def test3hex_machine_too_long_value(self):
"""Test the hex_machine with too long hex values. All values longer than 4 digits are stripped."""
def check_value(data): # skipcq: PY-D0003
self.assertEqual(data, i)
# only 00FF is read.
i = 255
string = b'0x00FFFF'[2:] # remove 0x
state = hex_machine(check_value)
j = 0
for j, c in enumerate(string):
state = state(c)
if state is None:
break
self.assertEqual(j, 3)
self.assertIsNone(state)
# only 0F12 is read.
i = 3858
string = b'0x0F1234'[2:] # remove 0x
state = hex_machine(check_value)
j = 0
for j, c in enumerate(string):
state = state(c)
if state is None:
break
self.assertEqual(j, 3)
self.assertIsNone(state)
def test1hex_machine_valid_values(self):
"""Test the hex_machine with all valid four digit values from 0x0000 to 0xFFFF."""
def check_value(data): # skipcq: PY-D0003
self.assertEqual(data, i)
for i in range(65536):
string = str(format(i, '#06x')).encode()[2:] # remove 0x
state = hex_machine(check_value)
for c in string:
state = state(c)
self.assertIsNone(state)
for i in range(65536):
string = str(format(i, '#06x')).upper().encode()[2:] # remove 0x
state = hex_machine(check_value)
for c in string:
state = state(c)
self.assertIsNone(state)
def test2hex_machine_too_short_value(self):
"""Test the hex_machine with too short hex values."""
def check_value(data): # skipcq: PY-D0003
self.assertEqual(data, i)
for i in range(4096):
# converts the integer to the shortest possible hex string.
string = str(hex(i)).encode()[2:] # remove 0x
state = hex_machine(check_value)
for c in string:
state = state(c)
i = 4096
string = str(hex(i)).encode()[2:] # remove 0x
state = hex_machine(check_value)
for c in string:
state = state(c)
self.assertIsNone(state)
def test4hex_machine_boundary_values(self):
"""Test boundary values before and after 0-9, a-f, A-F."""
def check_value(data): # skipcq: PY-D0003
self.assertEqual(data, i)
allowed_value_list = '0123456789abcdefABCDEF'
forbidden_value_list = [int(hex(j), 16) for j in range(48)] + [
int(hex(j), 16) for j in range(58, 65)
] + [int(hex(j), 16) for j in range(71, 97)
] + [int(hex(j), 16) for j in range(103, 128)]
for a in allowed_value_list:
state = hex_machine(check_value)
string = '0x' + a + a + a + a
i = int(string, 16) # convert hex string to integer
for _ in range(4):
state = state(ord(a))
self.assertEqual(state, None)
for f in forbidden_value_list:
state = hex_machine(check_value)
self.assertIsNone(
state(f),
"value: %d, char: '%s' should not be allowed in the hex_machine!"
% (f, chr(f)))