Function TEST

tests/cpp/data/test_proxy_dmatrix.cc:14–30

namespace xgboost::data {
TEST(ProxyDMatrix, HostData) {
  DMatrixProxy proxy;
  std::size_t constexpr kRows = 100, kCols = 10;
  std::vector<HostDeviceVector<float>> label_storage(1);

  HostDeviceVector<float> storage;
  auto data =
      RandomDataGenerator(kRows, kCols, 0.5).Device(FstCU()).GenerateArrayInterface(&storage);

  proxy.SetArray(data.c_str());
  using cpu_impl::DispatchAny;

  auto n_samples = DispatchAny(&proxy, [](auto const &value) { return value.Size(); });
  ASSERT_EQ(n_samples, kRows);
  auto n_features = DispatchAny(&proxy, [](auto const &value) { return value.NumCols(); });
  ASSERT_EQ(n_features, kCols);
}
}  // namespace xgboost::data