test: add more unit tests of tools (#315)

* test: add more test on test_tts.py

* test: add unit test of search and retriever in tools

* test: remove the main code of search.py

* test: add the travily_search unit test

* reformate the codes

* test: add unit tests of tools

* Added the pytest-asyncio dependency

* added the license header of test_tavily_search_api_wrapper.py

pyproject.toml

@@ -42,6 +42,7 @@ dev = [
 test = [
     "pytest>=7.4.0",
     "pytest-cov>=4.1.0",
+    "pytest-asyncio>=1.0.0",
 ]
 
 [tool.pytest.ini_options]