test_net_settings.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 3 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, see <https://www.gnu.org/licenses/>.
 */
 
#include <boost/test/unit_test.hpp>
 
#include <project/net_settings.h>
#include <netclass.h>
#include <settings/json_settings_internals.h>
#include <settings/settings_manager.h>
 
#include <wx/filename.h>
#include <wx/stdpaths.h>
#include <wx/utils.h>
 
#include <fstream>
 
 
BOOST_AUTO_TEST_SUITE( NetSettingsTests )
 
 
// Regression guard for the dirty-check used by the project save framework.
// Without m_netChainClasses included in operator==, edits to chain-class
// assignments returned "no change" and were silently dropped on close.
BOOST_AUTO_TEST_CASE( ChainClassAssignmentAffectsEquality )
{
    NET_SETTINGS a( nullptr, "" );
    NET_SETTINGS b( nullptr, "" );
 
    BOOST_CHECK( a == b );
 
    a.SetNetChainClass( wxS( "CHAIN_A" ), wxS( "Default" ) );
 
    BOOST_CHECK( a != b );
 
    b.SetNetChainClass( wxS( "CHAIN_A" ), wxS( "Default" ) );
 
    BOOST_CHECK( a == b );
}
 
 
// Verify that differing chain-class values (same chain key) compare unequal,
// and that clearing an assignment via empty class string restores equality.
BOOST_AUTO_TEST_CASE( ChainClassValueAndClearAffectEquality )
{
    NET_SETTINGS a( nullptr, "" );
    NET_SETTINGS b( nullptr, "" );
 
    a.SetNetChainClass( wxS( "CHAIN_A" ), wxS( "Default" ) );
    b.SetNetChainClass( wxS( "CHAIN_A" ), wxS( "HighSpeed" ) );
 
    BOOST_CHECK( a != b );
 
    b.SetNetChainClass( wxS( "CHAIN_A" ), wxS( "Default" ) );
 
    BOOST_CHECK( a == b );
 
    a.SetNetChainClass( wxS( "CHAIN_A" ), wxString() );
 
    BOOST_CHECK( a != b );
 
    b.SetNetChainClass( wxS( "CHAIN_A" ), wxString() );
 
    BOOST_CHECK( a == b );
}
 
 
// Asymmetric-size guard for the std::equal calls in operator==. A 3-iterator
// std::equal returns true when the LHS is a prefix of the RHS, which silently
// dropped one-sided edits.
BOOST_AUTO_TEST_CASE( AssignmentSizeDifferencesAffectEquality )
{
    NET_SETTINGS a( nullptr, "" );
    NET_SETTINGS b( nullptr, "" );
 
    b.SetNetclassLabelAssignment( wxS( "NET_A" ), { wxS( "Default" ) } );
 
    BOOST_CHECK( a != b );
    BOOST_CHECK( b != a );
}
 
 
// Returns true if the effective netclass for aNetName resolves to a netclass named aExpected,
// either directly or as a constituent of a composite effective netclass.
static bool resolvesToNetclass( NET_SETTINGS& aSettings, const wxString& aNetName,
                                const wxString& aExpected )
{
    std::shared_ptr<NETCLASS> resolved = aSettings.GetEffectiveNetClass( aNetName );
 
    if( !resolved )
        return false;
 
    if( resolved->GetName() == aExpected )
        return true;
 
    for( NETCLASS* constituent : resolved->GetConstituentNetclasses() )
    {
        if( constituent && constituent->GetName() == aExpected )
            return true;
    }
 
    return false;
}
 
 
// Chain-derived netclass pattern assignments must contribute to effective netclass resolution
// alongside user-authored patterns, but must be cleanable independently so stale chain entries
// do not persist across netlist updates.
BOOST_AUTO_TEST_CASE( ChainPatternAssignmentResolvesAndClears )
{
    NET_SETTINGS settings( nullptr, "" );
 
    std::shared_ptr<NETCLASS> highSpeed = std::make_shared<NETCLASS>( wxS( "HighSpeed" ), false );
    std::map<wxString, std::shared_ptr<NETCLASS>> classes;
    classes[wxS( "HighSpeed" )] = highSpeed;
    settings.SetNetclasses( classes );
 
    settings.SetChainPatternAssignment( NET_CHAIN_SOURCE::SCHEMATIC, wxS( "DDR_DQ0" ), wxS( "HighSpeed" ) );
 
    BOOST_CHECK( resolvesToNetclass( settings, wxS( "DDR_DQ0" ), wxS( "HighSpeed" ) ) );
 
    settings.ClearChainPatternAssignments( NET_CHAIN_SOURCE::SCHEMATIC );
 
    BOOST_CHECK( !resolvesToNetclass( settings, wxS( "DDR_DQ0" ), wxS( "HighSpeed" ) ) );
}
 
