def test_basic_pack(self):
u = Fields()
u.add(CH(4, 'string'))
u.string = '1234'
data = u.pack()
assert data == bytearray.fromhex("31 32 33 34")
def test_chars_padding_added(self):
u = Fields()
u.add(CH(6, 'string'))
u.string = '1234'
data = u.pack()
assert data == bytearray.fromhex('31 32 33 34 00 00')
def unpack(self):
# Dynamically build fields based on message length
self.f = Fields()
self.f.add(U1('msgVer'))
self.f.add(U1('numTrkChHw'))
self.f.add(U1('numTrkChUse'))
self.f.add(U1('numConfigBlocks'))
# Extract upto this place to read number of config blocks
super().unpack()
# TODO: Check extra length against numConfigBlocks
# TODO: raise on mismatch
"""
extra_length = len(self.data) - 40
extra_info = int(extra_length / 30)
"""
# TODO: check nested fields -> unit test
for i in range(self.f.numConfigBlocks):
self.f.add(U1(f'gnssId_{i}'))
self.f.add(U1(f'resTrkCh_{i}'))
self.f.add(U1(f'maxTrkCh_{i}'))
self.f.add(Padding(1, f'res1_{i}'))
self.f.add(X4(f'flags_{i}')) # Bit 0: enable
super().unpack()
def test_chars_too_long(self):
u = Fields()
u.add(CH(6, 'string'))
u.string = '1234567' # One byte too long
with pytest.raises(ValueError):
u.pack()
def test_no_duplicate_fields(self):
u = Fields()
u.add(I4('test1'))
# Must fail as name 'test1' is already used
with pytest.raises(KeyError):
u.add(I4('test1'))
def __init__(self):
super().__init__()
self.f = Fields()
self.f.add(U4('timeTag'))
self.f.add(X2('flags'))
self.f.add(U2('id'))
self.f.add(X4('data'))
def test_set_field2(self):
u = Fields()
u.add(U1('cmd'))
u.add(U1('val'))
u.cmd = 1
u.val = 3
assert u._fields['cmd'].value == 1
assert u._fields['val'].value == 3
def test_chars_invalid_length(self):
u = Fields()
u.add(CH(5, 'string'))
with pytest.raises(ValueError):
u.unpack(bytearray.fromhex('31 32')) # Too few bytes
with pytest.raises(ValueError):
u.unpack(bytearray.fromhex('31 32 33 34')) # Too few bytes
def test_set_field3(self):
u = Fields()
u.add(I4('test'))
u.add(U1('val'))
u.test = 0x12345678
u.val = 0xFF
assert u._fields['test'].value == 0x12345678
assert u._fields['val'].value == 0xFF
assert u.test == 0x12345678
assert u.val == 0xFF
def __init__(self):
super().__init__()
self.f = Fields()
self.f.add(U4('iTow'))
self.f.add(U1('version'))
self.f.add(X1('bitfield0'))
self.f.add(Padding(2, 'res1'))
self.f.add(I4('yaw')) # 1e-1 -> more likely 1e-2
self.f.add(I2('pitch')) # 1e-1
self.f.add(I2('roll')) # 1e-1
def test_pack2(self):
u = Fields()
u.add(I4('test'))
u.add(U1('val'))
u.add(Padding(2, 'res1'))
u.test = 0x76543210
u.val = 0xAF
data = u.pack()
assert data == bytearray.fromhex('10 32 54 76 AF 00 00')
def __init__(self):
super().__init__()
self.f = Fields()
self.f.add(U4('iTow'))
self.f.add(U1_GpsFix('gpsFix'))
self.f.add(X1_Flags('flags'))
self.f.add(X1('fixStat'))
self.f.add(X1('flags2'))
self.f.add(U4('ttff'))
self.f.add(U4('msss'))
def __init__(self):
super().__init__()
self.f = Fields()
self.f.add(U4('iTow'))
self.f.add(U1('version'))
self.f.add(U1_Flags('flags'))
self.f.add(U1('error'))
self.f.add(Padding(1, 'res1'))
self.f.add(U4('yaw')) # 1e-2, 0..+360
self.f.add(I2('pitch')) # 1e-2, -90..+90
self.f.add(I2('roll')) # 1e-2, -180..180
def unpack(self):
# Dynamically build fields based on message length
self.f = Fields()
self.f.add(CH(30, 'swVersion'))
self.f.add(CH(10, 'hwVersion'))
extra_length = len(self.data) - 40
extra_info = int(extra_length / 30)
for i in range(extra_info):
self.f.add(CH(30, f'extension_{i}'))
super().unpack()
def test_pack1(self):
u = Fields()
u.add(I4('test'))
u.add(U1('val'))
u.add(Padding(3, 'res1'))
u.add(U4('test2'))
u.test = 0x76543210
u.val = 0xAF
u.test2 = 0xcafebabe
data = u.pack()
print(data)
assert data == bytearray.fromhex('10 32 54 76 AF 00 00 00 be ba fe ca')
def unpack(self):
# Dynamically build fields based on message length
self.f = Fields()
self.f.add(U1('version'))
self.f.add(U1('numConfigs'))
self.f.add(Padding(2, 'res1'))
# Extract upto this place to read number of level arm configurations
super().unpack()
assert self.f.numConfigs <= 5
# Build final list
for lever in range(self.f.numConfigs):
self.f.add(U1_LeverArmType(f'leverArmType_{lever}'))
self.f.add(Padding(1, f'res2_{lever}'))
self.f.add(I2(f'leverArmX_{lever}'))
self.f.add(I2(f'leverArmY_{lever}'))
self.f.add(I2(f'leverArmZ_{lever}'))
super().unpack()
def unpack(self):
# Dynamically build fields based on message length
self.f = Fields()
self.f.add(U4('iTow'))
self.f.add(U1('version'))
self.f.add(X1_InitStatus1('initStatus1'))
self.f.add(X1_InitStatus2('initStatus2'))
self.f.add(Padding(5, 'res1'))
self.f.add(U1_FusionMode('fusionMode'))
self.f.add(Padding(2, 'res2'))
self.f.add(U1('numSens'))
# Extract upto this place to read number of sensors
super().unpack()
# Build final list
for sensor in range(self.f.numSens):
self.f.add(X1_SensStatus1(f'sensStatus1_{sensor}'))
self.f.add(X1_SensStatus2(f'sensStatus2_{sensor}'))
self.f.add(U1(f'freq_{sensor}'))
self.f.add(X1(f'faults_{sensor}'))
super().unpack()
def test_set_field1(self):
u = Fields()
u.add(U1('cmd'))
u.cmd = 1
assert u._fields['cmd'].value == 1
def test_chars_trailing_zeroes_removed(self):
u = Fields()
u.add(CH(10, 'string'))
u.unpack(bytearray.fromhex('41 42 43 44 45 00 00 00 00 00'))
assert u.string == 'ABCDE'
def test_creation(self):
u = Fields()
u.add(U1('cmd'))
def test_chars_invalid_unicode(self):
u = Fields()
u.add(CH(2, 'string'))
with pytest.raises(ValueError):
u.unpack(bytearray.fromhex('d8 00')) # UTF16 reserved code point
def test_basic_unpack(self):
u = Fields()
u.add(CH(4, 'string'))
u.unpack(bytearray.fromhex('41 42 43 44'))
assert u.string == 'ABCD'
def __init__(self):
super().__init__()
self.data = bytearray()
# TODO: Do we need checksum as member?
self.checksum = Checksum()
self.f = Fields()