lib: Implement save and load functions for settings

Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>

lib/settings.py

@@ -1,7 +1,9 @@
 # Copyright 2021 (c) Anna Schumaker.
+from. import data
 import configparser
 import threading
 
+config_file = "settings.cfg"
 config = configparser.ConfigParser()
 lock = threading.Lock()
 
@@ -37,6 +39,14 @@ def set(setting, value):
         if not config.has_section(section):
             config.add_section(section)
         config.set(section, key, str(value))
+        with data.DataFile(config_file, data.WRITE_TEXT) as f:
+            config.write(f.file)
+
+def load():
+    with data.DataFile(config_file, data.READ_TEXT) as f:
+        if f.exists():
+            config.read_file(f.file)
 
 def reset():
     config.clear()
+    data.DataFile(config_file, data.WRITE_TEXT).remove()

lib/test_settings.py

@@ -1,21 +1,28 @@
 # Copyright 2021 (c) Anna Schumaker.
+from . import data
 from . import settings
 import configparser
 import threading
 import unittest
 
 class TestSettings(unittest.TestCase):
+    def setUp(self):
+        self.cfg_file = data.DataFile(settings.config_file, data.READ_TEXT)
+
     def tearDown(self):
         settings.reset()
 
     def test_init(self):
+        self.assertEqual(settings.config_file, "settings.cfg")
         self.assertIsInstance(settings.config, configparser.ConfigParser)
         self.assertIsInstance(settings.lock, type(threading.Lock()))
 
     def test_set_get(self):
         self.assertIsNone(settings.get("test.key"))
 
+        self.assertFalse(self.cfg_file.exists())
         settings.set("test.key", 42)
+        self.assertTrue(self.cfg_file.exists())
         self.assertEqual(settings.get("test.key"), "42")
         self.assertIsNone(settings.get("test.nokey"))
         self.assertEqual(settings.get("test.nokey", 1), 1)
@@ -28,7 +35,25 @@ class TestSettings(unittest.TestCase):
         settings.set("test.bool", True)
         self.assertTrue(settings.get_bool("test.bool"))
 
+    def test_load(self):
+        settings.load()
+
+        settings.set("test.key1", 1)
+        settings.set("test.key2", 2)
+        settings.set("test.key3", True)
+        settings.set("test.key4", 4.2)
+
+        settings.config.clear()
+        settings.load()
+
+        self.assertEqual(settings.get_int("test.key1"), 1)
+        self.assertEqual(settings.get_int("test.key2"), 2)
+        self.assertEqual(settings.get_bool("test.key3"), True)
+        self.assertEqual(settings.get_float("test.key4"), 4.2)
+
     def test_reset(self):
         settings.set("test.key", 42)
+        self.assertTrue(self.cfg_file.exists())
         settings.reset()
         self.assertIsNone(settings.get("test.key"))
+        self.assertFalse(self.cfg_file.exists())