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Diffstat (limited to 'indra/llcommon/tests/lllazy_test.cpp')
| -rw-r--r-- | indra/llcommon/tests/lllazy_test.cpp | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/indra/llcommon/tests/lllazy_test.cpp b/indra/llcommon/tests/lllazy_test.cpp new file mode 100644 index 0000000000..db581d650f --- /dev/null +++ b/indra/llcommon/tests/lllazy_test.cpp @@ -0,0 +1,227 @@ +/** + * @file lllazy_test.cpp + * @author Nat Goodspeed + * @date 2009-01-28 + * @brief Tests of lllazy.h. + * + * $LicenseInfo:firstyear=2009&license=viewergpl$ + * Copyright (c) 2009, Linden Research, Inc. + * $/LicenseInfo$ + */ + +// Precompiled header +#include "linden_common.h" +// associated header +#include "lllazy.h" +// STL headers +#include <iostream> +// std headers +// external library headers +#include <boost/lambda/construct.hpp> +#include <boost/lambda/bind.hpp> +// other Linden headers +#include "../test/lltut.h" + +namespace bll = boost::lambda; + +/***************************************************************************** +* Test classes +*****************************************************************************/ + +// Let's say that because of its many external dependencies, YuckyFoo is very +// hard to instantiate in a test harness. +class YuckyFoo +{ +public: + virtual ~YuckyFoo() {} + virtual std::string whoami() const { return "YuckyFoo"; } +}; + +// Let's further suppose that YuckyBar is another hard-to-instantiate class. +class YuckyBar +{ +public: + YuckyBar(const std::string& which): + mWhich(which) + {} + virtual ~YuckyBar() {} + + virtual std::string identity() const { return std::string("YuckyBar(") + mWhich + ")"; } + +private: + const std::string mWhich; +}; + +// Pretend that this class would be tough to test because, up until we started +// trying to test it, it contained instances of both YuckyFoo and YuckyBar. +// Now we've refactored so it contains LLLazy<YuckyFoo> and LLLazy<YuckyBar>. +// More than that, it contains them by virtue of deriving from +// LLLazyBase<YuckyFoo> and LLLazyBase<YuckyBar>. +// We postulate two different LLLazyBases because, with only one, you need not +// specify *which* get()/set() method you're talking about. That's a simpler +// case. +class NeedsTesting: public LLLazyBase<YuckyFoo>, public LLLazyBase<YuckyBar> +{ +public: + NeedsTesting(): + // mYuckyBar("RealYuckyBar") + LLLazyBase<YuckyBar>(bll::bind(bll::new_ptr<YuckyBar>(), "RealYuckyBar")) + {} + virtual ~NeedsTesting() {} + + virtual std::string describe() const + { + return std::string("NeedsTesting(") + getLazy<YuckyFoo>(this).whoami() + ", " + + getLazy<YuckyBar>(this).identity() + ")"; + } + +private: + // These instance members were moved to LLLazyBases: + // YuckyFoo mYuckyFoo; + // YuckyBar mYuckyBar; +}; + +// Fake up a test YuckyFoo class +class TestFoo: public YuckyFoo +{ +public: + virtual std::string whoami() const { return "TestFoo"; } +}; + +// and a test YuckyBar +class TestBar: public YuckyBar +{ +public: + TestBar(const std::string& which): YuckyBar(which) {} + virtual std::string identity() const + { + return std::string("TestBar(") + YuckyBar::identity() + ")"; + } +}; + +// So here's a test subclass of NeedsTesting that uses TestFoo and TestBar +// instead of YuckyFoo and YuckyBar. +class TestNeedsTesting: public NeedsTesting +{ +public: + TestNeedsTesting() + { + // Exercise setLazy(T*) + setLazy<YuckyFoo>(this, new TestFoo()); + // Exercise setLazy(Factory) + setLazy<YuckyBar>(this, bll::bind(bll::new_ptr<TestBar>(), "TestYuckyBar")); + } + + virtual std::string describe() const + { + return std::string("TestNeedsTesting(") + NeedsTesting::describe() + ")"; + } + + void toolate() + { + setLazy<YuckyFoo>(this, new TestFoo()); + } +}; + +// This class tests having an explicit LLLazy<T> instance as a named member, +// rather than deriving from LLLazyBase<T>. +class LazyMember +{ +public: + YuckyFoo& getYuckyFoo() { return *mYuckyFoo; } + std::string whoisit() const { return mYuckyFoo->whoami(); } + +protected: + LLLazy<YuckyFoo> mYuckyFoo; +}; + +// This is a test subclass of the above, dynamically replacing the +// LLLazy<YuckyFoo> member. +class TestLazyMember: public LazyMember +{ +public: + // use factory setter + TestLazyMember() + { + mYuckyFoo.set(bll::new_ptr<TestFoo>()); + } + + // use instance setter + TestLazyMember(YuckyFoo* instance) + { + mYuckyFoo.set(instance); + } +}; + +/***************************************************************************** +* TUT +*****************************************************************************/ +namespace tut +{ + struct lllazy_data + { + }; + typedef test_group<lllazy_data> lllazy_group; + typedef lllazy_group::object lllazy_object; + lllazy_group lllazygrp("lllazy"); + + template<> template<> + void lllazy_object::test<1>() + { + // Instantiate an official one, just because we can + NeedsTesting nt; + // and a test one + TestNeedsTesting tnt; +// std::cout << nt.describe() << '\n'; + ensure_equals(nt.describe(), "NeedsTesting(YuckyFoo, YuckyBar(RealYuckyBar))"); +// std::cout << tnt.describe() << '\n'; + ensure_equals(tnt.describe(), + "TestNeedsTesting(NeedsTesting(TestFoo, TestBar(YuckyBar(TestYuckyBar))))"); + } + + template<> template<> + void lllazy_object::test<2>() + { + TestNeedsTesting tnt; + std::string threw; + try + { + tnt.toolate(); + } + catch (const LLLazyCommon::InstanceChange& e) + { + threw = e.what(); + } + ensure_contains("InstanceChange exception", threw, "replace LLLazy instance"); + } + + template<> template<> + void lllazy_object::test<3>() + { + { + LazyMember lm; + // operator*() on-demand instantiation + ensure_equals(lm.getYuckyFoo().whoami(), "YuckyFoo"); + } + { + LazyMember lm; + // operator->() on-demand instantiation + ensure_equals(lm.whoisit(), "YuckyFoo"); + } + } + + template<> template<> + void lllazy_object::test<4>() + { + { + // factory setter + TestLazyMember tlm; + ensure_equals(tlm.whoisit(), "TestFoo"); + } + { + // instance setter + TestLazyMember tlm(new TestFoo()); + ensure_equals(tlm.whoisit(), "TestFoo"); + } + } +} // namespace tut |