Add test for #526

Author: methane

test/test_memoryview.py

@@ -96,3 +96,11 @@ def test_bin32_from_byte():
 
 def test_bin32_from_float():
     _runtest("f", 2**16, b"\xc6", b"\x00\x01\x00\x00", True)
+
+
+def test_multidim_memoryview():
+    # See https://github.com/msgpack/msgpack-python/issues/526
+    view = memoryview(b"\00" * 6)
+    view.cast(view.format, (3, 2))
+    packed = msgpack.packb(view)
+    assert packed == b'\xc4\x06\x00\x00\x00\x00\x00\x00'