def test_reading_exact_wrapping_singles(self):
b = RingBuffer(4)
b.write(b"ab")
self.assertEqual(b.read(), b"ab")
b.write(b"defg")
self.assertEqual(b.read_exactly(1), b"d")
self.assertEqual(b.read_exactly(1), b"e")
self.assertEqual(b.read_exactly(1), b"f")
def test_reading_exact_wrapping_full(self):
b = RingBuffer(4)
b.write(b"ab")
self.assertEqual(b.read(), b"ab")
b.write(b"defg")
self.assertEqual(b.read_exactly(4), b"defg")
def test_reading_exact_nothing(self):
b = RingBuffer(4)
b.write(b"abc")
self.assertEqual(b.read_exactly(0), b"")
def test_reading_exact_basic_full(self):
b = RingBuffer(4)
b.write(b"abcd")
self.assertEqual(b.read_exactly(4), b"abcd")
def test_reading_exact_basic(self):
b = RingBuffer(4)
b.write(b"abc")
self.assertEqual(b.read_exactly(2), b"ab")
def test_reading_exact_negative(self):
b = RingBuffer(4)
b.write(b"abc")
with self.assertRaises(ValueError):
b.read_exactly(-1)
