Function mock_find_cmd

IPython/lib/tests/test_latextools.py:23–25

(arg)

def check_latex_to_png_dvipng_fails_when_no_cmd(command):
    def mock_find_cmd(arg):
        if arg == command:
            raise FindCmdError

    with patch.object(latextools, "find_cmd", mock_find_cmd):
        nt.assert_equal(latextools.latex_to_png_dvipng("whatever", True),