 
// Clearing chain-derived patterns must not disturb user-authored patterns.
BOOST_AUTO_TEST_CASE( ClearChainPatternAssignmentsLeavesUserPatterns )
{
    NET_SETTINGS settings( nullptr, "" );
 
    std::shared_ptr<NETCLASS> highSpeed = std::make_shared<NETCLASS>( wxS( "HighSpeed" ), false );
    std::shared_ptr<NETCLASS> power = std::make_shared<NETCLASS>( wxS( "Power" ), false );
    std::map<wxString, std::shared_ptr<NETCLASS>> classes;
    classes[wxS( "HighSpeed" )] = highSpeed;
    classes[wxS( "Power" )] = power;
    settings.SetNetclasses( classes );
 
    settings.SetNetclassPatternAssignment( wxS( "VCC_*" ), wxS( "Power" ) );
    settings.SetChainPatternAssignment( NET_CHAIN_SOURCE::SCHEMATIC, wxS( "DDR_DQ0" ), wxS( "HighSpeed" ) );
 
    BOOST_CHECK( resolvesToNetclass( settings, wxS( "VCC_3V3" ), wxS( "Power" ) ) );
    BOOST_CHECK( resolvesToNetclass( settings, wxS( "DDR_DQ0" ), wxS( "HighSpeed" ) ) );
 
    settings.ClearChainPatternAssignments( NET_CHAIN_SOURCE::SCHEMATIC );
 
    BOOST_CHECK( resolvesToNetclass( settings, wxS( "VCC_3V3" ), wxS( "Power" ) ) );
    BOOST_CHECK( !resolvesToNetclass( settings, wxS( "DDR_DQ0" ), wxS( "HighSpeed" ) ) );
}
 
 
// The schematic and the board share one NET_SETTINGS and each derives chain patterns from the
// membership only it can see.  A rebuild by one must leave the other's entries alone, otherwise a
// board resync before DRC or save reverts the schematic's chain netclasses.
BOOST_AUTO_TEST_CASE( ChainPatternAssignmentSourcesAreIndependent )
{
    NET_SETTINGS settings( nullptr, "" );
 
    std::shared_ptr<NETCLASS> highSpeed = std::make_shared<NETCLASS>( wxS( "HighSpeed" ), false );
    std::shared_ptr<NETCLASS> power = std::make_shared<NETCLASS>( wxS( "Power" ), false );
    std::map<wxString, std::shared_ptr<NETCLASS>> classes;
    classes[wxS( "HighSpeed" )] = highSpeed;
    classes[wxS( "Power" )] = power;
    settings.SetNetclasses( classes );
 
    settings.SetChainPatternAssignment( NET_CHAIN_SOURCE::SCHEMATIC, wxS( "DDR_DQ0" ),
                                        wxS( "HighSpeed" ) );
    settings.SetChainPatternAssignment( NET_CHAIN_SOURCE::BOARD, wxS( "VCC_3V3" ),
                                        wxS( "Power" ) );
 
    BOOST_REQUIRE( resolvesToNetclass( settings, wxS( "DDR_DQ0" ), wxS( "HighSpeed" ) ) );
    BOOST_REQUIRE( resolvesToNetclass( settings, wxS( "VCC_3V3" ), wxS( "Power" ) ) );
 
    settings.ClearChainPatternAssignments( NET_CHAIN_SOURCE::BOARD );
 
    BOOST_CHECK( resolvesToNetclass( settings, wxS( "DDR_DQ0" ), wxS( "HighSpeed" ) ) );
    BOOST_CHECK( !resolvesToNetclass( settings, wxS( "VCC_3V3" ), wxS( "Power" ) ) );
    BOOST_CHECK( settings.HasChainPatternAssignments( NET_CHAIN_SOURCE::SCHEMATIC ) );
    BOOST_CHECK( !settings.HasChainPatternAssignments( NET_CHAIN_SOURCE::BOARD ) );
 
    settings.ClearChainPatternAssignments( NET_CHAIN_SOURCE::SCHEMATIC );
 
    BOOST_CHECK( !resolvesToNetclass( settings, wxS( "DDR_DQ0" ), wxS( "HighSpeed" ) ) );
}
 
 
// ClearNetChainClasses must remove all chain->class entries.
BOOST_AUTO_TEST_CASE( ClearNetChainClassesRemovesAllEntries )
{
    NET_SETTINGS settings( nullptr, "" );
 
    settings.SetNetChainClass( wxS( "CHAIN_A" ), wxS( "Default" ) );
    settings.SetNetChainClass( wxS( "CHAIN_B" ), wxS( "HighSpeed" ) );
 
    BOOST_CHECK_EQUAL( settings.GetNetChainClasses().size(), 2u );
 
    settings.ClearNetChainClasses();
 
