Allow packed data to be captured while executing skip(), etc.

test/test_unpack_raw.py

@@ -0,0 +1,32 @@
+"""Tests for cases where the user seeks to obtain packed msgpack objects"""
+
+from nose import main
+from nose.tools import *
+import six
+from msgpack import Unpacker, packb
+
+def test_write_bytes():
+    unpacker = Unpacker()
+    unpacker.feed(b'abc')
+    f = six.BytesIO()
+    assert_equal(unpacker.unpack(f.write), ord('a'))
+    assert_equal(f.getvalue(), b'a')
+    f.truncate(0)
+    assert_is_none(unpacker.skip(f.write))
+    assert_equal(f.getvalue(), b'b')
+    f.truncate(0)
+    assert_is_none(unpacker.skip())
+    assert_equal(f.getvalue(), b'')
+
+def test_write_bytes_multi_buffer():
+    long_val = (5) * 100
+    expected = packb(long_val)
+    unpacker = Unpacker(six.BytesIO(expected), read_size=3, max_buffer_size=3)
+
+    f = six.BytesIO()
+    unpacked = unpacker.unpack(f.write)
+    assert_equal(unpacked, long_val)
+    assert_equal(f.getvalue(), expected)
+
+if __name__ == '__main__':
+    main()