320 lines
9.8 KiB
C++
320 lines
9.8 KiB
C++
/*
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MultiFact(Test) - cover the configurable object-family creating factory
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Copyright (C)
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2014, 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 multifact-test.cpp
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** unit test \ref MultiFact_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/multifact.hpp"
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#include "lib/util.hpp"
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#include <boost/lexical_cast.hpp>
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#include <functional>
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#include <memory>
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#include <string>
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namespace lib {
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namespace test{
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using boost::lexical_cast;
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using util::isSameObject;
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using util::isnil;
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using std::shared_ptr;
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using std::function;
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using std::string;
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using std::bind;
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using lumiera::error::LUMIERA_ERROR_INVALID;
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namespace { // hierarchy of test dummy objects
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struct Interface
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{
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virtual ~Interface() {};
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virtual operator string () =0;
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};
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enum theID
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{ ONE = 1
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, TWO
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, THR
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, FOU
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};
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template<theID ii>
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class Implementation
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: public Interface
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{
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string instanceID_;
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operator string()
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{
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return instanceID_ + lexical_cast<string> (ii);
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}
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public:
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Implementation(string id = "Impl-")
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: instanceID_(id)
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{ }
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};
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template<typename X>
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string
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buildSome (X rawVal)
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{
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return lexical_cast<string> (rawVal);
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}
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string
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buildOne()
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{
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return buildSome(ONE);
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}
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}
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/******************************************************************************//**
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* @test verify the basic usage patterns of the configurable factory template.
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* - Depending on the concrete fabrication signature, the factory can produce
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* "things" by invoking suitable fabrication functions. These functions
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* are to be installed beforehand, and can be addressed through an ID.
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* - these fabrication functions are installed per instance of the factory.
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* Such a concrete factory configuration can be copied
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* - optionally each created product can be passed through a wrapper function
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* - there is a preconfigured wrapper for creating refcounting smart ptrs.
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* - it is possible to define a custom wrapper function on factory setup.
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* @see lib::MultiFact
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*/
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class MultiFact_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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produce_simple_values();
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produce_smart_pointers();
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pass_additional_arguments();
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fed_a_custom_finishing_functor();
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}
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string
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callMe (string val)
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{
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++invocations_;
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return val;
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}
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uint invocations_ = 0;
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void
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produce_simple_values()
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{
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using TestFactory = factory::MultiFact<string, theID>;
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TestFactory theFact;
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// the first "production line" is wired to a free function
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theFact.defineProduction (ONE, buildOne);
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// second "production line" uses a explicit partial closure
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theFact.defineProduction (TWO, bind (buildSome<theID>, TWO));
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// for the third "production line" we set up a function object
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auto memberFunction = bind (&MultiFact_test::callMe, this, "lalü");
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theFact.defineProduction (THR, memberFunction);
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// and the fourth "production line" uses a lambda, closed with a local reference
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string backdoor("backdoor");
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theFact.defineProduction (FOU, [&] {
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return backdoor;
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});
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CHECK (!isnil (theFact));
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CHECK (theFact(ONE) == "1");
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CHECK (theFact(TWO) == "2");
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CHECK (theFact(THR) == "lalü");
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CHECK (invocations_ == 1);
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CHECK (theFact(FOU) == "backdoor");
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backdoor = "I am " + backdoor.substr(0,4);
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CHECK (theFact(FOU) == "I am back");
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TestFactory anotherFact;
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CHECK (isnil (anotherFact));
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VERIFY_ERROR (INVALID, anotherFact(ONE) );
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anotherFact.defineProduction (ONE, memberFunction);
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CHECK (anotherFact(ONE) == "lalü");
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CHECK (invocations_ == 2);
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CHECK (theFact(THR) == "lalü");
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CHECK (invocations_ == 3);
