'Check that ZIP internal structure sizes are calculated correctly.'

def test_struct_sizes(self):

    self.assertEqual(zipfile.sizeEndCentDir, 22)
    self.assertEqual(zipfile.sizeCentralDir, 46)
    self.assertEqual(zipfile.sizeEndCentDir64, 56)
    self.assertEqual(zipfile.sizeEndCentDir64Locator, 20)
