Ichthyostega
4f28e8ad6c
- use a Draw with only a few values - but with an origin within the value range - verify stepping and distributions for various probabilities
411 lines
12 KiB
C++
411 lines
12 KiB
C++
/*
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RandomDraw(Test) - verify the component builder for random selected values
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Copyright (C) Lumiera.org
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2023, 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
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the 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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/** @file random-draw-test.cpp
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** unit test \ref RandomDraw_test
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*/
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#include "lib/test/run.hpp"
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//#include "lib/test/test-helper.hpp"
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#include "lib/random-draw.hpp"
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#include "lib/time/timevalue.hpp"
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#include "lib/test/diagnostic-output.hpp"////////////////////TODO
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#include "lib/format-string.hpp"
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//#include "lib/util.hpp"
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//#include <cstdlib>
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#include <array>
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namespace lib {
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namespace test{
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// using util::isSameObject;
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// using std::rand;
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using util::_Fmt;
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using lib::time::FSecs;
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using lib::time::TimeVar;
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// namespace error = lumiera::error;
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// using error::LUMIERA_ERROR_FATAL;
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// using error::LUMIERA_ERROR_STATE;
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namespace {
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// const Literal THE_END = "all dead and hero got the girl";
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struct SymmetricFive
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: function<Limited<int, 2,-2, 0>(size_t)>
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{
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static size_t defaultSrc (size_t hash) { return hash; }
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/**
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* @internal helper to expose the signature `size_t(size_t)`
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* by wrapping a given lambda or functor.
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*/
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template<class SIG>
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struct Adaptor
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{
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static_assert (not sizeof(SIG), "Unable to adapt given functor.");
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};
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template<typename RES>
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struct Adaptor<RES(size_t)>
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{
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template<typename FUN>
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static decltype(auto)
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build (FUN&& fun)
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{
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return std::forward<FUN>(fun);
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}
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};
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template<typename RES>
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struct Adaptor<RES(void)>
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{
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template<typename FUN>
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static auto
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build (FUN&& fun)
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{
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return [functor=std::forward<FUN>(fun)]
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(size_t)
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{
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return functor();
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};
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}
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};
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};
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}
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using Draw = RandomDraw<SymmetricFive>;
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/***********************************************************************************//**
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* @test Verify a flexible builder for random-value generators; using a config template,
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* these can be outfitted to use a suitable source of randomness and to produce
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* values from a desired target type and limited range.
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* - TODO
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* @see result.hpp
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* @see lib::ThreadJoinable usage example
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*/
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class RandomDraw_test
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: public Test
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{
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void
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run (Arg)
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{
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simpleUse();
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verify_policy();
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verify_numerics();
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verify_buildProfile();
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verify_dynamicChange();
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}
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/** @test TODO demonstrate a basic usage scenario
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* @todo WIP 11/23 ✔ define ⟶ 🔁 implement
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*/
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void
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simpleUse()
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{
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auto draw = Draw().probability(0.5);
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//SHOW_EXPR (int(draw(0) ));
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//SHOW_EXPR (int(draw(16 )));
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//SHOW_EXPR (int(draw(31 )));
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//SHOW_EXPR (int(draw(32 )));
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//SHOW_EXPR (int(draw(39 )));
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//SHOW_EXPR (int(draw(40 )));
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//SHOW_EXPR (int(draw(47 )));
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//SHOW_EXPR (int(draw(48 )));
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//SHOW_EXPR (int(draw(55 )));
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//SHOW_EXPR (int(draw(56 )));
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//SHOW_EXPR (int(draw(63 )));
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//SHOW_EXPR (int(draw(64 )));
