1 files changed, 10 insertions, 1 deletions
diff --git a/test/test_sequnpack.py b/test/test_sequnpack.py
index 9f20c07..c091076 100644
--- a/test/test_sequnpack.py
+++ b/test/test_sequnpack.py
@@ -2,7 +2,7 @@
 # coding: utf-8
 import io
 from msgpack import Unpacker, BufferFull
-from msgpack import pack
+from msgpack import pack, packb
 from msgpack.exceptions import OutOfData
 from pytest import raises
 
@@ -78,6 +78,15 @@ def test_maxbuffersize():
     assert ord("b") == next(unpacker)
 
 
+def test_maxbuffersize_file():
+    buff = io.BytesIO(packb(b"a" * 10) + packb([b"a" * 20] * 2))
+    unpacker = Unpacker(buff, read_size=1, max_buffer_size=19, max_bin_len=20)
+    assert unpacker.unpack() == b"a" * 10
+    # assert unpacker.unpack() == [b"a" * 20]*2
+    with raises(BufferFull):
+        print(unpacker.unpack())
+
+
 def test_readbytes():
     unpacker = Unpacker(read_size=3)
     unpacker.feed(b"foobar")