Add simple test

tests/test_configuration.py

@@ -22,3 +22,12 @@ def test_process_click_context(arg_dict: 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()])
+
+
+def test_yaml_file_read():
+    file = './yaml_test_configuration.yaml'
+    test_config = Configuration()
+    test_config.parse_yaml_options(file)
+    assert test_config.subreddit == ['EarthPorn', 'TwoXChromosomes', 'Mindustry']
+    assert test_config.sort == 'new'
+    assert test_config.limit == 10