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/**
* @file llsingleton_test.cpp
* @date 2011-08-11
* @brief Unit test for the LLSingleton class
*
* $LicenseInfo:firstyear=2011&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2011, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#include "linden_common.h"
#include "llsingleton.h"
#include "../test/lltut.h"
#include "wrapllerrs.h"
#include "llsd.h"
// Capture execution sequence by appending to log string.
std::string sLog;
#define DECLARE_CLASS(CLS) \
struct CLS: public LLSingleton<CLS> \
{ \
LLSINGLETON(CLS); \
~CLS(); \
public: \
static enum dep_flag { \
DEP_NONE, /* no dependency */ \
DEP_CTOR, /* dependency in ctor */ \
DEP_INIT /* dependency in initSingleton */ \
} sDepFlag; \
\
void initSingleton() override; \
void cleanupSingleton() override; \
}; \
\
CLS::dep_flag CLS::sDepFlag = DEP_NONE
DECLARE_CLASS(A);
DECLARE_CLASS(B);
#define DEFINE_MEMBERS(CLS, OTHER) \
CLS::CLS() \
{ \
sLog.append(#CLS); \
if (sDepFlag == DEP_CTOR) \
{ \
(void)OTHER::instance(); \
} \
} \
\
void CLS::initSingleton() \
{ \
sLog.append("i" #CLS); \
if (sDepFlag == DEP_INIT) \
{ \
(void)OTHER::instance(); \
} \
} \
\
void CLS::cleanupSingleton() \
{ \
sLog.append("x" #CLS); \
} \
\
CLS::~CLS() \
{ \
sLog.append("~" #CLS); \
}
DEFINE_MEMBERS(A, B)
DEFINE_MEMBERS(B, A)
namespace tut
{
struct singleton
{
// We need a class created with the LLSingleton template to test with.
class LLSingletonTest: public LLSingleton<LLSingletonTest>
{
LLSINGLETON_EMPTY_CTOR(LLSingletonTest);
};
};
typedef test_group<singleton> singleton_t;
typedef singleton_t::object singleton_object_t;
tut::singleton_t tut_singleton("LLSingleton");
template<> template<>
void singleton_object_t::test<1>()
{
}
template<> template<>
void singleton_object_t::test<2>()
{
LLSingletonTest* singleton_test = LLSingletonTest::getInstance();
ensure(singleton_test);
}
template<> template<>
void singleton_object_t::test<3>()
{
//Construct the instance
LLSingletonTest::getInstance();
ensure(LLSingletonTest::instanceExists());
//Delete the instance
LLSingletonTest::deleteSingleton();
ensure(!LLSingletonTest::instanceExists());
//Construct it again.
LLSingletonTest* singleton_test = LLSingletonTest::getInstance();
ensure(singleton_test);
ensure(LLSingletonTest::instanceExists());
}
#define TESTS(CLS, OTHER, N0, N1, N2, N3) \
template<> template<> \
void singleton_object_t::test<N0>() \
{ \
set_test_name("just " #CLS); \
CLS::sDepFlag = CLS::DEP_NONE; \
OTHER::sDepFlag = OTHER::DEP_NONE; \
sLog.clear(); \
\
(void)CLS::instance(); \
ensure_equals(sLog, #CLS "i" #CLS); \
LLSingletonBase::deleteAll(); \
ensure_equals(sLog, #CLS "i" #CLS "x" #CLS "~" #CLS); \
} \
\
template<> template<> \
void singleton_object_t::test<N1>() \
{ \
set_test_name(#CLS " ctor depends " #OTHER); \
CLS::sDepFlag = CLS::DEP_CTOR; \
OTHER::sDepFlag = OTHER::DEP_NONE; \
sLog.clear(); \
\
(void)CLS::instance(); \
ensure_equals(sLog, #CLS #OTHER "i" #OTHER "i" #CLS); \
LLSingletonBase::deleteAll(); \
ensure_equals(sLog, #CLS #OTHER "i" #OTHER "i" #CLS "x" #CLS "~" #CLS "x" #OTHER "~" #OTHER); \
} \
\
template<> template<> \
void singleton_object_t::test<N2>() \
{ \
set_test_name(#CLS " init depends " #OTHER); \
CLS::sDepFlag = CLS::DEP_INIT; \
OTHER::sDepFlag = OTHER::DEP_NONE; \
sLog.clear(); \
\
(void)CLS::instance(); \
ensure_equals(sLog, #CLS "i" #CLS #OTHER "i" #OTHER); \
LLSingletonBase::deleteAll(); \
ensure_equals(sLog, #CLS "i" #CLS #OTHER "i" #OTHER "x" #CLS "~" #CLS "x" #OTHER "~" #OTHER); \
} \
\
template<> template<> \
void singleton_object_t::test<N3>() \
{ \
set_test_name(#CLS " circular init"); \
CLS::sDepFlag = CLS::DEP_INIT; \
OTHER::sDepFlag = OTHER::DEP_CTOR; \
sLog.clear(); \
\
(void)CLS::instance(); \
ensure_equals(sLog, #CLS "i" #CLS #OTHER "i" #OTHER); \
LLSingletonBase::deleteAll(); \
ensure_equals(sLog, #CLS "i" #CLS #OTHER "i" #OTHER "x" #CLS "~" #CLS "x" #OTHER "~" #OTHER); \
}
TESTS(A, B, 4, 5, 6, 7)
TESTS(B, A, 8, 9, 10, 11)
#define PARAMSINGLETON(cls) \
class cls: public LLParamSingleton<cls> \
{ \
LLSINGLETON(cls, const LLSD::String& str): mDesc(str) {} \
cls(LLSD::Integer i): mDesc(i) {} \
\
public: \
std::string desc() const { return mDesc.asString(); } \
\
private: \
LLSD mDesc; \
}
// Declare two otherwise-identical LLParamSingleton classes so we can
// validly initialize each using two different constructors. If we tried
// to test that with a single LLParamSingleton class within the same test
// program, we'd get 'trying to use deleted LLParamSingleton' errors.
