nac3/nac3core/irrt/test/test_ndarray_broadcast.hpp

#pragma once

#include <test/includes.hpp>

namespace test {
namespace ndarray_broadcast {
void test_can_broadcast_shape() {
    BEGIN_TEST();

    assert_values_match(true,
                        ndarray::broadcast::util::can_broadcast_shape_to(
                            1, (int32_t[]){3}, 5, (int32_t[]){1, 1, 1, 1, 3}));
    assert_values_match(false, ndarray::broadcast::util::can_broadcast_shape_to(
                                   1, (int32_t[]){3}, 2, (int32_t[]){3, 1}));
    assert_values_match(true, ndarray::broadcast::util::can_broadcast_shape_to(
                                  1, (int32_t[]){3}, 1, (int32_t[]){3}));
    assert_values_match(false, ndarray::broadcast::util::can_broadcast_shape_to(
                                   1, (int32_t[]){1}, 1, (int32_t[]){3}));
    assert_values_match(true, ndarray::broadcast::util::can_broadcast_shape_to(
                                  1, (int32_t[]){1}, 1, (int32_t[]){1}));
    assert_values_match(
        true, ndarray::broadcast::util::can_broadcast_shape_to(
                  3, (int32_t[]){256, 256, 3}, 3, (int32_t[]){256, 1, 3}));
    assert_values_match(true,
                        ndarray::broadcast::util::can_broadcast_shape_to(
                            3, (int32_t[]){256, 256, 3}, 1, (int32_t[]){3}));
    assert_values_match(false,
                        ndarray::broadcast::util::can_broadcast_shape_to(
                            3, (int32_t[]){256, 256, 3}, 1, (int32_t[]){2}));
    assert_values_match(true,
                        ndarray::broadcast::util::can_broadcast_shape_to(
                            3, (int32_t[]){256, 256, 3}, 1, (int32_t[]){1}));

    // In cases when the shapes contain zero(es)
    assert_values_match(true, ndarray::broadcast::util::can_broadcast_shape_to(
                                  1, (int32_t[]){0}, 1, (int32_t[]){1}));
    assert_values_match(false, ndarray::broadcast::util::can_broadcast_shape_to(
                                   1, (int32_t[]){0}, 1, (int32_t[]){2}));
    assert_values_match(true,
                        ndarray::broadcast::util::can_broadcast_shape_to(
                            4, (int32_t[]){0, 4, 0, 0}, 1, (int32_t[]){1}));
    assert_values_match(
        true, ndarray::broadcast::util::can_broadcast_shape_to(
                  4, (int32_t[]){0, 4, 0, 0}, 4, (int32_t[]){1, 1, 1, 1}));
    assert_values_match(
        true, ndarray::broadcast::util::can_broadcast_shape_to(
                  4, (int32_t[]){0, 4, 0, 0}, 4, (int32_t[]){1, 4, 1, 1}));
    assert_values_match(false, ndarray::broadcast::util::can_broadcast_shape_to(
                                   2, (int32_t[]){4, 3}, 2, (int32_t[]){0, 3}));
    assert_values_match(false, ndarray::broadcast::util::can_broadcast_shape_to(
                                   2, (int32_t[]){4, 3}, 2, (int32_t[]){0, 0}));
}

void test_ndarray_broadcast() {
    /*
    # array = np.array([[19.9, 29.9, 39.9, 49.9]], dtype=np.float64)
    # >>> [[19.9 29.9 39.9 49.9]]
    #
    # array = np.broadcast_to(array, (2, 3, 4))
    # >>> [[[19.9 29.9 39.9 49.9]
    # >>>   [19.9 29.9 39.9 49.9]
    # >>>   [19.9 29.9 39.9 49.9]]
    # >>>  [[19.9 29.9 39.9 49.9]
    # >>>   [19.9 29.9 39.9 49.9]
    # >>>   [19.9 29.9 39.9 49.9]]]
    #
    # assery array.strides == (0, 0, 8)

    */
    BEGIN_TEST();

    double in_data[4] = {19.9, 29.9, 39.9, 49.9};
    const int32_t in_ndims = 2;
    int32_t in_shape[in_ndims] = {1, 4};
    int32_t in_strides[in_ndims] = {};
    NDArray<int32_t> ndarray = {.data = (uint8_t*)in_data,
                                .itemsize = sizeof(double),
                                .ndims = in_ndims,
                                .shape = in_shape,
                                .strides = in_strides};
    ndarray::basic::set_strides_by_shape(&ndarray);

    const int32_t dst_ndims = 3;
    int32_t dst_shape[dst_ndims] = {2, 3, 4};
    int32_t dst_strides[dst_ndims] = {};
    NDArray<int32_t> dst_ndarray = {
        .ndims = dst_ndims, .shape = dst_shape, .strides = dst_strides};

    ndarray::broadcast::broadcast_to(&ndarray, &dst_ndarray);

    assert_arrays_match(dst_ndims, ((int32_t[]){0, 0, 8}), dst_ndarray.strides);

    assert_values_match(19.9,
                        *((double*)ndarray::basic::get_pelement_by_indices(
                            &dst_ndarray, ((int32_t[]){0, 0, 0}))));
    assert_values_match(29.9,
                        *((double*)ndarray::basic::get_pelement_by_indices(
                            &dst_ndarray, ((int32_t[]){0, 0, 1}))));
    assert_values_match(39.9,
                        *((double*)ndarray::basic::get_pelement_by_indices(
                            &dst_ndarray, ((int32_t[]){0, 0, 2}))));
    assert_values_match(49.9,
                        *((double*)ndarray::basic::get_pelement_by_indices(
                            &dst_ndarray, ((int32_t[]){0, 0, 3}))));
    assert_values_match(19.9,
                        *((double*)ndarray::basic::get_pelement_by_indices(
                            &dst_ndarray, ((int32_t[]){0, 1, 0}))));
    assert_values_match(29.9,
                        *((double*)ndarray::basic::get_pelement_by_indices(
                            &dst_ndarray, ((int32_t[]){0, 1, 1}))));
    assert_values_match(39.9,
                        *((double*)ndarray::basic::get_pelement_by_indices(
                            &dst_ndarray, ((int32_t[]){0, 1, 2}))));
    assert_values_match(49.9,
                        *((double*)ndarray::basic::get_pelement_by_indices(
                            &dst_ndarray, ((int32_t[]){0, 1, 3}))));
    assert_values_match(49.9,
                        *((double*)ndarray::basic::get_pelement_by_indices(
                            &dst_ndarray, ((int32_t[]){1, 2, 3}))));
}

void run() {
    test_can_broadcast_shape();
    test_ndarray_broadcast();
}
}  // namespace ndarray_broadcast
}  // namespace test