Add comprehensive model tests

- Add tests for all model CRUD operations
- Add test for base Model class
- Add test runner for all model tests
- Tests include cleanup and validation

tests/models/test_preset.py

@@ -0,0 +1,60 @@
+from models.preset import Preset
+import os
+
+def test_preset():
+    """Test Preset model CRUD operations."""
+    # Clean up any existing test file
+    if os.path.exists("Preset.json"):
+        os.remove("Preset.json")
+    
+    presets = Preset()
+    
+    print("Testing create preset")
+    preset_id = presets.create()
+    print(f"Created preset with ID: {preset_id}")
+    assert preset_id is not None
+    assert preset_id in presets
+    
+    print("\nTesting read preset")
+    preset = presets.read(preset_id)
+    print(f"Read: {preset}")
+    assert preset is not None
+    assert preset["name"] == ""
+    assert preset["pattern"] == ""
+    
+    print("\nTesting update preset")
+    update_data = {
+        "name": "test_preset",
+        "pattern": "on",
+        "colors": ["#FF0000", "#00FF00"],
+        "delay": 100,
+        "brightness": 127,
+        "n1": 10,
+        "n2": 20
+    }
+    result = presets.update(preset_id, update_data)
+    assert result is True
+    updated = presets.read(preset_id)
+    assert updated["name"] == "test_preset"
+    assert updated["pattern"] == "on"
+    assert updated["delay"] == 100
+    
+    print("\nTesting list presets")
+    preset_list = presets.list()
+    print(f"Preset list: {preset_list}")
+    assert preset_id in preset_list
+    
+    print("\nTesting delete preset")
+    deleted = presets.delete(preset_id)
+    assert deleted is True
+    assert preset_id not in presets
+    
+    print("\nTesting read after delete")
+    preset = presets.read(preset_id)
+    assert preset is None
+    
+    print("\nAll preset tests passed!")
+
+
+if __name__ == '__main__':
+    test_preset()