Ichthyostega
806db414dd
* Lumiera source code always was copyrighted by individual contributors * there is no entity "Lumiera.org" which holds any copyrights * Lumiera source code is provided under the GPL Version 2+ == Explanations == Lumiera as a whole is distributed under Copyleft, GNU General Public License Version 2 or above. For this to become legally effective, the ''File COPYING in the root directory is sufficient.'' The licensing header in each file is not strictly necessary, yet considered good practice; attaching a licence notice increases the likeliness that this information is retained in case someone extracts individual code files. However, it is not by the presence of some text, that legally binding licensing terms become effective; rather the fact matters that a given piece of code was provably copyrighted and published under a license. Even reformatting the code, renaming some variables or deleting parts of the code will not alter this legal situation, but rather creates a derivative work, which is likewise covered by the GPL! The most relevant information in the file header is the notice regarding the time of the first individual copyright claim. By virtue of this initial copyright, the first author is entitled to choose the terms of licensing. All further modifications are permitted and covered by the License. The specific wording or format of the copyright header is not legally relevant, as long as the intention to publish under the GPL remains clear. The extended wording was based on a recommendation by the FSF. It can be shortened, because the full terms of the license are provided alongside the distribution, in the file COPYING.
261 lines
7.4 KiB
C++
261 lines
7.4 KiB
C++
/*
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Variant(Test) - verify the lightweight typesafe union record
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Copyright (C)
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2015, 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 variant-test.cpp
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** unit test \ref Variant_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/time/timevalue.hpp"
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#include "lib/format-cout.hpp"
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#include "lib/variant.hpp"
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#include "lib/util.hpp"
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#include <string>
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namespace lib {
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namespace test{
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using ::Test;
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using meta::Types;
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using lib::time::Time;
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using lib::time::TimeVar;
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using util::contains;
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using std::string;
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using error::LUMIERA_ERROR_WRONG_TYPE;
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using error::LUMIERA_ERROR_LOGIC;
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// Test fixture...
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typedef Variant<Types<bool,int,string,Time>> TestVariant;
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/****************************************************************************//**
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* @test cover the essential properties of Lumiera's lightweight variant record.
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* - this typesafe union can never be constructed empty
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* - it defaults to the default constructed first type in list
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* - it is copyable and assignable, but only with compatible type
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* - value access requires knowledge of the contained type
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* - generic visitor style access
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*
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* @see lib::Variant
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* @see util::AccessCasted
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* @see lib::OpaqueHolder
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* @see TreeMutator_test
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*/
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class Variant_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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createVariant();
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accessVariant();
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acceptPredicate();
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verifyAssignment();
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}
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void
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createVariant()
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{
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Time someTime;
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TestVariant v0;
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TestVariant v1(11);
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TestVariant v2(string("lololo"));
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TestVariant v3(someTime);
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//// does not compile....
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// TestVariant evil(3.1415);
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cout << v0 <<endl
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<< v1 <<endl
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<< v2 <<endl
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<< v3 <<endl;
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CHECK (contains (string(v0), "Variant"));
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CHECK (contains (string(v0), "bool"));
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CHECK (contains (string(v0), "false"));
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CHECK (contains (string(v1), "Variant"));
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CHECK (contains (string(v1), "int"));
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CHECK (contains (string(v1), "11"));
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CHECK (contains (string(v2), "Variant"));
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CHECK (contains (string(v2), "string"));
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CHECK (contains (string(v2), "lololo"));
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CHECK (contains (string(v3), "Variant"));
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CHECK (contains (string(v3), "Time"));
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CHECK (contains (string(v3), "0:00:00.000"));
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}
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void
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accessVariant()
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{
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int someVal = rani(10000);
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string someStr = randStr(55);
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Time someTime = randTime();
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TestVariant v3(someTime);
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TestVariant v2(someStr);
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TestVariant v1 = someVal;
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TestVariant v0; v0 = true;
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CHECK (true == v0.get<bool>() );
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CHECK (someVal == v1.get<int>());
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CHECK (someStr == v2.get<string>() );
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CHECK (someTime == v3.get<Time>() );
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VERIFY_ERROR (WRONG_TYPE, v0.get<int>() );
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VERIFY_ERROR (WRONG_TYPE, v0.get<string>() );
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VERIFY_ERROR (WRONG_TYPE, v0.get<Time>() );
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VERIFY_ERROR (WRONG_TYPE, v1.get<bool>() );
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VERIFY_ERROR (WRONG_TYPE, v1.get<string>() );
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VERIFY_ERROR (WRONG_TYPE, v1.get<Time>() );
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VERIFY_ERROR (WRONG_TYPE, v2.get<bool>() );
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VERIFY_ERROR (WRONG_TYPE, v2.get<int>() );
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VERIFY_ERROR (WRONG_TYPE, v2.get<Time>() );
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VERIFY_ERROR (WRONG_TYPE, v3.get<bool>() );
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VERIFY_ERROR (WRONG_TYPE, v3.get<int>() );
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VERIFY_ERROR (WRONG_TYPE, v3.get<string>() );
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//// does not compile...
