diversion: Add unit tests

tests/logitech_receiver/test_diversion.py

@@ -0,0 +1,42 @@
+from logitech_receiver import diversion
+from logitech_receiver.diversion import Key
+from logitech_receiver.diversion import KeyPress
+from logitech_receiver.diversion import Rule
+
+
+def test_diversion_rule():
+    args = [
+        {
+            "Rule": [  # Implement problematic keys for Craft and MX Master
+                {"Rule": [{"Key": ["Brightness Down", "pressed"]}, {"KeyPress": "XF86_MonBrightnessDown"}]},
+                {"Rule": [{"Key": ["Brightness Up", "pressed"]}, {"KeyPress": "XF86_MonBrightnessUp"}]},
+            ]
+        },
+    ]
+
+    rule = diversion.Rule(args)
+
+    assert len(rule.components) == 1
+    root_rule = rule.components[0]
+    assert isinstance(root_rule, Rule)
+
+    assert len(root_rule.components) == 2
+    for component in root_rule.components:
+        assert isinstance(component, Rule)
+        assert len(component.components) == 2
+
+        key = component.components[0]
+        assert isinstance(key, Key)
+        key = component.components[1]
+        assert isinstance(key, KeyPress)
+
+
+def test_keysym_to_keycode():
+    expected_keycode = 56
+    expected_level = 0
+    keysym_shift_l = 65505
+
+    keycode, level = diversion.keysym_to_keycode(keysym_shift_l, None)
+
+    assert keycode == expected_keycode
+    assert level == expected_level