def test_get_compression_info(self):
fn = '/tmp/test_get_compression_info.bag'
# No Compression
with rosbag.Bag(fn, mode='w') as bag:
for i in xrange(100):
bag.write("/test_bag", Int32(data=i))
with rosbag.Bag(fn) as bag:
info = bag.get_compression_info()
self.assertEquals(info.compression, rosbag.Compression.NONE)
# 167 Bytes of overhead, 50 Bytes per Int32.
self.assertEquals(info.uncompressed, 5167)
self.assertEquals(info.compressed, 5167)
with rosbag.Bag(fn, mode='w',
compression=rosbag.Compression.BZ2) as bag:
for i in xrange(100):
bag.write("/test_bag", Int32(data=i))
with rosbag.Bag(fn) as bag:
info = bag.get_compression_info()
self.assertEquals(info.compression, rosbag.Compression.BZ2)
self.assertEquals(info.uncompressed, 5167)
# the value varies each run, I suspect based on rand, but seems
# to generally be around 960 to 980 on my comp
self.assertLess(info.compressed, 1000)
self.assertGreater(info.compressed, 900)
def test_get_compression_info(self):
fn = '/tmp/test_get_compression_info.bag'
# No Compression
with rosbag.Bag(fn, mode='w') as bag:
for i in xrange(100):
bag.write("/test_bag", Int32(data=i))
with rosbag.Bag(fn) as bag:
info = bag.get_compression_info()
self.assertEquals(info.compression, rosbag.Compression.NONE)
# 167 Bytes of overhead, 50 Bytes per Int32.
self.assertEquals(info.uncompressed, 5166)
self.assertEquals(info.compressed, 5166)
with rosbag.Bag(fn, mode='w', compression=rosbag.Compression.BZ2) as bag:
for i in xrange(100):
bag.write("/test_bag", Int32(data=i))
with rosbag.Bag(fn) as bag:
info = bag.get_compression_info()
self.assertEquals(info.compression, rosbag.Compression.BZ2)
self.assertEquals(info.uncompressed, 5166)
# the value varies each run, I suspect based on rand, but seems
# to generally be around 960 to 980 on my comp
self.assertLess(info.compressed, 1000)
self.assertGreater(info.compressed, 900)