test: Add unit tests for FrontendStyle class

backend/experiment/tests/test_frontend_style.py

@@ -0,0 +1,64 @@
+import unittest
+
+from experiment.actions.frontend_style import FrontendStyle
+
+class TestFrontendStyle(unittest.TestCase):
+
+    def test_init_with_valid_root_style(self):
+        style = FrontendStyle(FrontendStyle.PRIMARY)
+        self.assertEqual(style.get_style('root'), FrontendStyle.PRIMARY)
+
+    def test_init_with_invalid_root_style(self):
+        with self.assertRaises(ValueError):
+            FrontendStyle("invalid-style")
+
+    def test_init_with_valid_nested_styles(self):
+        nested_style = FrontendStyle(FrontendStyle.SUCCESS)
+        style = FrontendStyle(FrontendStyle.PRIMARY, nested=nested_style)
+        self.assertIsInstance(style.get_style('nested'), FrontendStyle)
+
+    def test_init_with_invalid_nested_styles(self):
+        with self.assertRaises(ValueError):
+            FrontendStyle(FrontendStyle.PRIMARY, nested="invalid-style")
+
+    def test_get_style(self):
+        style = FrontendStyle(FrontendStyle.SECONDARY)
+        self.assertEqual(style.get_style('root'), FrontendStyle.SECONDARY)
+
+    def test_get_style_non_existing_element(self):
+        style = FrontendStyle(FrontendStyle.SECONDARY)
+        self.assertIsNone(style.get_style('non-existing'))
+
+    def test_apply_valid_style(self):
+        style = FrontendStyle(FrontendStyle.EMPTY)
+        style.apply_style('root', FrontendStyle.INFO)
+        self.assertEqual(style.get_style('root'), FrontendStyle.INFO)
+
+    def test_apply_invalid_style(self):
+        style = FrontendStyle(FrontendStyle.EMPTY)
+        with self.assertRaises(ValueError):
+            style.apply_style('root', "invalid-style")
+
+    def test_to_dict(self):
+        nested_style = FrontendStyle(FrontendStyle.SUCCESS)
+        style = FrontendStyle(FrontendStyle.NEUTRAL, nested=nested_style)
+        expected_dict = {'root': FrontendStyle.NEUTRAL, 'nested': {'root': FrontendStyle.SUCCESS}}
+        self.assertEqual(style.to_dict(), expected_dict)
+
+    def test_to_dict_with_deep_nesting(self):
+        nested_style_level_2 = FrontendStyle(FrontendStyle.WARNING)
+        nested_style_level_1 = FrontendStyle(FrontendStyle.INFO, nested_lvl2=nested_style_level_2)
+        style = FrontendStyle(FrontendStyle.NEUTRAL, nested_lvl1=nested_style_level_1)
+        expected_dict = {
+            'root': FrontendStyle.NEUTRAL,
+            'nested_lvl1': {
+                'root': FrontendStyle.INFO,
+                'nested_lvl2': {
+                    'root': FrontendStyle.WARNING
+                }
+            }
+        }
+        self.assertEqual(style.to_dict(), expected_dict)
+
+if __name__ == '__main__':
+    unittest.main()