def test_get_receive_sequence_number1():
"""test for extracting min. number"""
iframe = IFrame()
iframe.set_control(bytes([112]))
assert 0 == iframe.get_receive_sequence_number()
def test_is_IFrame1():
"""test non-I-frame for being one."""
iframe = IFrame()
iframe.set_control(bytes([128]))
assert iframe.is_IFrame() is False
def test_get_receive_sequence_number0():
"""test for extracting max number"""
iframe = IFrame()
# 119 = 0x77 = 01110111
iframe.set_control(bytes([119]))
assert 7 == iframe.get_receive_sequence_number()
def test_is_IFrame0():
"""set I-frame bit and control for it."""
iframe = IFrame()
iframe.set_control(bytes([42]))
assert iframe.is_IFrame() is True
def test_get_control0():
"""test for retrieving set control field."""
iframe = IFrame()
iframe.set_control(bytes([42]))
assert bytes([42]) == iframe.get_control()
def test_set_control2():
"""test for setting 24 control bits"""
iframe = IFrame()
iframe.set_control(bytes([5, 23, 42]))
def test_set_control1():
"""test for passing Bytes array."""
iframe = IFrame()
with pytest.raises(TypeError):
iframe.set_control(bytearray(1))
def test_set_control0():
"""test for passing a bytes instance."""
iframe = IFrame()
iframe.set_control(bytes([42]))
