def test_decode_package_synchronization_bits(self):
# all bytes ok
packets = [0x00, 0x80] + [0x80] * 7
CMS50Dplus.decode_package(packets)
# first byte wrong
packets = [0x80, 0x80] + [0x80] * 7
self.assertRaises(ValueError, CMS50Dplus.decode_package, [1] * 9)
# other bytes wrong
for position in range(1, 9):
packets = [0x00, 0x80] + [0x80] * 7
packets[position] = 0
self.assertRaises(ValueError, CMS50Dplus.decode_package, packets)
def test_decode_package_packet_length(self):
packets = [0x00, 0x80] + [0x80] * 11
# length too short
for length in range(0, 3):
self.assertRaisesRegex(ValueError, 'too short',
CMS50Dplus.decode_package, packets[:length])
# length ok
for length in range(3, 10):
CMS50Dplus.decode_package(packets[:length])
# length too long
for length in range(10, 13):
self.assertRaisesRegex(ValueError, 'too long',
CMS50Dplus.decode_package, packets[:length])
def test_encode_package_decode_package(self):
package_type = 0x00
for run in range(0, 10):
original_package = test_package()
packets = CMS50Dplus.encode_package(package_type, original_package)
_, decoded_package = CMS50Dplus.decode_package(packets)
self.assertEqual(decoded_package, original_package)
def test_decode_package_high_byte(self):
# high: 0b11111111, packets: 0b10000000 => package: 0b10000000
packets = [0, 0xff] + [0x80] * 7
package_type, package = CMS50Dplus.decode_package(packets)
for byte in package:
self.assertEqual(byte, 0x80)
# high: 0b11111111, packets: 0b11111111 => package: 0b11111111
packets = [0, 0xff] + [0xff] * 7
package_type, package = CMS50Dplus.decode_package(packets)
for byte in package:
self.assertEqual(byte, 0xff)
# high: 0b10000000, packets: 0b10000000 => package: 0b00000000
packets = [0, 0x80] + [0x80] * 7
package_type, package = CMS50Dplus.decode_package(packets)
for byte in package:
self.assertEqual(byte, 0x00)
# high: 0b10000000, packets: 0b11111111 => package: 0b01111111
packets = [0, 0x80] + [0xff] * 7
package_type, package = CMS50Dplus.decode_package(packets)
for byte in package:
self.assertEqual(byte, 0x7f)
def test_decode_package_package_types(self):
for byte in range(0x00, 0x80):
packets = [byte, 0x80] + [0x80] * 7
package_type, package = CMS50Dplus.decode_package(packets)
self.assertEqual(byte, package_type)