test_drc_tuner_agreement.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright The KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

 
#include <qa_utils/wx_utils/unit_test_utils.h>
#include <pcbnew_utils/board_test_utils.h>
#include <board.h>
#include <pcb_track.h>
#include <length_delay_calculation/length_delay_calculation.h>
#include <length_delay_calculation/length_delay_calculation_item.h>
#include <settings/settings_manager.h>
 
 
struct TUNER_DRC_TEST_FIXTURE
{
    TUNER_DRC_TEST_FIXTURE() {}
 
    SETTINGS_MANAGER       m_settingsManager;
    std::unique_ptr<BOARD> m_board;
};
 

BOOST_FIXTURE_TEST_CASE( LengthCalculationIncludesAllWidths, TUNER_DRC_TEST_FIXTURE )
{
    // Load a board that has tracks with different widths on the same net
    KI_TEST::LoadBoard( m_settingsManager, "issue18045/test_proj", m_board );
 
    LENGTH_DELAY_CALCULATION* lengthCalc = m_board->GetLengthCalculation();
 
    // Find a net that has tracks with different widths
    NETINFO_ITEM* testNet = m_board->FindNet( "/TEST1_P" );
    BOOST_REQUIRE( testNet != nullptr );
 
    // Collect all tracks on this net and verify they have multiple widths
    std::vector<LENGTH_DELAY_CALCULATION_ITEM> lengthItems;
    std::set<int> widths;
 
    for( PCB_TRACK* track : m_board->Tracks() )
    {
        if( track->GetNetCode() != testNet->GetNetCode() )
            continue;
 
        if( track->Type() == PCB_TRACE_T )
            widths.insert( track->GetWidth() );
 
        LENGTH_DELAY_CALCULATION_ITEM item = lengthCalc->GetLengthCalculationItem( track );
 
        if( item.Type() != LENGTH_DELAY_CALCULATION_ITEM::TYPE::UNKNOWN )
            lengthItems.emplace_back( item );
    }
 
    BOOST_TEST_MESSAGE( wxString::Format( "Found %zu different track widths on net /TEST1_P", widths.size() ) );
 
    // The test board should have at least 2 different widths to be a valid test case
    BOOST_REQUIRE_GE( widths.size(), 2 );
 
    // Calculate total length including all track widths
    constexpr PATH_OPTIMISATIONS opts = {
        .OptimiseViaLayers = true, .MergeTracks = true, .OptimiseTracesInPads = true, .InferViaInPad = false
    };
    LENGTH_DELAY_STATS stats = lengthCalc->CalculateLengthDetails( lengthItems, opts, nullptr, nullptr,
                                                                    LENGTH_DELAY_LAYER_OPT::NO_LAYER_DETAIL,
                                                                    LENGTH_DELAY_DOMAIN_OPT::NO_DELAY_DETAIL );
 
    BOOST_TEST_MESSAGE( wxString::Format( "Total track length: %lld nm", stats.TrackLength ) );
    BOOST_CHECK_GT( stats.TrackLength, 0 );
 
    // Verify that all track segments contributed to the length
    BOOST_CHECK_GT( lengthItems.size(), 0 );
}