human
Solve the following python programming problem given the following code:
@remote_data
def test_data_noastropy_fallback(monkeypatch):
assistant
#Here is the Python code you requested.

    """Tests to make sure the default behavior when the cache directory can\t
    be located is correct
    """
    from .. import data
    from ...config import paths
    lockdir = os.path.join(_get_download_cache_locs()[0], u'lock')
    data.conf.delete_temporary_downloads_at_exit = True
    monkeypatch.setenv(str(u'XDG_CONFIG_HOME'), u'foo')
    monkeypatch.delenv(str(u'XDG_CONFIG_HOME'))
    monkeypatch.setenv(str(u'XDG_CACHE_HOME'), u'bar')
    monkeypatch.delenv(str(u'XDG_CACHE_HOME'))
    monkeypatch.setattr(paths.set_temp_config, u'_temp_path', None)
    monkeypatch.setattr(paths.set_temp_cache, u'_temp_path', None)
    def osraiser(dirnm, linkto):
        raise OSError
    monkeypatch.setattr(paths, u'_find_or_create_astropy_dir', osraiser)
    with pytest.raises(OSError):
        paths.get_cache_dir()
    with catch_warnings(CacheMissingWarning) as w:
        fnout = data.download_file(TESTURL, cache=True)
    assert os.path.isfile(fnout)
    assert (len(w) > 1)
    w1 = w.pop(0)
    w2 = w.pop(0)
    assert (w1.category == CacheMissingWarning)
    assert (u'Remote    data    cache    could    not    be    accessed' in w1.message.args[0])
    assert (w2.category == CacheMissingWarning)
    assert (u'File    downloaded    to    temporary    location' in w2.message.args[0])
    assert (fnout == w2.message.args[1])
    with catch_warnings(CacheMissingWarning) as w:
        data.clear_download_cache(TESTURL)
    assert os.path.isfile(fnout)
    data._deltemps()
    assert (not os.path.isfile(fnout))
    assert (len(w) > 0)
    w3 = w.pop()
    assert (w3.category == data.CacheMissingWarning)
    assert (u'Not    clearing    data    cache    -    cache    inacessable' in str(w3.message))
    with catch_warnings(CacheMissingWarning) as w:
        fnnocache = data.download_file(TESTURL, cache=False)
    with open(fnnocache, u'rb') as page:
        assert (page.read().decode(u'utf-8').find(u'Astropy') > (-1))
    assert (len(w) == 0)
    assert (not os.path.isdir(lockdir)), u'Cache    dir    lock    was    not    released!'