    BOOST_CHECK( settings.GetNetChainClasses().empty() );
    BOOST_CHECK( settings.GetNetChainClass( wxS( "CHAIN_A" ) ).IsEmpty() );
}
 
 
// m_netClassChainPatternAssignments is derived state rebuilt from m_netChainNetClasses plus the
// current chain membership.  It must NOT contribute to operator==, otherwise a no-op netlist
// rebuild marks the project dirty even when the user made no edit.  The persisted
// m_netChainNetClasses map (covered below) is the source of truth for equality.
BOOST_AUTO_TEST_CASE( ChainPatternAssignmentExcludedFromEquality )
{
    NET_SETTINGS a( nullptr, "" );
    NET_SETTINGS b( nullptr, "" );
 
    std::shared_ptr<NETCLASS> highSpeed = std::make_shared<NETCLASS>( wxS( "HighSpeed" ), false );
    std::shared_ptr<NETCLASS> power = std::make_shared<NETCLASS>( wxS( "Power" ), false );
    std::map<wxString, std::shared_ptr<NETCLASS>> classes;
    classes[wxS( "HighSpeed" )] = highSpeed;
    classes[wxS( "Power" )] = power;
 
    a.SetNetclasses( classes );
    b.SetNetclasses( classes );
 
    BOOST_CHECK( a == b );
 
    a.SetChainPatternAssignment( NET_CHAIN_SOURCE::SCHEMATIC, wxS( "DDR_DQ0" ), wxS( "HighSpeed" ) );
 
    BOOST_CHECK( a == b );
 
    a.SetChainPatternAssignment( NET_CHAIN_SOURCE::SCHEMATIC, wxS( "VCC_3V3" ), wxS( "Power" ) );
    b.SetChainPatternAssignment( NET_CHAIN_SOURCE::BOARD, wxS( "OTHER" ), wxS( "HighSpeed" ) );
 
    BOOST_CHECK( a == b );
 
    a.ClearChainPatternAssignments( NET_CHAIN_SOURCE::SCHEMATIC );
 
    BOOST_CHECK( a == b );
}
 
 
// Persisted-state regression guard for the "net_chain_classes" JSON key.  In-memory
// equality tests cannot detect a renamed/missing JSON key or a broken read lambda --
// those failures present as silent loss of every chain->class assignment on project
// reopen.  Exercise the full Store -> serialize -> parse -> Load round trip so any
// drift in the JSON contract fails the suite immediately.
BOOST_AUTO_TEST_CASE( NetChainClassesJsonRoundTrip )
{
    NET_SETTINGS source( nullptr, "" );
 
    source.SetNetChainClass( wxS( "CHAIN_A" ), wxS( "Default" ) );
    source.SetNetChainClass( wxS( "CHAIN_B" ), wxS( "HighSpeed" ) );
    source.SetNetChainClass( wxS( "CHAIN_WITH_SPACES and: punctuation!" ), wxS( "Power" ) );
    source.SetNetChainClass( wxS( "Unicode_éèê" ), wxS( "RF_µwave" ) );
 
    BOOST_REQUIRE( source.Store() );
 
    // Round-trip through the text form so a renamed key, broken serializer, or broken
    // parser all surface as a test failure.  FormatAsString -> parse mirrors what
    // SaveToFile / LoadFromFile do on disk.
    std::string serialized = source.FormatAsString();
    nlohmann::json reparsed = nlohmann::json::parse( serialized );
 
    BOOST_REQUIRE( reparsed.contains( "net_chain_classes" ) );
    BOOST_REQUIRE( reparsed["net_chain_classes"].is_object() );
 
    NET_SETTINGS sink( nullptr, "" );
 
    // Seed the sink with a stale entry so a no-op reader would still leave it behind;
    // the read lambda must clear() before applying the loaded map.
    sink.SetNetChainClass( wxS( "STALE_CHAIN" ), wxS( "Default" ) );
 
    JSON_SETTINGS_INTERNALS reparsedInternals;
    static_cast<nlohmann::json&>( reparsedInternals ) = reparsed;
    sink.Internals()->CloneFrom( reparsedInternals );
    sink.Load();
 
    BOOST_CHECK( sink.GetNetChainClasses().size() == source.GetNetChainClasses().size() );
    BOOST_CHECK( sink.GetNetChainClasses() == source.GetNetChainClasses() );
    BOOST_CHECK( sink.GetNetChainClass( wxS( "CHAIN_A" ) ) == wxS( "Default" ) );
    BOOST_CHECK( sink.GetNetChainClass( wxS( "CHAIN_B" ) ) == wxS( "HighSpeed" ) );
    BOOST_CHECK( sink.GetNetChainClass( wxS( "CHAIN_WITH_SPACES and: punctuation!" ) )
                 == wxS( "Power" ) );
    BOOST_CHECK( sink.GetNetChainClass( wxS( "Unicode_éèê" ) ) == wxS( "RF_µwave" ) );
    BOOST_CHECK( sink.GetNetChainClass( wxS( "STALE_CHAIN" ) ).IsEmpty() );
    BOOST_CHECK( source == sink );
}
 