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CHECK ( theFact.contains (FOU));
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CHECK (!anotherFact.contains (FOU));
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anotherFact = theFact;
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CHECK (anotherFact.contains (FOU));
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CHECK (!isSameObject(theFact, anotherFact));
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CHECK (anotherFact(ONE) == "1");
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CHECK (anotherFact(TWO) == "2");
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CHECK (anotherFact(THR) == "lalü");
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CHECK (anotherFact(FOU) == "I am back");
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CHECK (invocations_ == 4);
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}
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void
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produce_smart_pointers()
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{
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using TestFactory = factory::MultiFact<Interface, theID, factory::BuildRefcountPtr>;
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using PIfa = shared_ptr<Interface>;
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TestFactory theFact;
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// set up the "production lines" by lambda
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theFact.defineProduction (ONE, [] { return new Implementation<ONE>; });
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theFact.defineProduction (TWO, [] { return new Implementation<TWO>; });
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theFact.defineProduction (THR, [] { return new Implementation<THR>; });
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theFact.defineProduction (FOU, [] { return new Implementation<FOU>; });
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CHECK (!isnil (theFact));
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PIfa p1 = theFact(ONE);
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PIfa p2 = theFact(TWO);
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PIfa p3 = theFact(THR);
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PIfa p4 = theFact(FOU);
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PIfa p11 = theFact(ONE);
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CHECK ("Impl-1" == string(*p1));
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CHECK ("Impl-2" == string(*p2));
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CHECK ("Impl-3" == string(*p3));
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CHECK ("Impl-4" == string(*p4));
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CHECK ("Impl-1" == string(*p11));
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CHECK (!isSameObject(*p1, *p11));
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PIfa p12(p11);
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CHECK (isSameObject(*p11, *p12));
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CHECK ("Impl-1" == string(*p12));
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CHECK (1 == p1.use_count());
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CHECK (2 == p11.use_count());
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CHECK (2 == p12.use_count());
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}
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void
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pass_additional_arguments()
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{
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using TestFactory = factory::MultiFact<Interface*(string), theID>;
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TestFactory theFact;
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// set up the "production lines"
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theFact.defineProduction (ONE, [](string ) { return new Implementation<ONE>; });
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theFact.defineProduction (TWO, [](string ) { return new Implementation<TWO>("X"); });
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theFact.defineProduction (THR, [](string id) { return new Implementation<THR>(id); });
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theFact.defineProduction (FOU, [](string id) { return new Implementation<FOU>("Z"+id);});
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Interface *p1 = theFact(ONE, "irrelevant"),
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*p2 = theFact(TWO, "ignored"),
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*p3 = theFact(THR, "idiocy"),
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*p4 = theFact(FOU, "omg"),
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*p5 = theFact(FOU, "z");
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// does not compile...
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// theFact(ONE);
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// theFact(ONE, "foo", bar);
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CHECK ("Impl-1" == string(*p1));
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CHECK ("X2" == string(*p2));
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CHECK ("idiocy3"== string(*p3));
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CHECK ("Zomg4" == string(*p4));
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CHECK ("Zz4" == string(*p5));
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CHECK (!isSameObject(*p4, *p5));
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CHECK (INSTANCEOF(Implementation<ONE>, p1));
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CHECK (INSTANCEOF(Implementation<TWO>, p2));
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CHECK (INSTANCEOF(Implementation<THR>, p3));
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CHECK (INSTANCEOF(Implementation<FOU>, p4));
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CHECK (INSTANCEOF(Implementation<FOU>, p5));
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delete p1;
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delete p2;
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delete p3;
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delete p4;
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delete p5;
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}
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void
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fed_a_custom_finishing_functor()
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{
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using TestFactory = factory::MultiFact<int(int), theID, factory::Build<long>::Wrapper>;
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TestFactory theFact;
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// Setup(1): each "production line" does a distinct calculation
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theFact.defineProduction (ONE, [](int par) { return par; });
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theFact.defineProduction (TWO, [](int par) { return 2 * par; });
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theFact.defineProduction (THR, [](int par) { return par*par; });
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theFact.defineProduction (FOU, [](int par) { return 1 << par;});
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// Setup(2): and a common "wrapper functor" finishes
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// the output of the chosen "production line"
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theFact.defineFinalWrapper([](int raw) { return raw + 1; });
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CHECK (long(1 + 1) == theFact(ONE, 1));
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CHECK (long(1 + 2) == theFact(ONE, 2));
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CHECK (long(1 + 3) == theFact(ONE, 3));
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CHECK (long(1 + 2) == theFact(TWO, 1));
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CHECK (long(1 + 4) == theFact(TWO, 2));
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CHECK (long(1 + 6) == theFact(TWO, 3));
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CHECK (long(1 + 1) == theFact(THR, 1));
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CHECK (long(1 + 4) == theFact(THR, 2));
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CHECK (long(1 + 9) == theFact(THR, 3));
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CHECK (long(1 + 2) == theFact(FOU, 1));
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CHECK (long(1 + 4) == theFact(FOU, 2));
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CHECK (long(1 + 8) == theFact(FOU, 3));
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}
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};
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/** Register this test class... */
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LAUNCHER (MultiFact_test, "unit common");
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}} // namespace lib::test
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