractmethod
-from argparse import ArgumentDefaultsHelpFormatter, ArgumentParser
+from argparse import ArgumentDefaultsHelpFormatter, ArgumentParser, Namespace
 from pathlib import Path
-from typing import List, Optional, Dict, Any
+from typing import Any, Dict, List, Optional
 
 from lxml import etree
 

tests/test_common.py

@@ -0,0 +1,54 @@
+import pytest  # noqa
+
+from tctools.common import Tool
+
+
+class MyTool(Tool):
+    """Dummy tool."""
+
+    CONFIG_KEY = "dummy"
+
+    @classmethod
+    def set_arguments(cls, parser):
+        super().set_arguments(parser)
+
+        parser.add_argument(
+            "--my-option",
+            action="store",
+            default="default-text",
+        )
+        return parser
+
+    def run(self) -> int:
+        return 0  # Do nothing
+
+
+class TestCommon:
+    """Directly test the common interface."""
+
+    def test_cli_arguments(self):
+        tool = MyTool("--my-option", "xyz123")
+        assert tool.args.my_option == "xyz123"
+
+    def test_cli_arguments_default(self):
+        tool = MyTool()
+        assert tool.args.my_option == "default-text"
+
+    def test_config_file(self, tmp_path, monkeypatch):
+        conf_dir = tmp_path / "project"
+        work_dir = conf_dir / "subdir1" / "subdir2"
+        work_dir.mkdir(parents=True)
+
+        conf_file = conf_dir / "tctools.toml"
+        conf_file.write_text(
+            """[tctools.dummy]
+my_option = "xyz123"
+"""
+        )
+
+        monkeypatch.chdir(work_dir)
+
+        tool = MyTool()
+        assert tool.args.my_option == "xyz123"
+
+    # TODO: Add test for section priority