conftest.py 文件源码

def _setup():
    # The baseline images are created in this locale, so we should use
    # it during all of the tests.
    try:
        locale.setlocale(locale.LC_ALL, str('en_US.UTF-8'))
    except locale.Error:
        try:
            locale.setlocale(locale.LC_ALL, str('English_United States.1252'))
        except locale.Error:
            warnings.warn(
                "Could not set locale to English/United States. "
                "Some date-related tests may fail")

    plt.switch_backend('Agg')  # use Agg backend for these test
    if mpl.get_backend().lower() != "agg":
        msg = ("Using a wrong matplotlib backend ({0}), "
               "which will not produce proper images")
        raise Exception(msg.format(mpl.get_backend()))

    # These settings *must* be hardcoded for running the comparison
    # tests
    mpl.rcdefaults()  # Start with all defaults
    mpl.rcParams['text.hinting'] = True
    mpl.rcParams['text.antialiased'] = True
    mpl.rcParams['text.hinting_factor'] = 8

    # make sure we don't carry over bad plots from former tests
    msg = ("no of open figs: {} -> find the last test with ' "
           "python tests.py -v' and add a '@cleanup' decorator.")
    assert len(plt.get_fignums()) == 0, msg.format(plt.get_fignums())