Add a test for np.bool_

Author: aldanor

tests/test_numpy_dtypes.cpp

@@ -467,6 +467,7 @@ test_initializer numpy_dtypes([](py::module &m) {
     m.def("f_packed", [](PackedStruct s) { return s.uint_ * 10; });
     m.def("f_nested", [](NestedStruct s) { return s.a.uint_ * 10; });
     m.def("register_dtype", []() { PYBIND11_NUMPY_DTYPE(SimpleStruct, bool_, uint_, float_, ldbl_); });
+    m.def("negate_bool", [](bool arg) { return !arg; });
 });
 
 #undef PYBIND11_PACKED

tests/test_numpy_dtypes.py

@@ -319,3 +319,10 @@ def test_register_dtype():
 def test_compare_buffer_info():
     from pybind11_tests import compare_buffer_info
     assert all(compare_buffer_info())
+
+
+@pytest.requires_numpy
+def test_numpy_bool():
+    from pybind11_tests import negate_bool
+    assert negate_bool(np.bool_(True)) is False
+    assert negate_bool(np.bool_(False)) is True