add test tool chain

tests/test_tools/test_tool_chain.py

@@ -0,0 +1,23 @@
+import pytest
+
+from motleycrew.tools import MotleyTool
+
+
+class ToolMock:
+    def invoke(self, input_dict: dict, *args, **kwargs):
+        return input_dict
+
+
+@pytest.fixture
+def tools():
+    tool1 = MotleyTool(ToolMock())
+    tool2 = MotleyTool(ToolMock())
+    return [tool1, tool2]
+
+
+def test_tool_chain(tools):
+    tool1, tool2 = tools
+    tool_chain = tool1 | tool2
+    assert hasattr(tool_chain, "invoke")
+    prompt = {"prompt": "test prompt"}
+    assert tool_chain.invoke(prompt) == prompt