 
// An empty m_netChainClasses must serialize as an empty object (not be omitted, not be
// emitted as null) and round-trip back to an empty map without leaving stale entries.
BOOST_AUTO_TEST_CASE( NetChainClassesJsonRoundTripEmpty )
{
    NET_SETTINGS source( nullptr, "" );
 
    BOOST_REQUIRE( source.Store() );
 
    std::string serialized = source.FormatAsString();
    nlohmann::json reparsed = nlohmann::json::parse( serialized );
 
    BOOST_REQUIRE( reparsed.contains( "net_chain_classes" ) );
    BOOST_CHECK( reparsed["net_chain_classes"].is_object() );
    BOOST_CHECK( reparsed["net_chain_classes"].empty() );
 
    NET_SETTINGS sink( nullptr, "" );
 
    sink.SetNetChainClass( wxS( "STALE" ), wxS( "Default" ) );
 
    JSON_SETTINGS_INTERNALS reparsedInternals;
    static_cast<nlohmann::json&>( reparsedInternals ) = reparsed;
    sink.Internals()->CloneFrom( reparsedInternals );
    sink.Load();
 
    BOOST_CHECK( sink.GetNetChainClasses().empty() );
}
 
 
// Empty class strings are how chain assignments are cleared (SetNetChainClass with "")
// and the writer must not emit them.  An attacker-supplied or hand-edited JSON file
// that contains an empty string value must also be ignored on load, matching the
// in-memory clear semantics tested in ChainClassValueAndClearAffectEquality.
BOOST_AUTO_TEST_CASE( NetChainClassesJsonDropsEmptyValues )
{
    NET_SETTINGS source( nullptr, "" );
 
    source.SetNetChainClass( wxS( "KEEP" ), wxS( "Default" ) );
 
    BOOST_REQUIRE( source.Store() );
 
    nlohmann::json reparsed = nlohmann::json::parse( source.FormatAsString() );
 
    BOOST_REQUIRE( reparsed.contains( "net_chain_classes" ) );
    BOOST_REQUIRE_EQUAL( reparsed["net_chain_classes"].size(), 1u );
 
    // Inject a hand-crafted empty-value entry to confirm the reader rejects it.
    reparsed["net_chain_classes"]["EMPTY"] = "";
 
    NET_SETTINGS sink( nullptr, "" );
 
    JSON_SETTINGS_INTERNALS reparsedInternals;
    static_cast<nlohmann::json&>( reparsedInternals ) = reparsed;
    sink.Internals()->CloneFrom( reparsedInternals );
    sink.Load();
 
    BOOST_CHECK_EQUAL( sink.GetNetChainClasses().size(), 1u );
    BOOST_CHECK( sink.GetNetChainClass( wxS( "KEEP" ) ) == wxS( "Default" ) );
    BOOST_CHECK( sink.GetNetChainClass( wxS( "EMPTY" ) ).IsEmpty() );
}
 
 
// Without m_netChainNetClasses in operator==, assigning a netclass to a chain reported "no
// change" and the project was never written, so the assignment vanished on reopen.
BOOST_AUTO_TEST_CASE( ChainNetclassAssignmentAffectsEquality )
{
    NET_SETTINGS a( nullptr, "" );
    NET_SETTINGS b( nullptr, "" );
 
    a.SetNetChainNetClass( wxS( "CHAIN_A" ), wxS( "HighSpeed" ) );
 
    BOOST_CHECK( a != b );
 
    b.SetNetChainNetClass( wxS( "CHAIN_A" ), wxS( "Power" ) );
 
    BOOST_CHECK( a != b );
 
    b.SetNetChainNetClass( wxS( "CHAIN_A" ), wxS( "HighSpeed" ) );
 
    BOOST_CHECK( a == b );
 
    a.SetNetChainNetClass( wxS( "CHAIN_A" ), wxString() );
 
    BOOST_CHECK( a != b );
 
    b.ClearNetChainNetClasses();
 
    BOOST_CHECK( a == b );
}
 
 
// Persisted-state regression guard for the "net_chain_netclasses" JSON key.  This map is the
// only record of a chain's netclass on the board side, so a renamed key or broken lambda
// presents as the netclass resolving until the next reload and then silently reverting.
BOOST_AUTO_TEST_CASE( ChainNetclassesJsonRoundTrip )
{
    NET_SETTINGS source( nullptr, "" );
 
    source.SetNetChainNetClass( wxS( "CHAIN_A" ), wxS( "HighSpeed" ) );
    source.SetNetChainNetClass( wxS( "Unicode_éèê" ), wxS( "RF_µwave" ) );
 
