def test_size_zero_buffer(self): b = RingBuffer(0) self.assertEqual(b.bytes_total(), 0) self.assertEqual(b.bytes_free(), 0) self.assertEqual(b.bytes_used(), 0) with self.assertRaises(ValueError): b.write(b"a")
def test_size_one_buffer(self): b = RingBuffer(1) self.assertEqual(b.bytes_total(), 1) self.assertEqual(b.bytes_free(), 1) self.assertEqual(b.bytes_used(), 0) b.write(b"a") self.assertEqual(b.bytes_total(), 1) self.assertEqual(b.bytes_free(), 0) self.assertEqual(b.bytes_used(), 1) self.assertEqual(b.read(), b"a") self.assertEqual(b.bytes_total(), 1) self.assertEqual(b.bytes_free(), 1) self.assertEqual(b.bytes_used(), 0) self.assertEqual(b.read(), None) b.write(b"b") self.assertEqual(b.read(), b"b") self.assertEqual(b.read(), None)