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5 class Foo public: bool Bar() IUnknown * punk = NULL; HRESULT hr = CoCreateInstance(SOME_CLSID, NULL, CLSCTX_LOCAL_SERVER, SOME_IID, (LPVOID*)&pUnk); if (SUCCEEDED(hr)) // do some work... punk->release(); return true; return false; // do some other work... ;

6 class Foo public: bool Bar() IUnknown * punk = NULL; HRESULT hr = CoCreateInstance(SOME_CLSID, NULL, CLSCTX_LOCAL_SERVER, SOME_IID, (LPVOID*)&pUnk); if (SUCCEEDED(hr)) // do some work... punk->release(); return true; return false; // do some other work... private: virtual HRESULT CoCreateInstance( in REFCLSID rclsid, in_opt LPUNKNOWN punkouter, i return ::CoCreateInstance(rclsid, punkouter, dwclscontext, riid, ppv); ;

7 TESTMETHOD(TestSubclass) class TestFoo : public Foo private: virtual HRESULT CoCreateInstance( in REFCLSID rclsid, in_opt LPUNKNOWN punkouter, return E_NOINTERFACE; ; assert(false == TestFoo().Bar());

8 class Foo public: static bool Bar() IUnknown * punk = NULL; HRESULT hr = CoCreateInstance(SOME_CLSID, NULL, CLSCTX_LOCAL_SERVER, SOME_IID, (LPVOID*)&pUnk); if (SUCCEEDED(hr)) // do some work... punk->release(); return true; // do some other work... return false; ;

9 struct Empty; template<typename Base> class FooT : public Base public: static bool Bar() IUnknown * punk = NULL; HRESULT hr = CoCreateInstance(SOME_CLSID, NULL, CLSCTX_LOCAL_SERVER, SOME_IID, (LPVOID*)&pUnk); if (SUCCEEDED(hr)) // do some work... punk->release(); return true; // do some other work... return false; ; typedef FooT<Empty> Foo;

10 TESTMETHOD(TBCIMockingCAPIWithEllipsis) struct TestBase static HRESULT CoCreateInstance(...) return E_NOINTERFACE; ; assert(false == FooT<TestBase>().Bar()); ;

11 TESTMETHOD(TBCIMockingCAPIWithData) struct TestBase struct MyUnknown : public IUnknown ULONG ul; MyUnknown() : ul(1) virtual HRESULT QueryInterface(REFIID riid, void**ppvobject) return E_FAIL; virtual ULONG STDMETHODCALLTYPE AddRef () return ++ul; virtual ULONG STDMETHODCALLTYPE Release() return --ul; m_unk; HRESULT CoCreateInstance(REFCLSID rclsid, LPUNKNOWN punkouter, DWORD dwclscontext, R *ppv = &m_unk; return S_OK; ; FooT<TestBase> foo; assert(true == foo.bar()); assert(0 == foo.m_unk.ul); ;

12 class Foo public: bool Bar2() Baz baz; if (baz.isittrue()) // do some work... return true; // do some other work... return false; ;

13 struct Empty; template<typename Base> class FooT : public Base public: bool Bar2() Baz baz; if (baz.isittrue()) // do some work... return true; // do some other work... return false; ; typedef FooT<Empty> Foo;

14 TESTMETHOD(TBCIMockingAnAutomaticVariable) struct TestBase struct Baz bool IsIsTrue() return true; ; ; assert(true == FooT<TestBase>().Bar2()); ;

15 class Foo public: bool Bar3() Abc abc; HRESULT hr1 = abc.dowork(); Def def; HRESULT hr2 = def.dowork(); return (SUCCEEDED(hr1) && SUCCEEDED(hr2)); ;

16 struct Empty; template<typename Base> class FooT : public Base public: bool Bar3() Abc abc; HRESULT hr1 = abc.dowork(); Def def; HRESULT hr2 = def.dowork(); return (SUCCEEDED(hr1) && SUCCEEDED(hr2)); ; typedef FooT<Empty> Foo;

17 struct AbcFailing HRESULT DoWork() return E_FAIL; ; struct AbcSucceed HRESULT DoWork() return S_OK; ; struct DefFailing HRESULT DoWork() return E_FAIL; ; struct DefSucceed HRESULT DoWork() return S_OK; ; template<typename A, typename D> struct TestBaseT typedef A Abc; typedef D Def; ; TESTMETHOD(CompositingMocks) assert(false == (FooT<TestBaseT<AbcFailing, DefFailing>>().Bar3())); assert(false == (FooT<TestBaseT<AbcFailing, DefSucceed>>().Bar3())); assert(false == (FooT<TestBaseT<AbcSucceed, DefFailing>>().Bar3())); assert( true == (FooT<TestBaseT<AbcSucceed, DefSucceed>>().Bar3()));

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21 struct Empty typedef ::Baz Baz; ; template<typename Base> class FooT : public Base using typename Base::Baz; public: bool Bar2() Baz baz; if (baz.isittrue()) // do some work... return true; // do some other work... return false; ; typedef FooT<Empty> Foo;

22 struct Empty static inline HRESULT CoCreateInstance( in REFCLSID rclsid, in_opt LPUNKNOWN punkouter, return ::CoCreateInstance(rclsid, punkouter, dwclscontext, riid, ppv); ; template<typename Base> class FooT : public Base using Base::CoCreateInstance; public: static bool Bar() IUnknown * punk = NULL; HRESULT hr = CoCreateInstance(SOME_CLSID NULL, CLSCTX_LOCAL_SERVER, SOME_IID, (LPVOI if (SUCCEEDED(hr)) // do some work... punk->release(); return true; return false; // do some other work... ; typedef FooT<Empty> Foo;

23 #ifdef TESTING #define TESTABLESTRUCT(c) template<typename Base> struct c : public Base #else #define TESTABLESTRUCT(c) struct c #endif // kernel.c TESTABLESTRUCT(Foo) bool Bar2() Baz baz; if (baz.isittrue()) // do some work... return true; // do some other work... return false; ;

24 // kerneltests.cpp #define TESTING #include kernel.c TESTMETHOD(KernelModeExample) struct TestBase struct Baz bool IsIsTrue() return true; ; ; assert(true == Foo<TestBase>().Bar2());

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