    BOOST_REQUIRE( source.Store() );
 
    nlohmann::json reparsed = nlohmann::json::parse( source.FormatAsString() );
 
    BOOST_REQUIRE( reparsed.contains( "net_chain_netclasses" ) );
    BOOST_REQUIRE( reparsed["net_chain_netclasses"].is_object() );
 
    // A hand-crafted empty value must be dropped, matching SetNetChainNetClass's clear
    // semantics.
    reparsed["net_chain_netclasses"]["EMPTY"] = "";
 
    NET_SETTINGS sink( nullptr, "" );
 
    // A no-op reader would leave this behind; the read lambda must clear() first.
    sink.SetNetChainNetClass( wxS( "STALE_CHAIN" ), wxS( "Default" ) );
 
    JSON_SETTINGS_INTERNALS reparsedInternals;
    static_cast<nlohmann::json&>( reparsedInternals ) = reparsed;
    sink.Internals()->CloneFrom( reparsedInternals );
    sink.Load();
 
    BOOST_CHECK( sink.GetNetChainNetClasses() == source.GetNetChainNetClasses() );
    BOOST_CHECK( sink.GetNetChainNetClass( wxS( "CHAIN_A" ) ) == wxS( "HighSpeed" ) );
    BOOST_CHECK( sink.GetNetChainNetClass( wxS( "Unicode_éèê" ) ) == wxS( "RF_µwave" ) );
    BOOST_CHECK( sink.GetNetChainNetClass( wxS( "EMPTY" ) ).IsEmpty() );
    BOOST_CHECK( sink.GetNetChainNetClass( wxS( "STALE_CHAIN" ) ).IsEmpty() );
    BOOST_CHECK( source == sink );
}
 
 
// A disk-backed stand-in for the project file.  The merge that decides whether a removed key
// survives runs against the parent's on-disk baseline, which the FormatAsString round trips
// above never populate.
class TEST_PROJECT_SETTINGS : public JSON_SETTINGS
{
public:
    TEST_PROJECT_SETTINGS( const wxString& aFilename ) :
            JSON_SETTINGS( aFilename, SETTINGS_LOC::NONE, 0, true, true, true )
    {
    }
};
 
 
// NESTED_SETTINGS flushes into the parent with a merge, which adds and updates but never deletes.
// Without SetClearUnknownKeys() on the chain maps, a removed or renamed chain stays in the project
// file and reappears with its old netclass on the next reload.
BOOST_AUTO_TEST_CASE( RemovedChainNetclassIsDroppedFromProjectFile )
{
    wxFileName tempDir( wxStandardPaths::Get().GetTempDir(), wxEmptyString );
    wxString   tempName = wxString::Format( wxT( "kicad_qa_25065_%ld" ), wxGetProcessId() );
    tempDir.AppendDir( tempName );
 
    BOOST_REQUIRE( wxFileName::Mkdir( tempDir.GetPath(), wxS_DIR_DEFAULT, wxPATH_MKDIR_FULL ) );
 
    wxFileName tempFile( tempDir.GetPath(), wxT( "project.json" ) );
 
    {
        TEST_PROJECT_SETTINGS parent( tempFile.GetFullPath() );
        parent.SetManager( reinterpret_cast<SETTINGS_MANAGER*>( 1 ) );
 
        NET_SETTINGS netSettings( &parent, "net_settings" );
 
        netSettings.SetNetChainClass( wxS( "CHAIN_A" ), wxS( "DDR" ) );
        netSettings.SetNetChainClass( wxS( "CHAIN_B" ), wxS( "DDR" ) );
        netSettings.SetNetChainNetClass( wxS( "CHAIN_A" ), wxS( "HighSpeed" ) );
        netSettings.SetNetChainNetClass( wxS( "CHAIN_B" ), wxS( "Power" ) );
 
        parent.ReleaseNestedSettings( &netSettings );
 
        BOOST_REQUIRE( parent.SaveToFile( wxEmptyString, true ) );
    }
 
    // Reopening from disk is what gives the parent its baseline; without it the merge has nothing
    // to resurrect and the defect stays invisible.
    {
        TEST_PROJECT_SETTINGS parent( tempFile.GetFullPath() );
        parent.SetManager( reinterpret_cast<SETTINGS_MANAGER*>( 1 ) );
 
        BOOST_REQUIRE( parent.LoadFromFile() );
 
        NET_SETTINGS netSettings( &parent, "net_settings" );
 
