lumiera_documentation/tests/basics/singleton-test.cpp
Ichthyostega 9c74466778 Tests: build an link a test-support library
This is something I wanted to clean-up since a very long time indeed,
but always postponed it, since it requires a lot of nasty clean-up and disentangling....

Several parts had been stashed away into `src/lib/test`, which are not really related:
 * the testrunner and testsuite builder
 * generic helper utilities
 * specialised test-support facilities, e.g. the EventLog

This changeset introduces a new top-level test folder and a namespace `::test`
Code from this folder is linked into a shared library `libtestsupport.so`,
which resides in the linkage hierarchy between »Vessel« and »Vault«,
yet is no longer part of the Lumiera application and only linked into the test-suite.
2026-03-06 23:16:32 +01:00

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/*
Singleton(Test) - unittest for our Singleton template
Copyright (C)
2008, Hermann Vosseler <Ichthyostega@web.de>
  **Lumiera** is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License as published by the
  Free Software Foundation; either version 2 of the License, or (at your
  option) any later version. See the file COPYING for further details.
* *****************************************************************/
/** @file singleton-test.cpp
** unit test \ref Singleton_test
*/
#include "test/run.hpp"
#include "lib/format-string.hpp"
#include "lib/format-cout.hpp"
#include "lib/util.hpp"
#include "test-target-obj.hpp"
#include "lib/depend.hpp"
#include <boost/lexical_cast.hpp>
using boost::lexical_cast;
using util::isSameObject;
using util::_Fmt;
using util::isnil;
using std::string;
namespace lib {
namespace test{
/**
* Target object to be instantiated as Singleton
* Allocates a variable amount of additional heap memory
* and prints diagnostic messages.
*/
class TargetObj : public TestTargetObj
{
public:
static int cnt;
static void setCountParam (uint c) { TargetObj::cnt = c; }
protected:
TargetObj () : TestTargetObj(cnt) {}
friend class lib::DependencyFactory<TargetObj>;
};
int TargetObj::cnt = 0;
/***************************************************************//**
* @test implement a Singleton class using our Singleton Template.
* Expected results: single instance created in static memory,
* single instance properly destroyed, no memory leaks.
* @see lib::Depend
* @see lib::DependencyFactory::InstanceHolder
*/
class Singleton_test : public Test
{
virtual void
run (Arg arg)
{
uint num{firstVal (arg)};
Depend<TargetObj> singleton;
cout << _Fmt("testing TargetObj(%d) as Singleton\n") % num;
TargetObj::setCountParam(num);
TargetObj& t1 = singleton();
TargetObj& t2 = singleton();
CHECK (isSameObject(t1, t2), "not a Singleton, got two different instances." );
cout << "calling a non-static method on the Singleton instance" <<endl
<< t1 << endl;
}
};
/** Register this test class... */
LAUNCHER (Singleton_test, "unit common");
}} // namespace lib::test