chore: import upstream snapshot with attribution

servers/fastapi/tests/unit/test_template_handler.py

@@ -0,0 +1,50 @@
+from templates.handler import _normalize_layout_code_for_create
+
+
+def test_normalize_layout_code_repairs_bare_asset_fields():
+    code = """
+const data = {
+  icon: {
+    __icon_url__
+    __icon_query__: "play"
+  },
+};
+"""
+
+    normalized = _normalize_layout_code_for_create(code)
+
+    assert '__icon_url__: "/static/icons/placeholder.svg",' in normalized
+    assert '__icon_query__: "play"' in normalized
+
+
+def test_normalize_layout_code_rewrites_raw_asset_field_names():
+    code = """
+const data = {
+  icon: {
+    icon_url: "/static/icons/placeholder.svg",
+    icon_query: "play",
+  },
+};
+"""
+
+    normalized = _normalize_layout_code_for_create(code)
+
+    assert '__icon_url__: "/static/icons/placeholder.svg"' in normalized
+    assert '__icon_query__: "play"' in normalized
+
+
+def test_normalize_layout_code_does_not_renormalize_asset_fields():
+    code = """
+const data = {
+  icon: {
+    __icon_url__: "/static/icons/placeholder.svg",
+    __icon_query__: "play",
+  },
+};
+"""
+
+    normalized = _normalize_layout_code_for_create(code)
+
+    assert "____icon_url____" not in normalized
+    assert "____icon_query____" not in normalized
+    assert '__icon_url__: "/static/icons/placeholder.svg"' in normalized