def METHOD_NAME(s, wrap):
    """
    Test that latex_to_png_dvipng just runs without error.
    """
    def mock_kpsewhich(filename):
        assert filename == "breqn.sty"
        return None
    latextools.latex_to_png_dvipng(s, wrap)
    with patch_latextool(mock_kpsewhich):
        latextools.latex_to_png_dvipng(s, wrap)