Function TEST

tests/cpp/data/test_array_interface.cc:12–31

namespace xgboost {
TEST(ArrayInterface, Initialize) {
  size_t constexpr kRows = 10, kCols = 10;
  HostDeviceVector<float> storage;
  auto array = RandomDataGenerator{kRows, kCols, 0}.GenerateArrayInterface(&storage);
  auto arr_interface = ArrayInterface<2>(StringView{array});
  ASSERT_EQ(arr_interface.Shape<0>(), kRows);
  ASSERT_EQ(arr_interface.Shape<1>(), kCols);
  ASSERT_EQ(arr_interface.data, storage.ConstHostPointer());
  ASSERT_EQ(arr_interface.ElementSize(), 4);
  ASSERT_EQ(arr_interface.type, ArrayInterfaceHandler::kF4);

  HostDeviceVector<size_t> u64_storage(storage.Size());
  std::string u64_arr_str{ArrayInterfaceStr(linalg::TensorView<size_t const, 2>{
      u64_storage.ConstHostSpan(), {kRows, kCols}, DeviceOrd::CPU()})};
  std::copy(storage.ConstHostVector().cbegin(), storage.ConstHostVector().cend(),
            u64_storage.HostSpan().begin());
  auto u64_arr = ArrayInterface<2>{u64_arr_str};
  ASSERT_EQ(u64_arr.ElementSize(), 8);
  ASSERT_EQ(u64_arr.type, ArrayInterfaceHandler::kU8);
}

TEST(ArrayInterface, Error) {
  constexpr size_t kRows = 16, kCols = 10;