        BOOST_REQUIRE( netSettings.LoadFromFile() );
        BOOST_REQUIRE_EQUAL( netSettings.GetNetChainNetClasses().size(), 2u );
        BOOST_REQUIRE_EQUAL( netSettings.GetNetChainClasses().size(), 2u );
 
        netSettings.SetNetChainNetClass( wxS( "CHAIN_B" ), wxString() );
        netSettings.SetNetChainClass( wxS( "CHAIN_B" ), wxString() );
 
        parent.ReleaseNestedSettings( &netSettings );
 
        // Deliberately unchecked: resurrected keys make the payload match the bytes already on
        // disk, so the no-op-rewrite guard declines the write.  Assert on the file instead.
        parent.SaveToFile();
    }
 
    std::ifstream in( tempFile.GetFullPath().fn_str(), std::ios::in | std::ios::binary );
    std::string   contents( ( std::istreambuf_iterator<char>( in ) ),
                            std::istreambuf_iterator<char>() );
 
    nlohmann::json onDisk = nlohmann::json::parse( contents );
 
    BOOST_REQUIRE( onDisk.contains( "net_settings" ) );
 
    const nlohmann::json& netChainNetClasses = onDisk["net_settings"]["net_chain_netclasses"];
    const nlohmann::json& netChainClasses = onDisk["net_settings"]["net_chain_classes"];
 
    BOOST_CHECK( netChainNetClasses.contains( "CHAIN_A" ) );
    BOOST_CHECK( !netChainNetClasses.contains( "CHAIN_B" ) );
    BOOST_CHECK( netChainClasses.contains( "CHAIN_A" ) );
    BOOST_CHECK( !netChainClasses.contains( "CHAIN_B" ) );
 
    wxRemoveFile( tempFile.GetFullPath() );
    wxFileName::Rmdir( tempDir.GetPath() );
}
 
 
// In-place mutations to the default netclass (the UI's normal edit path goes
// GetDefaultNetclass()->SetClearance(...) and does not swap the shared_ptr)
// must propagate to operator==, otherwise editing default clearance / track
// width during a session was silently dropped on close.
BOOST_AUTO_TEST_CASE( DefaultNetclassInPlaceEditAffectsEquality )
{
    NET_SETTINGS a( nullptr, "" );
    NET_SETTINGS b( nullptr, "" );
 
    BOOST_CHECK( a == b );
 
    // Use a value distinct from DEFAULT_CLEARANCE so the SetClearance call is a
    // real change.
    a.GetDefaultNetclass()->SetClearance( 350000 );
 
    BOOST_CHECK( a != b );
 
    b.GetDefaultNetclass()->SetClearance( 350000 );
 
    BOOST_CHECK( a == b );
 
    a.GetDefaultNetclass()->SetTrackWidth( 254000 );
 
    BOOST_CHECK( a != b );
}
 
 
// Replacing the default netclass shared_ptr entirely (the persistence-layer
// load path) must also flip equality.
BOOST_AUTO_TEST_CASE( DefaultNetclassReplacementAffectsEquality )
{
    NET_SETTINGS a( nullptr, "" );
    NET_SETTINGS b( nullptr, "" );
 
    std::shared_ptr<NETCLASS> replacement = std::make_shared<NETCLASS>( NETCLASS::Default, true );
    replacement->SetTrackWidth( 300000 );
 
    a.SetDefaultNetclass( replacement );
 
    BOOST_CHECK( a != b );
}
 
 
// A named netclass parameter edit (in-place via the map's shared_ptr) must
// flip equality.  Without the deep field comparison in operator==, the std::equal
// over m_netClasses would only check pointer identity and miss the edit.
BOOST_AUTO_TEST_CASE( NamedNetclassParameterEditAffectsEquality )
{
    NET_SETTINGS a( nullptr, "" );
    NET_SETTINGS b( nullptr, "" );
 
    std::shared_ptr<NETCLASS> highSpeedA = std::make_shared<NETCLASS>( wxS( "HighSpeed" ), false );
    std::shared_ptr<NETCLASS> highSpeedB = std::make_shared<NETCLASS>( wxS( "HighSpeed" ), false );
 
    a.SetNetclass( wxS( "HighSpeed" ), highSpeedA );
    b.SetNetclass( wxS( "HighSpeed" ), highSpeedB );
 
    BOOST_CHECK( a == b );
 
    highSpeedA->SetClearance( 100000 );
 
    BOOST_CHECK( a != b );
 
    highSpeedB->SetClearance( 100000 );
 
