--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/velib_python/test/mock_settings_device.py	Sun Dec 05 14:35:36 2021 +1030
@@ -0,0 +1,57 @@
+PATH = 0
+VALUE = 1
+MINIMUM = 2
+MAXIMUM = 3
+
+
+class MockSettingsItem(object):
+    def __init__(self, parent, path):
+        self._parent = parent
+        self.path = path
+
+    def get_value(self):
+        setting = 'addSetting'+self.path
+        if setting in self._parent._settings:
+            return self._parent[setting]
+        return None
+
+    def set_value(self, value):
+        self._parent['addSetting'+self.path] = value
+
+    @property
+    def exists(self):
+        return 'addSetting'+self.path in self._parent._settings
+
+# Simulates the SettingsSevice object without using the D-Bus (intended for unit tests). Values passed to
+# __setitem__ (or the [] operator) will be stored in memory for later retrieval by __getitem__.
+class MockSettingsDevice(object):
+    def __init__(self, supported_settings, event_callback, name='com.victronenergy.settings', timeout=0):
+        self._dbus_name = name
+        self._settings = supported_settings
+        self._event_callback = event_callback
+
+    def addSetting(self, path, value, _min, _max, silent=False, callback=None):
+        # Persist in our settings stash so the settings is available through
+        # the mock item
+        self._settings['addSetting'+path] = [path, value, _min, _max, silent]
+        return MockSettingsItem(self, path)
+
+    def get_short_name(self, path):
+        for k,v in self._settings.items():
+            if v[PATH] == path:
+                return k
+        return None
+
+    def __getitem__(self, setting):
+        return self._settings[setting][VALUE]
+
+    def __setitem__(self, setting, new_value):
+        s = self._settings.get(setting, None)
+        if s is None:
+            raise Exception('setting not found') 
+        old_value = s[VALUE] 
+        if old_value == new_value:
+            return
+        s[VALUE] = new_value
+        if self._event_callback is not None:
+            self._event_callback(setting, old_value, new_value)