Added test for is_allow_empty

flask_utils/decorators.py

@@ -86,7 +86,6 @@ def _is_allow_empty(value: Any, type_hint: Type) -> bool:  # type: ignore
     .. versionadded:: 0.2.0
     """
     if not value:
-        # TODO: Find a test for this
         # Check if type is explicitly Optional or allow_empty is True
         if _is_optional(type_hint):
             return True

tests/test_validate_params.py

@@ -7,6 +7,7 @@
 
 import pytest
 from flask import Flask
+from flask import jsonify
 
 from flask_utils import validate_params
 
@@ -579,3 +580,22 @@ def test_valid_request(self, client):
         response = client.post("/users/123", json={"user_id": 456})
         assert response.status_code == 200
         assert response.text == "456"
+
+
+class TestEmptyValues:
+    @pytest.fixture(autouse=True)
+    def setup_routes(self, flask_client):
+        @flask_client.route("/empty", methods=["POST"])
+        @validate_params()
+        def empty_route(name: Optional[str]):
+            return jsonify({"name": name})
+
+    def test_empty_value_optional(self, client):
+        response = client.post("/empty", json={})
+        assert response.status_code == 200
+        assert response.get_json() == {"name": None}
+
+        # Testing with 'name' as empty string
+        response = client.post("/empty", json={"name": ""})
+        assert response.status_code == 200
+        assert response.get_json() == {"name": ""}