def test_compute_size_does_not_mirror(self):
"""Verify the eeproms internal _compute_size method returns the correct
bool value when it detects no mirroring.
"""
eeprom = FtdiEeprom()
eeprom.open(self.url, ignore=True)
_, mirrored = eeprom._compute_size([])
self.assertFalse(mirrored)
eeprom.close()
eeprom = FtdiEeprom()
eeprom.open(self.url, ignore=False)
_, mirrored = eeprom._compute_size([])
self.assertFalse(mirrored)
eeprom.close()
def test_compute_size_detects_mirror(self):
"""Verify the eeproms internal _compute_size method
returns the correct bool value when it detects an eeprom mirror
"""
eeprom = FtdiEeprom()
eeprom.open(self.url, ignore=True)
_, mirrored = eeprom._compute_size([])
self.assertFalse(mirrored)
test_buf = bytearray(eeprom.size)
sector_mid = eeprom.size // 2
for ii in range(sector_mid):
test_buf[ii] = ii % 255
test_buf[sector_mid+ii] = test_buf[ii]
_, mirrored = eeprom._compute_size(bytes(test_buf))
self.assertTrue(mirrored)
# change one byte and confirm failure
test_buf[eeprom.size - 2] = test_buf[eeprom.size - 2] - 1
_, mirrored = eeprom._compute_size(bytes(test_buf))
self.assertFalse(mirrored)
