def test_numpy_ref_mutators(): """Tests numpy mutating Eigen matrices (for returned Eigen::Ref<...>s)""" from pybind11_tests import ( get_cm_ref, get_cm_const_ref, get_rm_ref, get_rm_const_ref, reset_refs) reset_refs() # In case another test already changed it zc = get_cm_ref() zcro = get_cm_const_ref() zr = get_rm_ref() zrro = get_rm_const_ref() assert [zc[1, 2], zcro[1, 2], zr[1, 2], zrro[1, 2]] == [23] * 4 assert not zc.flags.owndata and zc.flags.writeable assert not zr.flags.owndata and zr.flags.writeable assert not zcro.flags.owndata and not zcro.flags.writeable assert not zrro.flags.owndata and not zrro.flags.writeable zc[1, 2] = 99 expect = np.array([[11., 12, 13], [21, 22, 99], [31, 32, 33]]) # We should have just changed zc, of course, but also zcro and the original eigen matrix assert np.all(zc == expect) assert np.all(zcro == expect) assert np.all(get_cm_ref() == expect) zr[1, 2] = 99 assert np.all(zr == expect) assert np.all(zrro == expect) assert np.all(get_rm_ref() == expect) # Make sure the readonly ones are numpy-readonly: with pytest.raises(ValueError): zcro[1, 2] = 6 with pytest.raises(ValueError): zrro[1, 2] = 6 # We should be able to explicitly copy like this (and since we're copying, # the const should drop away) y1 = np.array(get_cm_const_ref()) assert y1.flags.owndata and y1.flags.writeable # We should get copies of the eigen data, which was modified above: assert y1[1, 2] == 99 y1[1, 2] += 12 assert y1[1, 2] == 111 assert zc[1, 2] == 99 # Make sure we aren't referencing the original
def test_cpp_casting(): from pybind11_tests import (cpp_copy, cpp_ref_c, cpp_ref_r, cpp_ref_any, fixed_r, fixed_c, get_cm_ref, get_rm_ref, ReturnTester) assert cpp_copy(fixed_r()) == 22. assert cpp_copy(fixed_c()) == 22. z = np.array([[5., 6], [7, 8]]) assert cpp_copy(z) == 7. assert cpp_copy(get_cm_ref()) == 21. assert cpp_copy(get_rm_ref()) == 21. assert cpp_ref_c(get_cm_ref()) == 21. assert cpp_ref_r(get_rm_ref()) == 21. with pytest.raises(RuntimeError) as excinfo: # Can't reference fixed_c: it contains floats, cpp_ref_any wants doubles cpp_ref_any(fixed_c()) assert 'Unable to cast Python instance' in str(excinfo.value) with pytest.raises(RuntimeError) as excinfo: # Can't reference fixed_r: it contains floats, cpp_ref_any wants doubles cpp_ref_any(fixed_r()) assert 'Unable to cast Python instance' in str(excinfo.value) assert cpp_ref_any(ReturnTester.create()) == 1. assert cpp_ref_any(get_cm_ref()) == 21. assert cpp_ref_any(get_cm_ref()) == 21.