Ichthyostega
03b17c78da
This is a possible extension which frequently comes up again during the design of the Engine. Basically, the `TypeHandler` in the metadata-descriptor used by the `BufferProvder` could capture additional context-arguments, which are then later passed to an object instance embedded into the buffer. Yesterday I attempted to use this feature for a simple demonstration in `NodeBasic_test`, just to find out that passing additional constructor arguments to the capture fails with a confusing compilation error message. This failure could be traced down to the function binder; and what at first sight seemed to be a compiler error, turned out to be a quite logical limitation: When we »close« some objects of the constructor, but delay the construction itself, we'll have to store a copy in the constructor-λ. And this implies, that we'll have to change the types used for instantiation of the compiler, so that the construction-function can be invoked by passing references from the captured copy of the additional arguments. When naively passing those forwarded arguments into the std::bind()-call, the resulting functor will fail at instantiation, when the compiler attempts to generate the function-call `operator()` see: https://stackoverflow.com/q/30968573/444796
108 lines
3.2 KiB
C++
108 lines
3.2 KiB
C++
/*
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NodeBase(Test) - unit test to cover the render node base elements
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Copyright (C)
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2009, Hermann Vosseler <Ichthyostega@web.de>
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**Lumiera** is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2 of the License, or (at your
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option) any later version. See the file COPYING for further details.
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* *****************************************************************/
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/** @file node-base-test.cpp
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** Unit test \ref NodeBase_test covers elementary components of render nodes.
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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/meta/function.hpp"
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#include "steam/engine/proc-node.hpp"
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#include "steam/engine/turnout.hpp"
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#include "steam/engine/turnout-system.hpp"
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#include "steam/engine/feed-manifold.hpp"
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#include "steam/engine/diagnostic-buffer-provider.hpp"
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#include "steam/engine/buffhandle-attach.hpp"
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//#include "lib/format-cout.hpp"
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//#include "lib/util.hpp"
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//using std::string;
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namespace steam {
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namespace engine{
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namespace test {
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namespace { // Test fixture
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/**
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*/
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}
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/***************************************************************//**
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* @test basic render node properties and behaviour.
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*/
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class NodeBase_test : public Test
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{
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virtual void
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run (Arg)
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{
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seedRand();
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verify_TurnoutSystem();
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verify_FeedManifold();
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UNIMPLEMENTED ("build a simple render node and then activate it");
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}
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/** @test the TurnoutSystem as transient coordinator for node invocation
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*/
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void
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verify_TurnoutSystem()
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{
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Time nomTime{rani(10'000),0}; // drive test with a random »nominal Time« <10s with ms granularity
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TurnoutSystem invoker{nomTime}; // a time spec is mandatory, all further parameters are optional
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}
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/** @test the FeedManifold as adapter between Engine and processing library
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*/
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void
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verify_FeedManifold()
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{
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// some random numbers to test...
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long r1 = rani(100);
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// Type setup to build a suitable FeedManifold
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using Buffer = long;
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auto fun_singleOut = [&](Buffer* buff) { *buff = r1; };
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using M1 = FeedManifold<decltype(fun_singleOut)>;
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CHECK (not M1::hasInput());
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CHECK (not M1::hasParam());
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M1 m1{};
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CHECK (1 == m1.outBuff.array().size());
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CHECK (nullptr == m1.outArgs );
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// CHECK (m1.inArgs ); // does not compile because storage field is not provided
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// CHECK (m1.param );
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BufferProvider& provider = DiagnosticBufferProvider::build();
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BuffHandle buff = provider.lockBufferFor<long> (-55);
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CHECK (buff.isValid());
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CHECK (buff.accessAs<long>() == -55);
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m1.outBuff.createAt (0, buff);
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CHECK (m1.outBuff[0].isValid());
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CHECK (m1.outBuff[0].accessAs<long>() == -55);
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}
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};
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/** Register this test class... */
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LAUNCHER (NodeBase_test, "unit node");
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}}} // namespace steam::engine::test
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