def test_writing_and_reading(self):
writer = TFWriter.create(LE_MSG_SPEC, BUFSIZE)
writer.clear() # should not be necessary
buf = writer.buffer
# reader and writer share same buffer
reader = TFReader(LE_MSG_SPEC, BUFSIZE, buf)
tstamp = int(time.time())
node_id = bytearray(20) # 160 bit
RNG.next_bytes(node_id) # .... random value
key = bytearray(20) # 160 bit
RNG.next_bytes(key) # .... random value
length = RNG.next_int32()
by_ = RNG.next_file_name(16)
path = 'path/to/' + RNG.next_file_name(16)
nnn = 0 # 0-based field number
# write a log entry into the buffer
writer.put_next(nnn, tstamp)
nnn = nnn + 1
writer.put_next(nnn, node_id)
nnn = nnn + 1
writer.put_next(nnn, key)
nnn = nnn + 1
writer.put_next(nnn, length)
nnn = nnn + 1
writer.put_next(nnn, by_)
nnn = nnn + 1
writer.put_next(nnn, path)
# now read the buffer to see what actually was written
self.assertEqual(0, reader.position)
reader.get_next()
self.assertEqual(0, reader.field_nbr)
self.assertEqual('fuint32', FieldStr.as_str(reader.field_type))
self.assertEqual(tstamp, reader.value)
self.assertEqual(5, reader.position)
reader.get_next()
self.assertEqual(1, reader.field_nbr)
self.assertEqual('fbytes20', FieldStr.as_str(reader.field_type))
self.assertEqual(node_id, reader.value)
self.assertEqual(26, reader.position)
reader.get_next()
self.assertEqual(2, reader.field_nbr)
self.assertEqual('fbytes20', FieldStr.as_str(reader.field_type))
self.assertEqual(key, reader.value)
self.assertEqual(47, reader.position)
reader.get_next()
self.assertEqual(3, reader.field_nbr)
self.assertEqual('vuint32', FieldStr.as_str(reader.field_type))
self.assertEqual(length, reader.value)
reader.get_next()
self.assertEqual(4, reader.field_nbr)
self.assertEqual('lstring', FieldStr.as_str(reader.field_type))
self.assertEqual(by_, reader.value)
reader.get_next()
self.assertEqual(5, reader.field_nbr)
self.assertEqual('lstring', FieldStr.as_str(reader.field_type))
self.assertEqual(path, reader.value)
def test_reader_creator(self):
BUFSIZE = 1024
tf_reader = TFReader.create(TEST_MSG_SPEC, BUFSIZE)
self.assertTrue(isinstance(tf_reader, TFReader))
self.assertEqual(0, tf_reader.position)
self.assertEqual(BUFSIZE, tf_reader.capacity)