    BOOST_CHECK( a == b );
}
 
 
// CopyFrom should produce an instance that compares equal to the source under
// the new content-aware operator==, regardless of underlying shared_ptr
// addresses.  Deep verification: spot-check fields that exercise the JSON
// round-trip used by CopyFrom.
BOOST_AUTO_TEST_CASE( CopyFromProducesEqualInstance )
{
    NET_SETTINGS source( nullptr, "" );
 
    source.GetDefaultNetclass()->SetClearance( 250000 );
    source.GetDefaultNetclass()->SetTrackWidth( 200000 );
    source.GetDefaultNetclass()->SetDescription( wxS( "Project default" ) );
 
    std::shared_ptr<NETCLASS> highSpeed = std::make_shared<NETCLASS>( wxS( "HighSpeed" ), false );
    highSpeed->SetClearance( 150000 );
    highSpeed->SetTrackWidth( 127000 );
    std::map<wxString, std::shared_ptr<NETCLASS>> classes;
    classes[wxS( "HighSpeed" )] = highSpeed;
    source.SetNetclasses( classes );
 
    source.SetNetclassPatternAssignment( wxS( "DDR_*" ), wxS( "HighSpeed" ) );
    source.SetNetclassLabelAssignment( wxS( "EXACT_NET" ), { wxS( "HighSpeed" ) } );
    source.SetNetChainClass( wxS( "DDR_BUS" ), wxS( "HighSpeed" ) );
 
    NET_SETTINGS sink( nullptr, "" );
    sink.CopyFrom( source );
 
    BOOST_CHECK( source == sink );
 
    // Verify the deep copy detached pointer ownership: editing source after
    // CopyFrom must not affect sink.
    source.GetDefaultNetclass()->SetClearance( 999999 );
 
    BOOST_CHECK( source != sink );
    BOOST_CHECK_EQUAL( sink.GetDefaultNetclass()->GetClearance(), 250000 );
}
 
 
// CopyFrom must drop pre-existing state in the sink rather than merging --
// otherwise stale netclasses / pattern assignments from a previous load
// would leak through.
BOOST_AUTO_TEST_CASE( CopyFromDropsPreExistingSinkState )
{
    NET_SETTINGS source( nullptr, "" );
    source.GetDefaultNetclass()->SetClearance( 100000 );
 
    NET_SETTINGS sink( nullptr, "" );
    sink.GetDefaultNetclass()->SetClearance( 999999 );
 
    std::shared_ptr<NETCLASS> stale = std::make_shared<NETCLASS>( wxS( "StaleClass" ), false );
    std::map<wxString, std::shared_ptr<NETCLASS>> staleClasses;
    staleClasses[wxS( "StaleClass" )] = stale;
    sink.SetNetclasses( staleClasses );
 
    sink.SetNetclassPatternAssignment( wxS( "STALE_*" ), wxS( "StaleClass" ) );
    sink.SetNetChainClass( wxS( "STALE_CHAIN" ), wxS( "StaleClass" ) );
 
    sink.CopyFrom( source );
 
    BOOST_CHECK( source == sink );
    BOOST_CHECK_EQUAL( sink.GetDefaultNetclass()->GetClearance(), 100000 );
    BOOST_CHECK( sink.GetNetclasses().empty() );
    BOOST_CHECK( sink.GetNetclassPatternAssignments().empty() );
    BOOST_CHECK( sink.GetNetChainClasses().empty() );
}
 
 
// Derived caches in the sink must be dropped, otherwise GetEffectiveNetClass
// can return a pre-CopyFrom cached result that doesn't match the new source.
BOOST_AUTO_TEST_CASE( CopyFromClearsStaleDerivedCaches )
{
    NET_SETTINGS sink( nullptr, "" );
 
    std::shared_ptr<NETCLASS> stalePower = std::make_shared<NETCLASS>( wxS( "StalePower" ), false );
    std::map<wxString, std::shared_ptr<NETCLASS>> staleClasses;
    staleClasses[wxS( "StalePower" )] = stalePower;
    sink.SetNetclasses( staleClasses );
    sink.SetNetclassPatternAssignment( wxS( "VCC_*" ), wxS( "StalePower" ) );
 
    // Warm the effective-class cache for a net that resolves via the stale pattern.
    BOOST_REQUIRE( sink.GetEffectiveNetClass( wxS( "VCC_3V3" ) ) != nullptr );
    BOOST_REQUIRE( sink.HasEffectiveNetClass( wxS( "VCC_3V3" ) ) );
 
    NET_SETTINGS source( nullptr, "" );
 
    sink.CopyFrom( source );
 
    // The stale-pattern cache entry must NOT survive; the post-CopyFrom effective
    // class for VCC_3V3 should resolve to the default since the source has no
    // patterns or named classes.
    BOOST_CHECK( !sink.HasEffectiveNetClass( wxS( "VCC_3V3" ) ) );
}
 
 
// Chain-derived pattern assignments are not persisted and must be cleared on
// CopyFrom -- otherwise the sink's prior chain mappings leak past the swap.
BOOST_AUTO_TEST_CASE( CopyFromClearsStaleChainDerivedPatterns )
{
    NET_SETTINGS sink( nullptr, "" );
    std::shared_ptr<NETCLASS> highSpeed = std::make_shared<NETCLASS>( wxS( "HighSpeed" ), false );
    std::map<wxString, std::shared_ptr<NETCLASS>> classes;
    classes[wxS( "HighSpeed" )] = highSpeed;
    sink.SetNetclasses( classes );
    sink.SetChainPatternAssignment( NET_CHAIN_SOURCE::SCHEMATIC, wxS( "DDR_DQ0" ), wxS( "HighSpeed" ) );
 
