Function view_with_base_object

src/borrow/shared.rs:557–589

()

    #[test]
    fn view_with_base_object() {
        Python::attach(|py| {
            let array = Array::<f64, _>::zeros((1, 2, 3)).into_pyarray(py);

            let locals = [("array", &array)].into_py_dict(py).unwrap();
            let view = py
                .eval(c_str!("array[:,:,0]"), None, Some(&locals))
                .unwrap()
                .cast_into::<PyArray2<f64>>()
                .unwrap();
            assert_ne!(
                view.as_ptr().cast::<c_void>(),
                array.as_ptr().cast::<c_void>(),
            );

            let base = unsafe { (*view.as_array_ptr()).base };
            assert_eq!(base.cast::<c_void>(), array.as_ptr().cast::<c_void>());

            let base = unsafe { (*array.as_array_ptr()).base };
            assert!(!base.is_null());

            let base_address = base_address(py, view.as_array_ptr());
            assert_ne!(base_address, view.as_ptr().cast::<c_void>());
            assert_ne!(base_address, array.as_ptr().cast::<c_void>());
            assert_eq!(base_address, base.cast::<c_void>());

            let data_range = data_range(py, view.as_array_ptr());
            assert_eq!(data_range.0, array.data().cast::<c_char>());
            assert_eq!(data_range.1, unsafe {
                array.data().add(4).cast::<c_char>()
            });
        });
    }

    #[test]
    fn view_of_view_without_base_object() {