from jedi import settings
from jedi.cache import ParserCacheItem, _ModulePickling


ModulePickling = _ModulePickling()


def test_modulepickling_change_cache_dir(monkeypatch, tmpdir):
    """
    ModulePickling should not save old cache when cache_directory is changed.

    See: `#168 <https://github.com/davidhalter/jedi/pull/168>`_
    """
    dir_1 = str(tmpdir.mkdir('first'))
    dir_2 = str(tmpdir.mkdir('second'))

    item_1 = ParserCacheItem('fake parser 1')
    item_2 = ParserCacheItem('fake parser 2')
    path_1 = 'fake path 1'
    path_2 = 'fake path 2'

    monkeypatch.setattr(settings, 'cache_directory', dir_1)
    ModulePickling.save_module(path_1, item_1)
    cached = ModulePickling.load_module(path_1, item_1.change_time - 1)
    assert cached == item_1.parser

    monkeypatch.setattr(settings, 'cache_directory', dir_2)
    ModulePickling.save_module(path_2, item_2)
    cached = ModulePickling.load_module(path_1, item_1.change_time - 1)
    assert cached is None