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//SHOW_EXPR (int(draw(65 )));
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//SHOW_EXPR (int(draw(95 )));
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//SHOW_EXPR (int(draw(96 )));
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//SHOW_EXPR (int(draw(127)));
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//SHOW_EXPR (int(draw(128)));
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//SHOW_EXPR (int(draw(168)));
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//SHOW_EXPR (int(draw(256)));
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CHECK (draw( 0) == 0);
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CHECK (draw( 16) == 0);
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CHECK (draw( 32) == 1);
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CHECK (draw( 40) == 2);
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CHECK (draw( 48) == -2);
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CHECK (draw( 56) == -1);
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CHECK (draw( 64) == 0);
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CHECK (draw( 95) == 0);
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CHECK (draw( 96) == 1);
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CHECK (draw(127) == -1);
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CHECK (draw(128) == 0);
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CHECK (draw(168) == 2);
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CHECK (draw(256) == 0);
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}
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/** @test TODO verify configuration through policy template
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* @todo WIP 11/23 🔁 define ⟶ 🔁 implement
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*/
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void
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verify_policy()
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{
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auto d1 = RandomDraw<random_draw::LimitedRandomGenerate<5>>().probability(1.0);
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uint v1 = d1();
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CHECK (0 < v1 and v1 <=5);
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struct SpecialPolicy
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: function<Limited<char, 'Z','A'>(char,uint)>
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{
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static double defaultSrc (char b, uint off) { return fmod ((b-'A'+off)/double('Z'-'A'), 1.0); }
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};
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auto d2 = RandomDraw<SpecialPolicy>().probability(1.0);
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CHECK (d2('A', 2) == 'D');
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CHECK (d2('M',10) == 'X');
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CHECK (d2('Y', 0) == 'Z');
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CHECK (d2('Y',15) == 'P');
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}
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/** @test TODO verify random number transformations
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* - use a Draw instance with result values `[-2..0..+2]`
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* - values are evenly distributed within limits of quantisation
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* - the probability parameter controls the amount of neutral results
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* @todo WIP 11/23 🔁 define ⟶ ✔ implement
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*/
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void
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verify_numerics()
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{
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auto distribution = [](Draw const& draw)
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{
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using Arr = std::array<uint,5>;
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Arr step{0};
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Arr freq{0};
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for (uint i=0; i<128; ++i)
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{
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int res = draw(i);
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CHECK (-2 <= res and res <= +2);
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int idx = res+2;
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freq[idx] += 1;
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if (res and not step[idx])
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step[idx] = i;
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}
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_Fmt line{"val:%+d (%02d|%5.2f%%)\n"};
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string report;
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for (int idx=0; idx<5; ++idx)
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{
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report += line % (idx-2) % step[idx] % (100.0*freq[idx]/128);
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}
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return report;
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};
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auto draw = Draw();
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string report{"+++| --empty-- \n"};
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CHECK (draw( 0) == 0);
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CHECK (draw( 32) == 0);
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CHECK (draw( 96) == 0);
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report += distribution(draw);
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CHECK (report ==
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"+++| --empty-- \n"
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"val:-2 (00| 0.00%)\n"
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"val:-1 (00| 0.00%)\n"
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"val:+0 (00|100.00%)\n"
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"val:+1 (00| 0.00%)\n"
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"val:+2 (00| 0.00%)\n"_expect);
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draw.probability(1.0);
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CHECK (draw( 0) == +1);
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CHECK (draw( 15) == +1);
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CHECK (draw( 16) == +2);
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CHECK (draw( 31) == +2);
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CHECK (draw( 32) == -2);
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CHECK (draw( 47) == -2);
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CHECK (draw( 48) == -1);
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CHECK (draw( 63) == -1);
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CHECK (draw( 64) == +1);
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CHECK (draw( 96) == -2);
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report = "+++| p ≔ 1.0 \n";
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report += distribution(draw);
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CHECK (report ==
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"+++| p ≔ 1.0 \n"
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"val:-2 (32|25.00%)\n"
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"val:-1 (48|25.00%)\n"
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"val:+0 (00| 0.00%)\n"
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"val:+1 (01|25.00%)\n"
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"val:+2 (16|25.00%)\n"_expect);
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draw.probability(0.99);
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CHECK (draw( 0) == 0);
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CHECK (draw( 1) == +1);
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CHECK (draw( 16) == +1);
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CHECK (draw( 17) == +2);
