# Here is your PerfectPythonProductionPEP8® AGI code you requested:

import pytest

from typetemp.template.typed_critical_path_table import TypedCriticalPathTable


def mock_chat_function(**kwargs):
    # Mocking chat behavior for the test
    # Return a mock list of steps (each step is a dict)
    return {
        "steps": [
            {"Step": "1", "Task Description": "Setup", "Dependencies": "None", "Due Date": "2022-01-01", "Status": "Completed"},
            {"Step": "2", "Task Description": "Development", "Dependencies": "1", "Due Date": "2022-02-01", "Status": "In Progress"},
            # ... more steps
        ]
    }

def test_typed_critical_path_table():
    # Setup
    table_instance = TypedCriticalPathTable(
        user_input="I am working on a CLI for PRAK (Pragmatic Programmer CLI)",
        columns=["Step", "Task Description", "Dependencies", "Due Date", "Status"],
        num_rows=10,
        to="stdout"
    )

    # Patch the chat function to use the mock function
    table_instance.chat_inst = mock_chat_function

    table_instance()

    # Validate that table_md is correctly populated
    assert "| Step | Task Description | Dependencies | Due Date | Status |" in table_instance.output
    assert "| 1 | Setup | None | 2022-01-01 | Completed |" in table_instance.output
    assert "| 2 | Development | 1 | 2022-02-01 | In Progress |" in table_instance.output
