add error messages

corrlib/tools.py

@@ -119,6 +119,8 @@ def get_db_file(path: Path) -> str:
     config = ConfigParser()
     if os.path.exists(config_path):
         config.read(config_path)
+    else:
+        raise FileNotFoundError("Configuration file not found.")
     db_file = config.get('paths', 'db', fallback='backlogger.db')
     return db_file
 
@@ -142,6 +144,10 @@ def cache_enabled(path: Path) -> bool:
     config = ConfigParser()
     if os.path.exists(config_path):
         config.read(config_path)
+    else:
+        raise FileNotFoundError("Configuration file not found.")
     cached_str = config.get('core', 'cached', fallback='True')
+    if cached_str not in ['True', 'False']:
+        raise ValueError(f"String {cached_str} is not a valid option, only True and False are allowed!")
     cached_bool = cached_str == ('True')
     return cached_bool

tests/tools_test.py

@@ -2,6 +2,7 @@ from corrlib import tools as tl
 from configparser import ConfigParser
 import os
 from pathlib import Path
+import pytest
 
 
 def test_m2k() -> None:
@@ -74,7 +75,11 @@ def test_get_db_file(tmp_path: Path) -> None:
 def test_cache_enabled(tmp_path: Path) -> None:
     section = "core"
     option = "cached"
-    value = "True"
     # config is not yet available
-    tl.set_config(tmp_path, section, option, value)
-    assert tl.get_db_file(tmp_path)
+    tl.set_config(tmp_path, section, option, "True")
+    assert tl.cache_enabled(tmp_path)
+    tl.set_config(tmp_path, section, option, "False")
+    assert not tl.cache_enabled(tmp_path)
+    tl.set_config(tmp_path, section, option, "lalala")
+    with pytest.raises(ValueError) as e_info:
+        tl.cache_enabled(tmp_path)