def test_file_modified_time(tmpdir):
"""
File storage returns a Datetime object for the last modified time of
a file.
"""
storage = FileSystemStorage(location=str(tmpdir))
assert not storage.exists("test.file")
f = io.StringIO("custom contents")
f_name = storage.save("test.file", f)
mtime = storage.modified_time(f_name)
assert mtime == datetime.datetime.fromtimestamp(os.path.getmtime(storage.path(f_name)))
assert datetime.datetime.now() - storage.modified_time(f_name) < datetime.timedelta(seconds=2)
