Add function to process click contexts for config

bulkredditdownloader/tests/test_configuration.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python3
+# coding=utf-8
+
+from unittest.mock import MagicMock
+
+import pytest
+
+from bulkredditdownloader.configuration import Configuration
+
+
+@pytest.mark.parametrize('arg_dict', (
+    {'directory': 'test_dir'},
+    {'directory': 'test_dir', 'no_dupes': True},
+))
+def test_process_click_context(arg_dict: dict):
+    test_config = Configuration()
+    test_context = MagicMock()
+    test_context.params = arg_dict
+    test_config.process_click_arguments(test_context)
+    test_config = vars(test_config)
+    assert all([test_config[arg] == arg_dict[arg] for arg in arg_dict.keys()])