import re import pytest pytestmark = pytest.requires_numpy with pytest.suppress(ImportError): import numpy as np @pytest.fixture(scope='module') def simple_dtype(): ld = np.dtype('longdouble') return np.dtype({'names': ['bool_', 'uint_', 'float_', 'ldbl_'], 'formats': ['?', 'u4', 'f4', 'f{}'.format(ld.itemsize)], 'offsets': [0, 4, 8, (16 if ld.alignment > 4 else 12)]}) @pytest.fixture(scope='module') def packed_dtype(): return np.dtype([('bool_', '?'), ('uint_', 'u4'), ('float_', 'f4'), ('ldbl_', 'g')]) def dt_fmt(): from sys import byteorder e = '<' if byteorder == 'little' else '>' return ("{{'names':['bool_','uint_','float_','ldbl_']," " 'formats':['?','" + e + "u4','" + e + "f4','" + e + "f{}']," " 'offsets':[0,4,8,{}], 'itemsize':{}}}") def simple_dtype_fmt(): ld = np.dtype('longdouble') simple_ld_off = 12 + 4 * (ld.alignment > 4) return dt_fmt().format(ld.itemsize, simple_ld_off, simple_ld_off + ld.itemsize) def packed_dtype_fmt(): from sys import byteorder return "[('bool_', '?'), ('uint_', '{e}u4'), ('float_', '{e}f4'), ('ldbl_', '{e}f{}')]".format( np.dtype('longdouble').itemsize, e='<' if byteorder == 'little' else '>') def partial_ld_offset(): return 12 + 4 * (np.dtype('uint64').alignment > 4) + 8 + 8 * ( np.dtype('longdouble').alignment > 8) def partial_dtype_fmt(): ld = np.dtype('longdouble') partial_ld_off = partial_ld_offset() return dt_fmt().format(ld.itemsize, partial_ld_off, partial_ld_off + ld.itemsize) def partial_nested_fmt(): ld = np.dtype('longdouble') partial_nested_off = 8 + 8 * (ld.alignment > 8) partial_ld_off = partial_ld_offset() partial_nested_size = partial_nested_off * 2 + partial_ld_off + ld.itemsize return "{{'names':['a'], 'formats':[{}], 'offsets':[{}], 'itemsize':{}}}".format( partial_dtype_fmt(), partial_nested_off, partial_nested_size) def assert_equal(actual, expected_data, expected_dtype): np.testing.assert_equal(actual, np.array(expected_data, dtype=expected_dtype)) def test_format_descriptors(): from pybind11_tests import get_format_unbound, print_format_descriptors with pytest.raises(RuntimeError) as excinfo: get_format_unbound() assert re.match('^NumPy type info missing for .*UnboundStruct.*$', str(excinfo.value)) ld = np.dtype('longdouble') ldbl_fmt = ('4x' if ld.alignment > 4 else '') + ld.char ss_fmt = "T{?:bool_:3xI:uint_:f:float_:" + ldbl_fmt + ":ldbl_:}" dbl = np.dtype('double') partial_fmt = ("T{?:bool_:3xI:uint_:f:float_:" + str(4 * (dbl.alignment > 4) + dbl.itemsize + 8 * (ld.alignment > 8)) + "xg:ldbl_:}") nested_extra = str(max(8, ld.alignment)) assert print_format_descriptors() == [ ss_fmt, "T{?:bool_:^I:uint_:^f:float_:^g:ldbl_:}", "T{" + ss_fmt + ":a:T{?:bool_:^I:uint_:^f:float_:^g:ldbl_:}:b:}", partial_fmt, "T{" + nested_extra + "x" + partial_fmt + ":a:" + nested_extra + "x}", "T{3s:a:3s:b:}", 'T{q:e1:B:e2:}' ] def test_dtype(simple_dtype): from pybind11_tests import (print_dtypes, test_dtype_ctors, test_dtype_methods, trailing_padding_dtype, buffer_to_dtype) from sys import byteorder e = '<' if byteorder == 'little' else '>' assert print_dtypes() == [ simple_dtype_fmt(), packed_dtype_fmt(), "[('a', {}), ('b', {})]".format(simple_dtype_fmt(), packed_dtype_fmt()), partial_dtype_fmt(), partial_nested_fmt(), "[('a', 'S3'), ('b', 'S3')]", "[('e1', '" + e + "i8'), ('e2', 'u1')]", "[('x', 'i1'), ('y', '" + e + "u8')]" ] d1 = np.dtype({'names': ['a', 'b'], 'formats': ['int32', 'float64'], 'offsets': [1, 10], 'itemsize': 20}) d2 = np.dtype([('a', 'i4'), ('b', 'f4')]) assert test_dtype_ctors() == [np.dtype('int32'), np.dtype('float64'), np.dtype('bool'), d1, d1, np.dtype('uint32'), d2] assert test_dtype_methods() == [np.dtype('int32'), simple_dtype, False, True, np.dtype('int32').itemsize, simple_dtype.itemsize] assert trailing_padding_dtype() == buffer_to_dtype(np.zeros(1, trailing_padding_dtype())) def test_recarray(simple_dtype, packed_dtype): from pybind11_tests import (create_rec_simple, create_rec_packed, create_rec_nested, print_rec_simple, print_rec_packed, print_rec_nested, create_rec_partial, create_rec_partial_nested) elements = [(False, 0, 