Ichthyostega
5744244f73
this is at the core of the integration problem: how do we expose the ability of some opaque data structure to create a TreeMutator? The idea is - to use a marker/capability interface - to use template specialisation to fabricate an instance of that interface based on the given access point to the opaque data structure
243 lines
8.5 KiB
C++
243 lines
8.5 KiB
C++
/*
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DiffVirtualisedApplication(Test) - apply structural changes to unspecific private data structures
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Copyright (C) Lumiera.org
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2016, 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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#include "lib/test/run.hpp"
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#include "lib/format-util.hpp"
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#include "lib/diff/tree-diff-mutator-binding.hpp"
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#include "lib/iter-adapter-stl.hpp"
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#include "lib/time/timevalue.hpp"
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#include "lib/format-cout.hpp" //////////TODO necessary?
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#include "lib/format-string.hpp"
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//#include "lib/format-util.hpp"
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#include "lib/util.hpp"
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#include <string>
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#include <vector>
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#include <memory>
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using lib::iter_stl::snapshot;
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using util::isnil;
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using util::join;
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using util::_Fmt;
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using util::join;
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using std::unique_ptr;
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using std::string;
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using std::vector;
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using lib::time::Time;
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namespace lib {
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namespace diff{
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namespace test{
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namespace {//Test fixture....
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// define some GenNode elements
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// to act as templates within the concrete diff
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// NOTE: everything in this diff language is by-value
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const GenNode ATTRIB1("α", 1), // attribute α = 1
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ATTRIB2("β", int64_t(2)), // attribute α = 2L (int64_t)
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ATTRIB3("γ", 3.45), // attribute γ = 3.45 (double)
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TYPE_X("type", "ξ"), // a "magic" type attribute "Xi"
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TYPE_Z("type", "ζ"), //
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CHILD_A("a"), // unnamed string child node
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CHILD_B('b'), // unnamed char child node
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CHILD_T(Time(12,34,56,78)), // unnamed time value child
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SUB_NODE = MakeRec().genNode(), // empty anonymous node used to open a sub scope
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ATTRIB_NODE = MakeRec().genNode("δ"), // empty named node to be attached as attribute δ
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GAMMA_PI("γ", 3.14159265); // happens to have the same identity (ID) as ATTRIB3
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/**
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* opaque private data structure to apply the diff.
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* This class offers to build a binding for diff messages,
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* which basically maps its internal structures onto the
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* generic "object" scheme underlying the diff language.
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*/
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class Opaque
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{
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int alpha_ = -1;
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string beta_ = "NIL";
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double gamma_ = -1;
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unique_ptr<Opaque> delta_;
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vector<Opaque> nestedObj_;
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vector<string> nestedData_;
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public:
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Opaque() { }
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operator string() const
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{
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return _Fmt{"%s (α:%d β:%s γ:%7.5f δ:%s\n......|nested:%s\n......|data:%s\n )"}
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% idi::instanceTypeID (this)
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% alpha_
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% beta_
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% gamma_
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% delta_
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% join (nestedObj_, "\n......|")
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% join (nestedData_)
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;
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}
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void
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buildMutator (TreeMutator::Handle buff)
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{
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UNIMPLEMENTED("construct the concrete Binding, using the TreeMutator::Builder DSL");
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buff.create (
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TreeMutator::build()
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.attach (collection(nestedData_)
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));
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}
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};
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}//(End)Test fixture
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/***********************************************************************//**
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* @test Demonstration: apply a structural change to unspecified private
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* data structures, with the help of an [dynamic adapter](\ref TreeMutator)
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* - we use private data classes, defined here in the test fixture
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* to represent "just some" pre-existing data structure.
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* - we re-assign some attribute values
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* - we add, re-order and delete child "elements", without knowing
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* what these elements actually are and how they are to be handled.
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* - we recurse into mutating such an _"unspecified"_ child element.
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*
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* @todo this test is WIP as of 6/2016 !! What has to be done, is to work out a way how to create a TreeMutator binding. And of course, we need the Implementation of DiffApplicator<DiffMutable>
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* @note this test uses the same verb sequence as is assumed for the
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* coverage of diff building blocks in TreeMutatorBinding_test
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*
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* @see DiffTreeApplication_test generic variant of tree diff application
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* @see TreeMutatorBinding_test coverage of the "building blocks"
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* @see TreeMutator_test base operations of the adapter
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* @see tree-diff-mutator-binding.hpp
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* @see diff-tree-application.hpp
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* @see tree-diff.hpp
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*/
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class DiffVirtualisedApplication_test
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: public Test
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, TreeDiffLanguage
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{
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using DiffSeq = iter_stl::IterSnapshot<DiffStep>;
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DiffSeq
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populationDiff()
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{
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return snapshot({ins(ATTRIB1)
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, ins(ATTRIB3)
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, ins(ATTRIB3)
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, ins(CHILD_B)
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, ins(CHILD_B)
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, ins(CHILD_T)
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});
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} // ==> ATTRIB1, ATTRIB3, ATTRIB3, CHILD_B, CHILD_B, CHILD_T
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DiffSeq
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reorderingDiff()
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{
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return snapshot({find(ATTRIB3)
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, pick(ATTRIB1)
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, skip(ATTRIB3)
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, ins(ATTRIB2)
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, pick(ATTRIB3)
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, del(CHILD_B)
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, ins(SUB_NODE)
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, pick(CHILD_B)
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, pick(CHILD_T)
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});
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} // ==> ATTRIB3, ATTRIB1, ATTRIB2, ATTRIB3, SUB_NODE, CHILD_B, CHILD_T
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DiffSeq
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mutationDiff()
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{
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return snapshot({after(CHILD_B)
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, after(Ref::END)
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, set(GAMMA_PI)
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, mut(SUB_NODE)
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, ins(TYPE_X)
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, ins(ATTRIB2)
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, ins(CHILD_B)
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, ins(CHILD_A)
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, emu(SUB_NODE)
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, ins(ATTRIB_NODE)
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, mut(ATTRIB_NODE)
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, ins(TYPE_Z)
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, ins(CHILD_A)
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, ins(CHILD_A)
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, ins(CHILD_A)
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, emu(ATTRIB_NODE)
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});
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} // ==> ATTRIB3 := π, ATTRIB1, ATTRIB2, ATTRIB3,
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// ATTRIB_NODE{ type ζ, CHILD_A, CHILD_A, CHILD_A }
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// SUB_NODE{ type ξ, ATTRIB2, CHILD_B, CHILD_A },
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// CHILD_B, CHILD_T,
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virtual void
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run (Arg)
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{
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Opaque subject;
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DiffMutable& target = mutatorBinding (subject);
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DiffApplicator<DiffMutable> application(target);
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//
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// TODO verify results
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cout << "before..."<<endl << subject<<endl;
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// Part I : apply attribute changes
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application.consume(populationDiff());
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//
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// TODO verify results
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cout << "after...I"<<endl << subject<<endl;
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// Part II : apply child population
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application.consume(reorderingDiff());
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//
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// TODO verify results
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cout << "after...II"<<endl << subject<<endl;
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// Part II : apply child mutations
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application.consume(mutationDiff());
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//
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// TODO verify results
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cout << "after...III"<<endl << subject<<endl;
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}
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};
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/** Register this test class... */
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LAUNCHER (DiffVirtualisedApplication_test, "unit common");
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}}} // namespace lib::diff::test
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