boost/libs/numeric/ublas/test/comp_mat_erase.cpp

//  Copyright (c) 2011 David Bellot
//
//  Distributed under the Boost Software License, Version 1.0. (See
//  accompanying file LICENSE_1_0.txt or copy at
//  http://www.boost.org/LICENSE_1_0.txt)

#include <boost/numeric/ublas/matrix_sparse.hpp>

#define BOOST_TEST_MODULE SparseMatrixErasureTest
#include <boost/test/included/unit_test.hpp>


BOOST_AUTO_TEST_CASE( compressed_matrix_erase_after_end )
{
    boost::numeric::ublas::compressed_matrix<int, boost::numeric::ublas::row_major > A(2, 2);

    BOOST_CHECK_EQUAL( A.filled1(), (std::size_t) 1 );
    BOOST_CHECK_EQUAL( A.index1_data()[0], (std::size_t) 0 );

    A(0,0) = 1;

    BOOST_CHECK_EQUAL( A.nnz(), (std::size_t) 1 );
    BOOST_CHECK_EQUAL( A.filled1(), (std::size_t) 2 );

    // check new element
    BOOST_CHECK_EQUAL( A.index1_data()[0], (std::size_t) 0 );
    BOOST_CHECK_EQUAL( A.index2_data()[0], (std::size_t) 0 );
    BOOST_CHECK_EQUAL( A.value_data()[0], 1 );
    // check end of list marker
    BOOST_CHECK_EQUAL( A.index1_data()[1], (std::size_t) 1 );

    A.erase_element(1,0);

    BOOST_CHECK_EQUAL( A.nnz(), (std::size_t) 1 );
    BOOST_CHECK_EQUAL( A.filled1(), (std::size_t) 2 );
    BOOST_CHECK_EQUAL( A.filled2(), (std::size_t) 1 );

    // check new element
    BOOST_CHECK_EQUAL( A.index1_data()[0], (std::size_t) 0 );
    BOOST_CHECK_EQUAL( A.index2_data()[0], (std::size_t) 0 );
    BOOST_CHECK_EQUAL( A.value_data()[0], 1 );
    // check end of list marker
    BOOST_CHECK_EQUAL( A.index1_data()[1], (std::size_t) 1 );

    A.erase_element(0,0);

    BOOST_CHECK_EQUAL( A.nnz(), (std::size_t) 0 );
    BOOST_CHECK_EQUAL( A.filled1(), (std::size_t) 2 );
    BOOST_CHECK_EQUAL( A.filled2(),(std::size_t) 0 );
    BOOST_CHECK_EQUAL( A.index1_data()[0], (std::size_t) 0 );

}

BOOST_AUTO_TEST_CASE( compressed_matrix_erase_in_the_middle )
{
    boost::numeric::ublas::compressed_matrix<int, boost::numeric::ublas::row_major > A(2, 2);

    BOOST_CHECK_EQUAL( A.filled1(), (std::size_t) 1 );
    BOOST_CHECK_EQUAL( A.filled2(), (std::size_t) 0 );
    BOOST_CHECK_EQUAL( A.index1_data()[0], (std::size_t) 0 );

    A.insert_element(0,1,5);

    BOOST_CHECK_EQUAL( A.filled1(), (std::size_t) 2 );
    BOOST_CHECK_EQUAL( A.filled2(), (std::size_t) 1 );

    // check new element
    BOOST_CHECK_EQUAL( A.index1_data()[0], (std::size_t) 0 );
    BOOST_CHECK_EQUAL( A.index2_data()[0], (std::size_t) 1 );
    BOOST_CHECK_EQUAL( A.value_data()[0], 5 );
    // check end of list marker
    BOOST_CHECK_EQUAL( A.index1_data()[1], (std::size_t) 1 );

    A.insert_element(0,0,4);

    BOOST_CHECK_EQUAL( A.filled1(), (std::size_t) 2 );
    BOOST_CHECK_EQUAL( A.filled2(), (std::size_t) 2 );

    // check new element
    BOOST_CHECK_EQUAL( A.index2_data()[0], (std::size_t) 0 );
    BOOST_CHECK_EQUAL( A.value_data()[0], 4 );
    // check previous element
    BOOST_CHECK_EQUAL( A.index2_data()[1], (std::size_t) 1 );
    BOOST_CHECK_EQUAL( A.value_data()[1], 5 );
    // check end of list marker
    BOOST_CHECK_EQUAL( A.index1_data()[1], (std::size_t) 2 );

    A.erase_element(0,0);

    BOOST_CHECK_EQUAL( A.filled1(), (std::size_t) 2 );
    BOOST_CHECK_EQUAL( A.filled2(), (std::size_t) 1 );

    BOOST_CHECK_EQUAL( A.index2_data()[0], (std::size_t) 1 );
    BOOST_CHECK_EQUAL( A.value_data()[0], 5 );

    BOOST_CHECK_EQUAL( A.index1_data()[0], (std::size_t) 0 );
    BOOST_CHECK_EQUAL( A.index1_data()[1], (std::size_t) 1 );

    A.erase_element(0,1);

    BOOST_CHECK_EQUAL( A.filled1(), (std::size_t) 2 );
    BOOST_CHECK_EQUAL( A.filled2(), (std::size_t) 0 );
    BOOST_CHECK_EQUAL( A.index1_data()[0], (std::size_t) 0 );
    BOOST_CHECK_EQUAL( A.index1_data()[1], (std::size_t) 0 );

}