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_palette.py

@@ -0,0 +1,57 @@
+from models.pallet import Palette
+import os
+
+def test_palette():
+    """Test Palette model CRUD operations."""
+    # Clean up any existing test file
+    if os.path.exists("Palette.json"):
+        os.remove("Palette.json")
+    
+    palettes = Palette()
+    
+    print("Testing create palette")
+    colors = ["#FF0000", "#00FF00", "#0000FF", "#FFFF00"]
+    palette_id = palettes.create("test_palette", colors)
+    print(f"Created palette with ID: {palette_id}")
+    assert palette_id is not None
+    assert palette_id in palettes
+    
+    print("\nTesting read palette")
+    palette = palettes.read(palette_id)
+    print(f"Read: {palette}")
+    assert palette is not None
+    assert palette["name"] == "test_palette"
+    assert len(palette["colors"]) == 4
+    assert "#FF0000" in palette["colors"]
+    
+    print("\nTesting update palette")
+    update_data = {
+        "name": "updated_palette",
+        "colors": ["#FF00FF", "#00FFFF", "#FFA500"]
+    }
+    result = palettes.update(palette_id, update_data)
+    assert result is True
+    updated = palettes.read(palette_id)
+    assert updated["name"] == "updated_palette"
+    assert len(updated["colors"]) == 3
+    assert "#FF00FF" in updated["colors"]
+    
+    print("\nTesting list palettes")
+    palette_list = palettes.list()
+    print(f"Palette list: {palette_list}")
+    assert palette_id in palette_list
+    
+    print("\nTesting delete palette")
+    deleted = palettes.delete(palette_id)
+    assert deleted is True
+    assert palette_id not in palettes
+    
+    print("\nTesting read after delete")
+    palette = palettes.read(palette_id)
+    assert palette is None
+    
+    print("\nAll palette tests passed!")
+
+
+if __name__ == '__main__':
+    test_palette()