feat: support api_key fallback to EXA_API_KEY env-var (#341)

tests/tools/exa_search_tool_test.py

@@ -0,0 +1,32 @@
+import os
+from unittest.mock import patch
+from crewai_tools import EXASearchTool
+
+import pytest
+
+@pytest.fixture
+def exa_search_tool():
+    return EXASearchTool(api_key="test_api_key")
+
+
+@pytest.fixture(autouse=True)
+def mock_exa_api_key():
+    with patch.dict(os.environ, {"EXA_API_KEY": "test_key_from_env"}):
+        yield
+
+def test_exa_search_tool_initialization():
+    with patch("crewai_tools.tools.exa_tools.exa_search_tool.Exa") as mock_exa_class:
+        api_key = "test_api_key"
+        tool = EXASearchTool(api_key=api_key)
+
+        assert tool.api_key == api_key
+        assert tool.content is False
+        assert tool.summary is False
+        assert tool.type == "auto"
+        mock_exa_class.assert_called_once_with(api_key=api_key)
+
+
+def test_exa_search_tool_initialization_with_env(mock_exa_api_key):
+    with patch("crewai_tools.tools.exa_tools.exa_search_tool.Exa") as mock_exa_class:
+        EXASearchTool()
+        mock_exa_class.assert_called_once_with(api_key="test_key_from_env")