Function test_precmd_hook_emptystatement_second

tests/test_plugin.py:652–686

(capsys)

def test_precmd_hook_emptystatement_second(capsys) -> None:
    app = PluggedApp()
    app.register_precmd_hook(app.precmd_hook)
    stop = app.onecmd_plus_hooks("say hello")
    out, err = capsys.readouterr()
    assert not stop
    assert out == "hello\n"
    assert not err
    # with one hook registered, we should get precmd() and the hook
    assert app.called_precmd == 2

    # register another function and make sure it gets called
    app.reset_counters()
    app.register_precmd_hook(app.precmd_hook_emptystatement)
    stop = app.onecmd_plus_hooks("say hello")
    out, err = capsys.readouterr()
    assert not stop
    assert not out
    assert not err
    # since the registered hooks are called before precmd(), if a registered
    # hook throws an exception, precmd() is never called
    assert app.called_precmd == 2

    # register a third function which shouldn't be called
    app.reset_counters()
    app.register_precmd_hook(app.precmd_hook)
    stop = app.onecmd_plus_hooks("say hello")
    out, err = capsys.readouterr()
    assert not stop
    assert not out
    assert not err
    # the exception raised by the second hook should prevent the third
    # hook from being called. since the registered hooks are called before precmd(),
    # if a registered hook throws an exception, precmd() is never called
    assert app.called_precmd == 2


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