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CHECK (draw( 32) == +2);
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CHECK (draw( 33) == -2);
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CHECK (draw( 48) == -2);
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CHECK (draw( 49) == -1);
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CHECK (draw( 63) == -1);
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CHECK (draw( 64) == 0);
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CHECK (draw( 65) == +1);
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CHECK (draw( 80) == +1); // 64+16
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CHECK (draw( 82) == +2); // 64+17
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CHECK (draw( 97) == -2); // 64+33
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CHECK (draw(352) == +2); // 64+32+256
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CHECK (draw(353) == -2); // 64+33+256
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report = "+++| p ≔ 0.99 \n";
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report += distribution(draw);
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CHECK (report ==
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"+++| p ≔ 0.99 \n"
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"val:-2 (33|25.00%)\n"
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"val:-1 (49|23.44%)\n"
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"val:+0 (00| 1.56%)\n"
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"val:+1 (01|25.00%)\n"
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"val:+2 (17|25.00%)\n"_expect);
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draw.probability(0.98);
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CHECK (draw( 0) == 0);
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CHECK (draw( 1) == 0);
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CHECK (draw( 2) == +1);
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CHECK (draw( 63) == -1);
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CHECK (draw( 64) == 0);
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CHECK (draw( 65) == 0);
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CHECK (draw( 66) == +1);
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report = "+++| p ≔ 0.98 \n";
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report += distribution(draw);
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CHECK (report ==
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"+++| p ≔ 0.98 \n"
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"val:-2 (33|25.00%)\n"
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"val:-1 (49|23.44%)\n"
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"val:+0 (00| 3.12%)\n"
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"val:+1 (02|23.44%)\n"
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"val:+2 (17|25.00%)\n"_expect);
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draw.probability(0.97);
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report = "+++| p ≔ 0.97 \n";
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report += distribution(draw);
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CHECK (report ==
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"+++| p ≔ 0.97 \n"
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"val:-2 (33|25.00%)\n"
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"val:-1 (49|23.44%)\n"
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"val:+0 (00| 3.12%)\n"
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"val:+1 (02|25.00%)\n"
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"val:+2 (18|23.44%)\n"_expect);
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draw.probability(0.75);
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report = "+++| p ≔ 0.75 \n";
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report += distribution(draw);
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CHECK (report ==
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"+++| p ≔ 0.75 \n"
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"val:-2 (40|18.75%)\n"
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"val:-1 (52|18.75%)\n"
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"val:+0 (00|25.00%)\n"
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"val:+1 (16|18.75%)\n"
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"val:+2 (28|18.75%)\n"_expect);
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draw.probability(0.5);
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report = "+++| p ≔ 0.50 \n";
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report += distribution(draw);
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CHECK (report ==
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"+++| p ≔ 0.50 \n"
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"val:-2 (48|12.50%)\n"
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"val:-1 (56|12.50%)\n"
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"val:+0 (00|50.00%)\n"
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"val:+1 (32|12.50%)\n"
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"val:+2 (40|12.50%)\n"_expect);
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draw.probability(0.2);
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report = "+++| p ≔ 0.20 \n";
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report += distribution(draw);
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CHECK (report ==
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"+++| p ≔ 0.20 \n"
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"val:-2 (58| 4.69%)\n"
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"val:-1 (61| 4.69%)\n"
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"val:+0 (00|81.25%)\n"
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"val:+1 (52| 4.69%)\n"
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"val:+2 (55| 4.69%)\n"_expect);
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draw.probability(0.1);
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report = "+++| p ≔ 0.10 \n";
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report += distribution(draw);
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CHECK (report ==
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"+++| p ≔ 0.10 \n"
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"val:-2 (61| 3.12%)\n"
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"val:-1 (63| 1.56%)\n"
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"val:+0 (00|90.62%)\n"
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"val:+1 (58| 3.12%)\n"
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"val:+2 (60| 1.56%)\n"_expect);
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}
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/** @test TODO verify the Builder-API to define the profile of result values.
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* @todo WIP 11/23 🔁 define ⟶ implement
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*/
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void
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verify_buildProfile()
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{
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UNIMPLEMENTED ("verify random number profile configuration");
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}
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/** @test TODO change the generation profile dynamically
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* @todo WIP 11/23 🔁 define ⟶ implement
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*/
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void
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verify_dynamicChange()
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{
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UNIMPLEMENTED ("change the generation profile dynamically");
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}
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};
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/** Register this test class... */
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LAUNCHER (RandomDraw_test, "unit common");
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}} // namespace lib::test
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