def test_write_value_invalid_length():
buf = RawBuffer(FakeCPU())
buf.write_value(0, 4, 'descr1', 'one')
with py.test.raises(InvalidRawWrite):
buf.write_value(0, 5, 'descr1', 'two')
with py.test.raises(InvalidRawWrite):
buf.write_value(0, 4, 'descr2', 'two')
def __init__(self, cpu, logops, size, keybox, source_op):
AbstractVirtualValue.__init__(self, keybox, source_op)
# note that size is unused, because we assume that the buffer is big
# enough to write/read everything we need. If it's not, it's undefined
# behavior anyway, although in theory we could probably detect such
# cases here
self.size = size
self.buffer = RawBuffer(cpu, logops)
def test_write_value_update():
buf = RawBuffer(FakeCPU())
buf.write_value(0, 4, 'descr', 'one')
buf.write_value(4, 2, 'descr', 'two')
buf.write_value(0, 4, 'descr', 'ONE')
assert buf._get_memory() == [
(0, 4, 'descr', 'ONE'),
(4, 2, 'descr', 'two'),
]
def test_read_value():
buf = RawBuffer(FakeCPU())
buf.write_value(0, 4, 'descr', 'one')
buf.write_value(4, 4, 'descr', 'two')
assert buf.read_value(0, 4, 'descr') == 'one'
assert buf.read_value(4, 4, 'descr') == 'two'
with py.test.raises(InvalidRawRead):
buf.read_value(0, 2, 'descr')
with py.test.raises(InvalidRawRead):
buf.read_value(8, 2, 'descr')
with py.test.raises(InvalidRawRead):
buf.read_value(0, 4, 'another descr')
def test_write_value():
buf = RawBuffer(FakeCPU())
buf.write_value(8, 4, 'descr3', 'three')
buf.write_value(0, 4, 'descr1', 'one')
buf.write_value(4, 2, 'descr2', 'two')
buf.write_value(12, 2, 'descr4', 'four')
assert buf._get_memory() == [
(0, 4, 'descr1', 'one'),
(4, 2, 'descr2', 'two'),
(8, 4, 'descr3', 'three'),
(12, 2, 'descr4', 'four'),
]
def test_unpack_descrs():
ArrayS_8_1 = object()
ArrayS_8_2 = object()
ArrayU_8 = object()
class FakeCPU(object):
def unpack_arraydescr_size(self, descr):
if descr in (ArrayS_8_1, ArrayS_8_2):
return 0, 8, True
return 0, 8, False
buf = RawBuffer(FakeCPU())
buf.write_value(0, 4, ArrayS_8_1, 'one')
assert buf.read_value(0, 4, ArrayS_8_1) == 'one'
assert buf.read_value(0, 4,
ArrayS_8_2) == 'one' # with a non-identical descr
#
buf.write_value(0, 4, ArrayS_8_2, 'two') # with a non-identical descr
assert buf.read_value(0, 4, ArrayS_8_1) == 'two'
#
with py.test.raises(InvalidRawRead):
buf.read_value(0, 4, ArrayU_8)
with py.test.raises(InvalidRawWrite):
buf.write_value(0, 4, ArrayU_8, 'three')
def __init__(self, cpu, size=-1):
self.size = size
if self.size != -1:
self.buffer = RawBuffer(cpu, None)
def test_write_value_overlapping_prev():
buf = RawBuffer(FakeCPU())
buf.write_value(0, 4, 'descr', 'one')
with py.test.raises(InvalidRawWrite):
buf.write_value(2, 1, 'descr', 'two')
def test_write_value_overlapping_next():
buf = RawBuffer(FakeCPU())
buf.write_value(0, 4, 'descr', 'one')
buf.write_value(6, 4, 'descr', 'two')
with py.test.raises(InvalidRawWrite):
buf.write_value(4, 4, 'descr', 'three')
