testcase

BOOST_AUTO_TEST_CASE(SplitDataResultField)
{
  field<mat> input(1, 2);

  mat matA(2, 10);
  mat matB(2, 10);

  size_t count = 0; // Counter for unique sequential values.
  matA.imbue([&count]() { return ++count; });
  matB.imbue([&count]() { return ++count; });

  input(0, 0) = matA;
  input(0, 1) = matB;

  const auto value = Split(input, 0.5, false);
  BOOST_REQUIRE_EQUAL(std::get<0>(value).n_cols, 1); // Train data.
  BOOST_REQUIRE_EQUAL(std::get<1>(value).n_cols, 1); // Test data.

  field<mat> concat = {std::get<0>(value)(0), std::get<1>(value)(0)};
  // Order matters here.
  CheckFields(input, concat);
}