Ichthyostega
acc77654d1
after all the relevant library components do support both kinds of type sequences transparently, any usages in core code can now be switched over to the new, variadic type sequences.
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::TySeq;
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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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using TestVariant = Variant<TySeq<bool,int,string,Time>>;
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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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