Merge branch '3-reload-implementation' into 'master'

Resolve "reload implementieren"

Closes #3

See merge request !2

config_provider.py

 class ConfigProvider:
 
-  def __init__(self, load_function, *args, **kwargs):
-    self._conf_dict = load_function(*args, **kwargs)
+  def __init__(self, load_function):
+    self._conf_dict = load_function['function'](
+      *load_function.get('args'), **load_function.get('kwargs'))
+    self._load_function = load_function
 
   @property
   def dict(self):
     return self._conf_dict
+
+  def reload(self):
+    self._conf_dict = self._load_function['function'](
+      *self._load_function.get('args'), **self._load_function.get('kwargs'))
\ No newline at end of file

test/test_config_provider.py

@@ -3,7 +3,45 @@ import config_provider
 
 class TestConfigProvider(unittest.TestCase):
 
+  def setUp(self):
+    self.dummy_config = {
+      'A': 'a',
+      'B': 'b'}
+    def read_dummy_conf(self, **kwargs):
+      conf_dict = dict(self.dummy_config, **kwargs)
+      return conf_dict
+    self.read_function = read_dummy_conf
+    self.config = config_provider.ConfigProvider(
+      load_function = {
+        'function': self.read_function, 'args': [self],
+        'kwargs': {'salt': 'pepper'}})
+
   def test_init(self):
     config = config_provider.ConfigProvider(
-      load_function = dict, foo = 'bar')
-    self.assertEqual({'foo': 'bar'}, config.dict)
+      load_function = {
+        'function': self.read_function, 'args': [self],
\ No newline at end of file
+        'kwargs': {'foo': 'bar'}})
+    self.assertEqual({'foo': 'bar', 'A': 'a', 'B': 'b'}, config.dict)
+
+  def test_reload(self):
+    old_dict = dict(self.config.dict)
+    self.dummy_config = {'A': 'a1', 'B': 'b'}
+    expected_dict = {'A': 'a1', 'B': 'b', 'salt': 'pepper'}
+    with self.subTest(
+        'before Reload: self.config.dict = ' + str(self.config.dict)
+        + ' old_dict = ' + str(old_dict) + ' self.dummy_config = '
+        + str(self.dummy_config)):
+      self.assertEqual(
+        old_dict, self.config.dict, 'old_dict musst equal self.config.dict')
+      self.assertNotEqual(
+        self.dummy_config, self.config.dict,
+        'self.dummy_config musst not equal self.config.dict')
+    self.config.reload()
+    with self.subTest('after Reload: self.config.dict = ' + str(self.config.dict)
+        + ' old_dict = ' + str(old_dict) + ' self.dummy_config = '
+        + str(self.dummy_config)):
+      self.assertEqual(
+        expected_dict, self.config.dict,
+        'expected_dict musst equal self.config.dict')
+      self.assertNotEqual(
+        old_dict, self.config.dict, 'old_dict musst not equal self.config.dict')
\ No newline at end of file