support for readonly buffers (#863) (#1466)
diff --git a/tests/test_buffers.py b/tests/test_buffers.py
index f006552..bf7aaed 100644
--- a/tests/test_buffers.py
+++ b/tests/test_buffers.py
@@ -1,8 +1,14 @@
+import io
import struct
+import sys
+
import pytest
+
from pybind11_tests import buffers as m
from pybind11_tests import ConstructorStats
+PY3 = sys.version_info[0] >= 3
+
pytestmark = pytest.requires_numpy
with pytest.suppress(ImportError):
@@ -85,3 +91,28 @@
buf.value = 0x12345678
value = struct.unpack('i', bytearray(buf))[0]
assert value == 0x12345678
+
+
+@pytest.unsupported_on_pypy
+def test_readonly_buffer():
+ buf = m.BufferReadOnly(0x64)
+ view = memoryview(buf)
+ assert view[0] == 0x64 if PY3 else b'd'
+ assert view.readonly
+
+
+@pytest.unsupported_on_pypy
+def test_selective_readonly_buffer():
+ buf = m.BufferReadOnlySelect()
+
+ memoryview(buf)[0] = 0x64 if PY3 else b'd'
+ assert buf.value == 0x64
+
+ io.BytesIO(b'A').readinto(buf)
+ assert buf.value == ord(b'A')
+
+ buf.readonly = True
+ with pytest.raises(TypeError):
+ memoryview(buf)[0] = 0 if PY3 else b'\0'
+ with pytest.raises(TypeError):
+ io.BytesIO(b'1').readinto(buf)