147 lines
3.7 KiB
C++
147 lines
3.7 KiB
C++
/*
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IterSource(Test) - how to build an opaque iterator-based data source
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Copyright (C) Lumiera.org
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2010, Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* *****************************************************/
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#include "lib/test/run.hpp"
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#include "lib/util.hpp"
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#include "lib/iter-source.hpp"
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#include <boost/lexical_cast.hpp>
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#include <iostream>
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#include <list>
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namespace lib {
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namespace test{
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using ::Test;
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using boost::lexical_cast;
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using util::isnil;
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using std::list;
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using std::cout;
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using std::endl;
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namespace { // Subject of test
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uint NUM_ELMS = 10;
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/**
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* Explicit implementation of the IterSource interface (test dummy)
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*/
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class TestSource
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: public IterSource<char*>
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{
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};
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/** test dummy, simply wrapping an STL container
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* and exposing a range as Lumiera Forward Iterator
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*/
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struct WrappedList
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{
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list<int> data_;
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WrappedList(uint num)
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{
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while (num)
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data_.push_back(num--);
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}
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typedef list<int>::iterator sourceIter;
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typedef RangeIter<sourceIter> iterator;
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typedef list<int>::const_iterator const_sourceIter;
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typedef RangeIter<const_sourceIter> const_iterator;
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iterator begin() { return iterator(data_.begin(),data_.end()); }
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iterator end() { return iterator(); }
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const_iterator begin() const { return const_iterator(data_.begin(),data_.end()); }
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const_iterator end() const { return const_iterator(); }
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};
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} // (END) impl test dummy containers
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/******************************************************************
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* @test create some (opaque) data sources,
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* and then pull the data out by iteration.
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* Demonstrates simple usage of the IterSource inteface
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*
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*/
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class IterSource_test : public Test
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{
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typedef IterSource<int>::iterator IntIter;
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typedef IterSource<char*>::iterator StrIter;
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virtual void
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run (Arg arg)
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{
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if (0 < arg.size()) NUM_ELMS = lexical_cast<uint> (arg[0]);
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// build the test data sources
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WrappedList customList(NUM_ELMS);
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TestSource dedicatedSource(NUM_ELMS);
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IntIter iii (eachEntry (customList));
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StrIter cii (IterSource<char*>::build(dedicatedSource));
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ASSERT (!isnil (iii));
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ASSERT (!isnil (cii));
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pullOut (iii);
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pullOut (cii);
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ASSERT (!iii);
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ASSERT (!cii);
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}
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template<class IT>
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void
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pullOut (IT const& ii)
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{
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for (IT iter(ii) ; iter; ++iter )
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cout << "::" << *iter;
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cout << endl;
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}
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};
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LAUNCHER (IterSource_test, "unit common");
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}} // namespace lib::test
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