root/library/tests/shared_ptr_test.cpp @ 589

#include "shared_ptr.h"
#include "UnitTest++.h"
#include <stdexcept>
#include <vector>

class Foo {
private:
        int x;

public:
        Foo ( int x ) : x ( x ) { }

        int get_x() const {
                return x;
        }

        void set_x ( int nx ) {
                x = nx;
        }
};

typedef std::vector<bdm::shared_ptr<Foo> > TFooVector;

typedef std::vector<bdm::shared_ptr<const Foo> > TConstFooVector;

TEST ( test_shared_ptr ) {
        TFooVector v;

        bdm::shared_ptr<Foo> zero;
        CHECK_EQUAL ( 0l, zero.use_count() );
        bdm::shared_ptr<Foo> z2 ( zero );
        CHECK_EQUAL ( 0l, z2.use_count() );

        bdm::shared_ptr<Foo> one ( new Foo ( 1 ) );
        v.push_back ( one );
        CHECK ( !one.unique() );

        v.push_back ( one );
        v.push_back ( bdm::shared_ptr<Foo> ( new Foo ( 2 ) ) );
        CHECK_EQUAL ( static_cast<TFooVector::size_type> ( 3 ), v.size() );

        CHECK ( v[0] == v[1] );
        CHECK ( v[1] != v[2] );

        Foo c ( * ( v[0] ) );
        CHECK_EQUAL ( 1, c.get_x() );

        Foo *p = v[1].get();
        CHECK_EQUAL ( 1, p->get_x() );
        p->set_x ( 12 );
        CHECK_EQUAL ( 12, one->get_x() );

        CHECK ( v[2].unique() );
        CHECK_EQUAL ( 2, v[2]->get_x() );
}

TEST ( test_shared_ptr_const ) {
        TConstFooVector v;

        bdm::shared_ptr<const Foo> zero;
        CHECK_EQUAL ( 0l, zero.use_count() );
        bdm::shared_ptr<const Foo> z2 ( zero );
        CHECK_EQUAL ( 0l, z2.use_count() );

        bdm::shared_ptr<const Foo> one ( new Foo ( 1 ) );
        v.push_back ( one );
        CHECK ( !one.unique() );

        v.push_back ( one );
        v.push_back ( bdm::shared_ptr<const Foo> ( new Foo ( 2 ) ) );
        CHECK_EQUAL ( static_cast<TConstFooVector::size_type> ( 3 ), v.size() );

        CHECK ( v[0] == v[1] );
        CHECK ( v[1] != v[2] );

        Foo c ( * ( v[0] ) );
        CHECK_EQUAL ( 1, c.get_x() );

        const Foo *p = v[1].get();
        CHECK_EQUAL ( 1, p->get_x() );

        CHECK ( v[2].unique() );
        CHECK_EQUAL ( 2, v[2]->get_x() );

        bdm::shared_ptr<Foo> non_const;
        bdm::shared_ptr<const Foo> another ( non_const );
        CHECK ( !non_const.unique() );
}

// tested runtime check is only in debug version
#ifndef NDEBUG
TEST ( test_shared_ptr_error ) {
        bdm::shared_ptr<Foo> empty;
        try {
                Foo x(*empty);
                CHECK ( false );
        } catch ( std::runtime_error &exc ) {
                CHECK ( exc.what() );
        }
}
#endif