EvaluateRank0TestHelpers.hpp

// Distributed under the MIT License.
// See LICENSE.txt for details.
 
#pragma once
 
#include "DataStructures/Tensor/Expressions/Evaluate.hpp"
#include "DataStructures/Tensor/Expressions/TensorExpression.hpp"
#include "DataStructures/Tensor/Tensor.hpp"
 
namespace TestHelpers::TensorExpressions {
 
/// \ingroup TestingFrameworkGroup
/// \brief Test that evaluating a right hand side tensor expression containing a
/// single rank 0 tensor correctly assigns the data to the evaluated left hand
/// side tensor
///
/// \param data the data being stored in the Tensors
template <typename DataType>
void test_evaluate_rank_0(const DataType& data) noexcept {
  const Tensor<DataType> R{{{data}}};
 
  // Use explicit type (vs auto) so the compiler checks the return type of
  // `evaluate`
  const Tensor<DataType> L = ::TensorExpressions::evaluate(R());
 
  CHECK(L.get() == data);
}
 
}  // namespace TestHelpers::TensorExpressions