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// v0.get<int>();
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// v1.get<double>();
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// v3.get<TimeVar>();
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struct Accessor
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: TestVariant::Visitor
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{
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bool b_ = false;
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int i_ = 12;
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TimeVar t_;
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void handle (bool& b) { b_ = b; }
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void handle (Time& t) { t_ = t; }
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void handle (int& i6)
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{
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i_ = i6;
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++i6;
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}
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};
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Accessor acs;
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CHECK (!acs.b_);
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CHECK (acs.i_ == 12);
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v0.accept (acs);
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CHECK (acs.b_);
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CHECK (acs.i_ == 12);
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v3.accept (acs);
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CHECK (acs.b_);
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CHECK (acs.i_ == 12);
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CHECK (acs.t_ == someTime);
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v2.accept (acs);
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// nothing changed,
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// since we defined no accessor function
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CHECK (acs.b_);
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CHECK (acs.i_ == 12);
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CHECK (acs.t_ == someTime);
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v1.accept (acs);
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CHECK (acs.b_);
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CHECK (acs.t_ == someTime);
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CHECK (acs.i_ == someVal);
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// side-effect!
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CHECK (someVal+1 == v1.get<int>());
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v1.accept (acs);
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CHECK (someVal+2 == v1.get<int>());
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CHECK (someVal+1 == acs.i_);
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}
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void
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acceptPredicate()
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{
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const TestVariant v1(12);
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const TestVariant v2(string("123"));
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const TestVariant v3(Time::NEVER);
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struct Checker
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: TestVariant::Predicate
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{
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bool handle (int const& i) { return i % 2; }
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bool handle (string const& s) { return s.length() % 2; }
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}
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check;
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CHECK (12 == v1.get<int>());
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CHECK ("123" == v2.get<string>());
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CHECK (Time::NEVER == v3.get<Time>());
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CHECK (!v1.accept(check));
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CHECK ( v2.accept(check));
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CHECK (!v3.accept(check));
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CHECK (12 == v1.get<int>());
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CHECK ("123" == v2.get<string>());
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CHECK (Time::NEVER == v3.get<Time>());
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}
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void
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verifyAssignment()
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{
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TestVariant v1(string("boo"));
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TestVariant v2(23);
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TestVariant v3(42);
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v1 = string("booo");
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v2 = v3;
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v3 = 24;
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CHECK ("booo" == v1.get<string>());
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CHECK (42 == v2.get<int>());
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CHECK (24 == v3.get<int>());
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VERIFY_ERROR (WRONG_TYPE, v1 = v2 );
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VERIFY_ERROR (WRONG_TYPE, v1 = 22);
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VERIFY_ERROR (WRONG_TYPE, v2 = string("2"));
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TestVariant v4 = Time();
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TestVariant v44 = Time(0,4,4,4); // OK: copy initialisation
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VERIFY_ERROR (LOGIC, v4 = v44); // Runtime Error: not assignable
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// v44 = Time(4,4); // does not compile: Time is not assignable
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}
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};
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/** Register this test class... */
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LAUNCHER (Variant_test, "unit common");
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}} // namespace lib::test
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