PARAMSINGLETON(PSing1);
PARAMSINGLETON(PSing2);
template<> template<>
void singleton_object_t::test<12>()
{
set_test_name("LLParamSingleton");
WrapLLErrs catcherr;
// query methods
ensure("false positive on instanceExists()", ! PSing1::instanceExists());
ensure("false positive on wasDeleted()", ! PSing1::wasDeleted());
// try to reference before initializing
std::string threw = catcherr.catch_llerrs([](){
(void)PSing1::instance();
});
ensure_contains("too-early instance() didn't throw", threw, "Uninitialized");
// getInstance() behaves the same as instance()
threw = catcherr.catch_llerrs([](){
(void)PSing1::getInstance();
});
ensure_contains("too-early getInstance() didn't throw", threw, "Uninitialized");
// initialize using LLSD::String constructor
PSing1::initParamSingleton("string");
ensure_equals(PSing1::instance().desc(), "string");
ensure("false negative on instanceExists()", PSing1::instanceExists());
// try to initialize again
threw = catcherr.catch_llerrs([](){
PSing1::initParamSingleton("again");
});
ensure_contains("second ctor(string) didn't throw", threw, "twice");
#ifndef LL_GNUC // FIXME: Fails to build under GCC
// try to initialize using the other constructor -- should be
// well-formed, but illegal at runtime
threw = catcherr.catch_llerrs([](){
PSing1::initParamSingleton(17);
});
ensure_contains("other ctor(int) didn't throw", threw, "twice");
#endif
PSing1::deleteSingleton();
ensure("false negative on wasDeleted()", PSing1::wasDeleted());
threw = catcherr.catch_llerrs([](){
(void)PSing1::instance();
});
ensure_contains("accessed deleted LLParamSingleton", threw, "deleted");
}
#ifndef LL_GNUC // FIXME: Fails to build under GCC
template<> template<>
void singleton_object_t::test<13>()
{
set_test_name("LLParamSingleton alternate ctor");
WrapLLErrs catcherr;
// We don't have to restate all the tests for PSing1. Only test validly
// using the other constructor.
PSing2::initParamSingleton(17);
ensure_equals(PSing2::instance().desc(), "17");
// can't do it twice
std::string threw = catcherr.catch_llerrs([](){
PSing2::initParamSingleton(34);
});
ensure_contains("second ctor(int) didn't throw", threw, "twice");
// can't use the other constructor either
threw = catcherr.catch_llerrs([](){
PSing2::initParamSingleton("string");
});
ensure_contains("other ctor(string) didn't throw", threw, "twice");
}
#endif
class CircularPCtor: public LLParamSingleton<CircularPCtor>
{
LLSINGLETON(CircularPCtor)
{
// never mind indirection, just go straight for the circularity
(void)instance();
}
};
template<> template<>
void singleton_object_t::test<14>()
{
set_test_name("Circular LLParamSingleton constructor");
WrapLLErrs catcherr;
std::string threw = catcherr.catch_llerrs([](){
CircularPCtor::initParamSingleton();
});
ensure_contains("constructor circularity didn't throw", threw, "constructor");
}
class CircularPInit: public LLParamSingleton<CircularPInit>
{
LLSINGLETON_EMPTY_CTOR(CircularPInit);
public:
virtual void initSingleton() override
{
// never mind indirection, just go straight for the circularity
CircularPInit *pt = getInstance();
if (!pt)
{
throw;
}
}
};
template<> template<>
void singleton_object_t::test<15>()
{
set_test_name("Circular LLParamSingleton initSingleton()");
WrapLLErrs catcherr;
std::string threw = catcherr.catch_llerrs([](){
CircularPInit::initParamSingleton();
});
ensure("initSingleton() circularity threw", threw.empty());
}
}
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