subroutine test_multi_column() integer, parameter :: M = 2, N = 3 type(CSR_SparseMatrix_sp) :: mat(3) real :: x(3,N), y_found(3, M), y_expected(3,M) mat(1) = CSR_SparseMatrix_sp(M, N, 3) call add_row(mat(1), 1, 1, [1.,1.]) call add_row(mat(1), 2, 2, [1.]) mat(2) = CSR_SparseMatrix_sp(M, N, 3) call add_row(mat(2), 1, 2, [1.,1.]) call add_row(mat(2), 2, 3, [2.]) mat(3) = CSR_SparseMatrix_sp(M, N, 5) call add_row(mat(3), 1, 1, [1.,1.,1.]) call add_row(mat(3), 2, 2, [1.,2.]) x = 1 y_found = matmul(mat, x) y_expected(1,:) = [2.,1.] y_expected(2,:) = [2.,2.] y_expected(3,:) = [3.,3.] @assert_that(y_found, is(equal_to(y_expected))) end subroutine test_multi_column