import pytest
from aider.run_cmd import run_cmd

def test_run_cmd_echo():
    command = 'echo Hello, World!'
    exit_code, output = run_cmd(command)
    
    assert exit_code == 0
    assert output.strip() == 'Hello, World!'

def test_run_cmd_echo_with_quotes():
    command = 'echo "Hello, World!"'
    exit_code, output = run_cmd(command)
    
    assert exit_code == 0
    assert output.strip() == 'Hello, World!'

def test_run_cmd_invalid_command():
    command = 'invalid_command_that_does_not_exist'
    exit_code, output = run_cmd(command)
    
    assert exit_code != 0
    assert 'command not found' in output.lower() or 'is not recognized' in output.lower()