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test_truncation_by_bytes() — langchain Function Reference

Architecture documentation for the test_truncation_by_bytes() function in test_shell_tool.py from the langchain codebase.

Function python LangChainCore MessageInterface calls 1

Entity Profile

Dependency Diagram

graph TD
  019aa08f_0fbc_aacb_8e14_2d6e3a44d7d5["test_truncation_by_bytes()"]
  f21fd460_1d0c_cb92_cfa1_eae0890e2f58["test_shell_tool.py"]
  019aa08f_0fbc_aacb_8e14_2d6e3a44d7d5 -->|defined in| f21fd460_1d0c_cb92_cfa1_eae0890e2f58
  1bc202d6_8b54_02e9_fadd_ff3171c38a75["_empty_state()"]
  019aa08f_0fbc_aacb_8e14_2d6e3a44d7d5 -->|calls| 1bc202d6_8b54_02e9_fadd_ff3171c38a75
  style 019aa08f_0fbc_aacb_8e14_2d6e3a44d7d5 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_shell_tool.py lines 304–322

def test_truncation_by_bytes(tmp_path: Path) -> None:
    """Test that output is truncated by bytes when max_output_bytes is exceeded."""
    policy = HostExecutionPolicy(max_output_bytes=50, command_timeout=5.0)
    middleware = ShellToolMiddleware(workspace_root=tmp_path / "workspace", execution_policy=policy)
    runtime = Runtime()
    state = _empty_state()
    try:
        updates = middleware.before_agent(state, runtime)
        if updates:
            state.update(cast("ShellToolState", updates))
        resources = middleware._get_or_create_resources(state)

        result = middleware._run_shell_tool(
            resources, {"command": "python3 -c 'print(\"x\" * 100)'"}, tool_call_id=None
        )

        assert "truncated at 50 bytes" in result.lower()
    finally:
        middleware.after_agent(state, runtime)

Domain

Subdomains

Defined In

Calls

Source

Frequently Asked Questions

What does test_truncation_by_bytes() do?
test_truncation_by_bytes() is a function in the langchain codebase, defined in libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_shell_tool.py.
Where is test_truncation_by_bytes() defined?
test_truncation_by_bytes() is defined in libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_shell_tool.py at line 304.
What does test_truncation_by_bytes() call?
test_truncation_by_bytes() calls 1 function(s): _empty_state.

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