fix: handle LangGraph interrupts in human tool

Co-Authored-By: Joe Moura <joao@crewai.com>

tests/tools/test_human_tool.py

@@ -0,0 +1,42 @@
+"""Test HumanTool functionality."""
+
+import pytest
+from unittest.mock import patch
+
+from crewai.tools import HumanTool
+
+def test_human_tool_basic():
+    """Test basic HumanTool creation and attributes."""
+    tool = HumanTool()
+    assert tool.name == "human"
+    assert "ask user to enter input" in tool.description.lower()
+    assert not tool.result_as_answer
+
+@pytest.mark.vcr(filter_headers=["authorization"])
+def test_human_tool_with_langgraph_interrupt():
+    """Test HumanTool with LangGraph interrupt handling."""
+    tool = HumanTool()
+    
+    # Test successful interrupt handling
+    with patch('langgraph.prebuilt.state_graphs.interrupt') as mock_interrupt:
+        mock_interrupt.return_value = {"data": "test response"}
+        result = tool._run("test query")
+        assert result == "test response"
+        mock_interrupt.assert_called_with({"query": "test query"})
+
+    # Test interrupt propagation
+    with patch('langgraph.prebuilt.state_graphs.interrupt') as mock_interrupt:
+        mock_interrupt.side_effect = Exception("Interrupt")
+        with pytest.raises(Exception) as exc_info:
+            tool._run("test query")
+        assert "Interrupt" in str(exc_info.value)
+
+def test_human_tool_without_langgraph():
+    """Test HumanTool behavior when LangGraph is not installed."""
+    tool = HumanTool()
+    
+    with patch.dict('sys.modules', {'langgraph': None}):
+        with pytest.raises(ImportError) as exc_info:
+            tool._run("test query")
+        assert "LangGraph is required" in str(exc_info.value)
+        assert "pip install langgraph" in str(exc_info.value)