def testCalculateChecksum(self):
edid = Edid(data=bytearray(128))
# put wrong checksum
edid[127] = 42
edid.calculateChecksum()
self.assertTrue(edid.checkChecksum())
self.assertEqual(edid[127], 0x00)
def testCalculateChecksum2(self):
edid = Edid(data=bytearray(128))
# change data
edid[0] = 1
edid.calculateChecksum()
self.assertTrue(edid.checkChecksum())
self.assertEqual(edid[127], 255)
def testCalculateChecksum3(self):
edid = Edid(data=bytearray(128))
for i in range(0, 127):
edid[i] = 2
# Databytes: 127 * 2 = 254
# Checksum: 2
# Sum: 256 % 256 = 0
edid.calculateChecksum()
self.assertTrue(edid.checkChecksum())
self.assertEqual(edid[127], 2)
def testCheckChecksumInvalid(self):
edid = Edid(data=self.VALID_EDID_DATA[0])
edid[127] = 0
self.assertFalse(edid.checkChecksum())
def testCheckChecksumValid(self):
for data in self.VALID_EDID_DATA:
edid = Edid(data=data)
self.assertTrue(edid.checkChecksum())
def testCheckChecksumInvalid(self):
edid = Edid(data=self.VALID_EDID_DATA[0])
edid[127] = 0
self.assertFalse(edid.checkChecksum())
def testCheckChecksumValid(self):
for data in self.VALID_EDID_DATA:
edid = Edid(data=data)
self.assertTrue(edid.checkChecksum())
