refactor: Update WikidataAPI component to standard output pattern (#5431)

* refactor: Update WikidataAPI component to standard output pattern

* [autofix.ci] apply automated fixes

* Fix formatting errors in wikidata_api.py

* fix: Fix linting error in tools init

* test: add unit tests for WikidataComponent

* refactor: rename WikidataComponent to WikidataAPIComponent

---------

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Eric Hare <ericrhare@gmail.com>

src/backend/tests/unit/components/tools/test_wikidata_api.py

@@ -0,0 +1,106 @@
+from unittest.mock import MagicMock, patch
+
+import httpx
+import pytest
+from langchain_core.tools import ToolException
+from langflow.components.tools import WikidataAPIComponent
+from langflow.custom import Component
+from langflow.custom.utils import build_custom_component_template
+from langflow.schema import Data
+from langflow.schema.message import Message
+
+
+def test_wikidata_initialization():
+    component = WikidataAPIComponent()
+    assert component.display_name == "Wikidata API"
+    assert component.description == "Performs a search using the Wikidata API."
+    assert component.icon == "Wikipedia"
+
+
+def test_wikidata_template():
+    wikidata = WikidataAPIComponent()
+    component = Component(_code=wikidata._code)
+    frontend_node, _ = build_custom_component_template(component)
+
+    # Verify basic structure
+    assert isinstance(frontend_node, dict)
+
+    # Verify inputs
+    assert "template" in frontend_node
+    input_names = [input_["name"] for input_ in frontend_node["template"].values() if isinstance(input_, dict)]
+    assert "query" in input_names
+
+
+@patch("langflow.components.tools.wikidata_api.httpx.get")
+def test_fetch_content_success(mock_httpx):
+    component = WikidataAPIComponent()
+    component.query = "test query"
+
+    # Mock successful API response
+    mock_response = MagicMock()
+    mock_response.json.return_value = {
+        "search": [
+            {
+                "label": "Test Label",
+                "id": "Q123",
+                "url": "https://test.com",
+                "description": "Test Description",
+                "concepturi": "https://test.com/concept",
+            }
+        ]
+    }
+    mock_httpx.return_value = mock_response
+
+    result = component.fetch_content()
+
+    assert isinstance(result, list)
+    assert len(result) == 1
+    assert result[0].text == "Test Label: Test Description"
+    assert result[0].data["label"] == "Test Label"
+    assert result[0].data["id"] == "Q123"
+
+
+@patch("langflow.components.tools.wikidata_api.httpx.get")
+def test_fetch_content_empty_response(mock_httpx):
+    component = WikidataAPIComponent()
+    component.query = "test query"
+
+    # Mock empty API response
+    mock_response = MagicMock()
+    mock_response.json.return_value = {"search": []}
+    mock_httpx.return_value = mock_response
+
+    result = component.fetch_content()
+
+    assert isinstance(result, list)
+    assert len(result) == 1
+    assert "error" in result[0].data
+    assert "No search results found" in result[0].data["error"]
+
+
+@patch("langflow.components.tools.wikidata_api.httpx.get")
+def test_fetch_content_error_handling(mock_httpx):
+    component = WikidataAPIComponent()
+    component.query = "test query"
+
+    # Mock HTTP error
+    mock_httpx.side_effect = httpx.HTTPError("API Error")
+
+    with pytest.raises(ToolException):
+        component.fetch_content()
+
+
+def test_fetch_content_text():
+    component = WikidataAPIComponent()
+    component.fetch_content = MagicMock(
+        return_value=[
+            Data(text="First result", data={"label": "Label 1"}),
+            Data(text="Second result", data={"label": "Label 2"}),
+        ]
+    )
+
+    result = component.fetch_content_text()
+
+    assert isinstance(result, Message)
+    assert "First result" in result.text
+    assert "Second result" in result.text