(Community): Added API Key for Jina Search API Wrapper (#29622)

- **Description:** Simple change for adding the API Key for Jina Search
API Wrapper
- **Issue:** #29596

libs/community/tests/unit_tests/tools/jina_search/test_jina_search.py

@@ -0,0 +1,27 @@
+import os
+import unittest
+from typing import Any
+from unittest.mock import patch
+
+from langchain_community.tools.jina_search.tool import JinaSearch
+from langchain_community.utilities.jina_search import JinaSearchAPIWrapper
+
+os.environ["JINA_API_KEY"] = "test_key"
+
+
+class TestJinaSearchTool(unittest.TestCase):
+    @patch(
+        "langchain_community.tools.jina_search.tool.JinaSearch.invoke",
+        return_value="mocked_result",
+    )
+    def test_invoke(self, mock_run: Any) -> None:
+        query = "Test query text"
+        wrapper = JinaSearchAPIWrapper(api_key="test_key")  # type: ignore[arg-type]
+        jina_search_tool = JinaSearch(api_wrapper=wrapper)  # type: ignore[call-arg]
+        results = jina_search_tool.invoke(query)
+        expected_result = "mocked_result"
+        assert results == expected_result
+
+
+if __name__ == "__main__":
+    unittest.main()