Harrison/serper api bug (#4902)

Co-authored-by: Jerry Luan <xmaswillyou@gmail.com>

tests/integration_tests/utilities/test_googleserper_api.py

@@ -4,13 +4,20 @@ import pytest
 from langchain.utilities.google_serper import GoogleSerperAPIWrapper
 
 
-def test_call() -> None:
-    """Test that call gives the correct answer."""
+def test_search_call() -> None:
+    """Test that call gives the correct answer from search."""
     search = GoogleSerperAPIWrapper()
     output = search.run("What was Obama's first name?")
     assert "Barack Hussein Obama II" in output
 
 
+def test_news_call() -> None:
+    """Test that call gives the correct answer from news search."""
+    search = GoogleSerperAPIWrapper(type="news")
+    output = search.run("What's new with stock market?").lower()
+    assert "stock" in output or "market" in output
+
+
 async def test_results() -> None:
     """Test that call gives the correct answer."""
     search = GoogleSerperAPIWrapper()