Method SetUp

cpp/src/arrow/sparse_tensor_test.cc:1056–1076

class TestSparseCSCMatrixBase : public TestSparseTensorBase<Int64Type> {
 public:
  void SetUp() {
    shape_ = {6, 4};
    dim_names_ = {"foo", "bar"};

    // Dense representation:
    // [
    //    1  0  2  0
    //    0  3  0  4
    //    5  0  6  0
    //    0 11  0 12
    //   13  0 14  0
    //    0 15  0 16
    // ]
    dense_values_ = {1, 0,  2, 0,  0,  3, 0,  4, 5, 0,  6, 0,
                     0, 11, 0, 12, 13, 0, 14, 0, 0, 15, 0, 16};
    auto dense_data = Buffer::Wrap(dense_values_);
    NumericTensor<Int64Type> dense_tensor(dense_data, shape_, {}, dim_names_);
    ASSERT_OK_AND_ASSIGN(sparse_tensor_from_dense_,
                         SparseCSCMatrix::Make(
                             dense_tensor, TypeTraits<IndexValueType>::type_singleton()));
  }

 protected:
  std::vector<int64_t> dense_values_;