import subprocess


def run_subprocess(command, working_dir='.', expected_returncode=0):
    """
    Helper function to run a shell command and report success/failure
    depending on the exit status of the shell command.
    """
    # Note we need to capture stdout/stderr from the subprocess,
    # then print it, which nose/unittest will then capture and
    # buffer appropriately
    result = subprocess.run(
        command,
        stdout=subprocess.PIPE,
        stderr=subprocess.STDOUT,
        cwd=working_dir
    )
    print(working_dir + " > " + " ".join(command))
    print(result.stdout.decode('utf-8'))
    assert(result.returncode == expected_returncode)
    return result.stdout.decode('utf-8')