0.0, -0.0), (True, 1, 1.5, -2.5), (False, 2, 3.0, -5.0)] for func, dtype in [(create_rec_simple, simple_dtype), (create_rec_packed, packed_dtype)]: arr = func(0) assert arr.dtype == dtype assert_equal(arr, [], simple_dtype) assert_equal(arr, [], packed_dtype) arr = func(3) assert arr.dtype == dtype assert_equal(arr, elements, simple_dtype) assert_equal(arr, elements, packed_dtype) if dtype == simple_dtype: assert print_rec_simple(arr) == [ "s:0,0,0,-0", "s:1,1,1.5,-2.5", "s:0,2,3,-5" ] else: assert print_rec_packed(arr) == [ "p:0,0,0,-0", "p:1,1,1.5,-2.5", "p:0,2,3,-5" ] nested_dtype = np.dtype([('a', simple_dtype), ('b', packed_dtype)]) arr = create_rec_nested(0) assert arr.dtype == nested_dtype assert_equal(arr, [], nested_dtype) arr = create_rec_nested(3) assert arr.dtype == nested_dtype assert_equal(arr, [((False, 0, 0.0, -0.0), (True, 1, 1.5, -2.5)), ((True, 1, 1.5, -2.5), (False, 2, 3.0, -5.0)), ((False, 2, 3.0, -5.0), (True, 3, 4.5, -7.5))], nested_dtype) assert print_rec_nested(arr) == [ "n:a=s:0,0,0,-0;b=p:1,1,1.5,-2.5", "n:a=s:1,1,1.5,-2.5;b=p:0,2,3,-5", "n:a=s:0,2,3,-5;b=p:1,3,4.5,-7.5" ] arr = create_rec_partial(3) assert str(arr.dtype) == partial_dtype_fmt() partial_dtype = arr.dtype assert '' not in arr.dtype.fields assert partial_dtype.itemsize > simple_dtype.itemsize assert_equal(arr, elements, simple_dtype) assert_equal(arr, elements, packed_dtype) arr = create_rec_partial_nested(3) assert str(arr.dtype) == partial_nested_fmt() assert '' not in arr.dtype.fields assert '' not in arr.dtype.fields['a'][0].fields assert arr.dtype.itemsize > partial_dtype.itemsize np.testing.assert_equal(arr['a'], create_rec_partial(3)) def test_array_constructors(): from pybind11_tests import test_array_ctors data = np.arange(1, 7, dtype='int32') for i in range(8): np.testing.assert_array_equal(test_array_ctors(10 + i), data.reshape((3, 2))) np.testing.assert_array_equal(test_array_ctors(20 + i), data.reshape((3, 2))) for i in range(5): np.testing.assert_array_equal(test_array_ctors(30 + i), data) np.testing.assert_array_equal(test_array_ctors(40 + i), data) def test_string_array(): from pybind11_tests import create_string_array, print_string_array arr = create_string_array(True) assert str(arr.dtype) == "[('a', 'S3'), ('b', 'S3')]" assert print_string_array(arr) == [ "a='',b=''", "a='a',b='a'", "a='ab',b='ab'", "a='abc',b='abc'" ] dtype = arr.dtype assert arr['a'].tolist() == [b'', b'a', b'ab', b'abc'] assert arr['b'].tolist() == [b'', b'a', b'ab', b'abc'] arr = create_string_array(False) assert dtype == arr.dtype def test_enum_array(): from pybind11_tests import create_enum_array, print_enum_array from sys import byteorder e = '<' if byteorder == 'little' else '>' arr = create_enum_array(3) dtype = arr.dtype assert dtype == np.dtype([('e1', e + 'i8'), ('e2', 'u1')]) assert print_enum_array(arr) == [ "e1=A,e2=X", "e1=B,e2=Y", "e1=A,e2=X" ] assert arr['e1'].tolist() == [-1, 1, -1] assert arr['e2'].tolist() == [1, 2, 1] assert create_enum_array(0).dtype == dtype def test_signature(doc): from pybind11_tests import create_rec_nested assert doc(create_rec_nested) == "create_rec_nested(arg0: int) -> numpy.ndarray[NestedStruct]" def test_scalar_conversion(): from pybind11_tests import (create_rec_simple, f_simple, create_rec_packed, f_packed, create_rec_nested, f_nested, create_enum_array) n = 3 arrays = [create_rec_simple(n), create_rec_packed(n), create_rec_nested(n), create_enum_array(n)] funcs = [f_simple, f_packed, f_nested] for i, func in enumerate(funcs): for j, arr in enumerate(arrays): if i == j and i < 2: assert [func(arr[k]) for k in range(n)] == [k * 10 for k in range(n)] else: with pytest.raises(TypeError) as excinfo: func(arr[0]) assert 'incompatible function arguments' in str(excinfo.value) def test_register_dtype(): from pybind11_tests import register_dtype with pytest.raises(RuntimeError) as excinfo: register_dtype() assert 'dtype is already registered' in str(excinfo.value) @pytest.requires_numpy def test_compare_buffer_info(): from pybind11_tests import compare_buffer_info assert all(compare_buffer_info())