    BOOST_REQUIRE( resolvesToNetclass( sink, wxS( "DDR_DQ0" ), wxS( "HighSpeed" ) ) );
 
    NET_SETTINGS source( nullptr, "" );
 
    sink.CopyFrom( source );
 
    BOOST_CHECK( !resolvesToNetclass( sink, wxS( "DDR_DQ0" ), wxS( "HighSpeed" ) ) );
}
 
 
// Self-assignment guard.
BOOST_AUTO_TEST_CASE( CopyFromSelfIsNoop )
{
    NET_SETTINGS settings( nullptr, "" );
    settings.GetDefaultNetclass()->SetClearance( 200000 );
 
    settings.CopyFrom( settings );
 
    BOOST_CHECK_EQUAL( settings.GetDefaultNetclass()->GetClearance(), 200000 );
}
 
 
// Regression guard for issue 24823: a sheet rename must retarget netclass pattern and net color
// assignments from the old sheet path to the new one.
BOOST_AUTO_TEST_CASE( RenameNetPathPrefixRetargetsAssignments )
{
    NET_SETTINGS settings( nullptr, "" );
 
    std::shared_ptr<NETCLASS>                     highSpeed = std::make_shared<NETCLASS>( wxS( "HighSpeed" ), false );
    std::map<wxString, std::shared_ptr<NETCLASS>> classes;
    classes[wxS( "HighSpeed" )] = highSpeed;
    settings.SetNetclasses( classes );
 
    settings.SetNetclassPatternAssignment( wxS( "/Sheet1/CLK" ), wxS( "HighSpeed" ) );
    settings.SetNetclassPatternAssignment( wxS( "/Sheet1/DATA*" ), wxS( "HighSpeed" ) );
    settings.SetNetclassPatternAssignment( wxS( "/Sheet1/Sub/EN" ), wxS( "HighSpeed" ) );
    settings.SetNetclassPatternAssignment( wxS( "/Other/RST" ), wxS( "HighSpeed" ) );
    settings.SetNetclassPatternAssignment( wxS( "/Sheet10/BUS" ), wxS( "HighSpeed" ) );
    settings.SetNetColorAssignment( wxS( "/Sheet1/CLK" ), KIGFX::COLOR4D( 1.0, 0.0, 0.0, 1.0 ) );
 
    BOOST_REQUIRE( resolvesToNetclass( settings, wxS( "/Sheet1/CLK" ), wxS( "HighSpeed" ) ) );
    BOOST_REQUIRE( !resolvesToNetclass( settings, wxS( "/Sheet2/CLK" ), wxS( "HighSpeed" ) ) );
 
    BOOST_CHECK( settings.RenameNetPathPrefix( wxS( "/Sheet1/" ), wxS( "/Sheet2/" ) ) );
 
    // Nets under the renamed sheet now resolve at the new path, including the wildcard and the
    // deeper net, and no longer at the old one.
    BOOST_CHECK( resolvesToNetclass( settings, wxS( "/Sheet2/CLK" ), wxS( "HighSpeed" ) ) );
    BOOST_CHECK( resolvesToNetclass( settings, wxS( "/Sheet2/DATA0" ), wxS( "HighSpeed" ) ) );
    BOOST_CHECK( resolvesToNetclass( settings, wxS( "/Sheet2/Sub/EN" ), wxS( "HighSpeed" ) ) );
    BOOST_CHECK( !resolvesToNetclass( settings, wxS( "/Sheet1/CLK" ), wxS( "HighSpeed" ) ) );
 
    // Unrelated and same-prefix-sibling patterns are untouched.
    BOOST_CHECK( resolvesToNetclass( settings, wxS( "/Other/RST" ), wxS( "HighSpeed" ) ) );
    BOOST_CHECK( resolvesToNetclass( settings, wxS( "/Sheet10/BUS" ), wxS( "HighSpeed" ) ) );
 
    const std::map<wxString, KIGFX::COLOR4D>& colors = settings.GetNetColorAssignments();
    BOOST_CHECK( colors.count( wxS( "/Sheet2/CLK" ) ) == 1 );
    BOOST_CHECK( colors.count( wxS( "/Sheet1/CLK" ) ) == 0 );
 
    BOOST_CHECK( !settings.RenameNetPathPrefix( wxS( "/Nope/" ), wxS( "/Nada/" ) ) );
}
 
 
BOOST_AUTO_TEST_SUITE_END()