Я использую библиотеку Boost:: Test для модульного тестирования, и я вообще взломал свои собственные издевательские решения, которые выглядят примерно так:
//In header for clients
struct RealFindFirstFile
{
static HANDLE FindFirst(LPCWSTR lpFileName, LPWIN32_FIND_DATAW lpFindFileData) {
return FindFirstFile(lpFileName, lpFindFileData);
};
};
template <typename FirstFile_T = RealFindFirstFile>
class DirectoryIterator {
//.. Implementation
}
//In unit tests (cpp)
#define THE_ANSWER_TO_LIFE_THE_UNIVERSE_AND_EVERYTHING 42
struct FakeFindFirstFile
{
static HANDLE FindFirst(LPCWSTR lpFileName, LPWIN32_FIND_DATAW lpFindFileData) {
return THE_ANSWER_TO_LIFE_THE_UNIVERSE_AND_EVERYTHING;
};
};
BOOST_AUTO_TEST_CASE( MyTest )
{
DirectoryIterator<FakeFindFirstFile> LookMaImMocked;
//Test
}
Я расстроился из-за этого, потому что он требует, чтобы я реализовал почти все как шаблон, и для достижения того, что я ищу, очень много кода шаблона.
Есть ли хороший способ издеваться над кодом, используя Boost:: Test по моему Ad-hoc-методу?
Я видел, как несколько человек рекомендуют Google Mock, но для этого требуется много уродливых хаков, если ваши функции не virtual
, чего я бы хотел избежать.
О: Последнее. Мне не нужны утверждения о том, что был вызван конкретный фрагмент кода. Мне просто нужно иметь возможность вводить данные, которые обычно возвращаются функциями Windows API.
EDIT: Вот пример набора классов и тестов, которые у меня есть для него:
Проверяемые классы:
#include <list>
#include <string>
#include <boost/noncopyable.hpp>
#include <boost/make_shared.hpp>
#include <boost/iterator/iterator_facade.hpp>
#include <Windows.h>
#include <Shlwapi.h>
#pragma comment(lib, "shlwapi.lib")
#include "../Exception.hpp"
namespace WindowsAPI { namespace FileSystem {
//For unit testing
struct RealFindXFileFunctions
{
HANDLE FindFirst(LPCWSTR lpFileName, LPWIN32_FIND_DATAW lpFindFileData) {
return FindFirstFile(lpFileName, lpFindFileData);
};
BOOL FindNext(HANDLE hFindFile, LPWIN32_FIND_DATAW lpFindFileData) {
return FindNextFile(hFindFile, lpFindFileData);
};
BOOL Close(HANDLE hFindFile) {
return FindClose(hFindFile);
};
};
class Win32FindData {
WIN32_FIND_DATA internalData;
std::wstring rootPath;
public:
Win32FindData(const std::wstring& root, const WIN32_FIND_DATA& data) :
rootPath(root), internalData(data) {};
DWORD GetAttributes() const {
return internalData.dwFileAttributes;
};
bool IsDirectory() const {
return (internalData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0;
};
bool IsFile() const {
return !IsDirectory();
};
unsigned __int64 GetSize() const {
ULARGE_INTEGER intValue;
intValue.LowPart = internalData.nFileSizeLow;
intValue.HighPart = internalData.nFileSizeHigh;
return intValue.QuadPart;
};
std::wstring GetFolderPath() const {
return rootPath;
};
std::wstring GetFileName() const {
return internalData.cFileName;
};
std::wstring GetFullFileName() const {
return rootPath + L"\\" + internalData.cFileName;
};
std::wstring GetShortFileName() const {
return internalData.cAlternateFileName;
};
FILETIME GetCreationTime() const {
return internalData.ftCreationTime;
};
FILETIME GetLastAccessTime() const {
return internalData.ftLastAccessTime;
};
FILETIME GetLastWriteTime() const {
return internalData.ftLastWriteTime;
};
};
template <typename FindXFileFunctions_T>
class BasicEnumerationMethod : public boost::noncopyable {
protected:
WIN32_FIND_DATAW currentData;
HANDLE hFind;
std::wstring currentDirectory;
FindXFileFunctions_T FindFileFunctions;
BasicEnumerationMethod(FindXFileFunctions_T functor) :
hFind(INVALID_HANDLE_VALUE),
FindFileFunctions(functor) {};
void IncrementCurrentDirectory() {
if (hFind == INVALID_HANDLE_VALUE) return;
BOOL success =
FindFileFunctions.FindNext(hFind, ¤tData);
if (success)
return;
DWORD error = GetLastError();
if (error == ERROR_NO_MORE_FILES) {
FindFileFunctions.Close(hFind);
hFind = INVALID_HANDLE_VALUE;
} else {
WindowsApiException::Throw(error);
}
};
virtual ~BasicEnumerationMethod() {
if (hFind != INVALID_HANDLE_VALUE)
FindFileFunctions.Close(hFind);
};
public:
bool equal(const BasicEnumerationMethod<FindXFileFunctions_T>& other) const {
if (this == &other)
return true;
return hFind == other.hFind;
};
Win32FindData dereference() {
return Win32FindData(currentDirectory, currentData);
};
};
template <typename FindXFileFunctions_T>
class BasicNonRecursiveEnumeration : public BasicEnumerationMethod<FindXFileFunctions_T>
{
public:
BasicNonRecursiveEnumeration(FindXFileFunctions_T functor = FindXFileFunctions_T())
: BasicEnumerationMethod<FindXFileFunctions_T>(functor) {};
BasicNonRecursiveEnumeration(const std::wstring& pathSpec,
FindXFileFunctions_T functor = FindXFileFunctions_T())
: BasicEnumerationMethod<FindXFileFunctions_T>(functor) {
std::wstring::const_iterator lastSlash =
std::find(pathSpec.rbegin(), pathSpec.rend(), L'\\').base();
if (lastSlash != pathSpec.begin())
currentDirectory.assign(pathSpec.begin(), lastSlash-1);
hFind = FindFileFunctions.FindFirst(pathSpec.c_str(), ¤tData);
if (hFind == INVALID_HANDLE_VALUE
&& GetLastError() != ERROR_PATH_NOT_FOUND
&& GetLastError() != ERROR_FILE_NOT_FOUND)
WindowsApiException::ThrowFromLastError();
while (hFind != INVALID_HANDLE_VALUE && (!wcscmp(currentData.cFileName, L".") ||
!wcscmp(currentData.cFileName, L".."))) {
IncrementCurrentDirectory();
}
};
void increment() {
IncrementCurrentDirectory();
};
};
typedef BasicNonRecursiveEnumeration<RealFindXFileFunctions> NonRecursiveEnumeration;
template <typename FindXFileFunctions_T>
class BasicRecursiveEnumeration : public BasicEnumerationMethod<FindXFileFunctions_T>
{
//Implementation ommitted
};
typedef BasicRecursiveEnumeration<RealFindXFileFunctions> RecursiveEnumeration;
struct AllResults
{
bool operator()(const Win32FindData&) {
return true;
};
};
struct FilesOnly
{
bool operator()(const Win32FindData& arg) {
return arg.IsFile();
};
};
template <typename Filter_T = AllResults, typename Recurse_T = NonRecursiveEnumeration>
class DirectoryIterator :
public boost::iterator_facade<
DirectoryIterator<Filter_T, Recurse_T>,
Win32FindData,
std::input_iterator_tag,
Win32FindData
>
{
friend class boost::iterator_core_access;
boost::shared_ptr<Recurse_T> impl;
Filter_T filter;
void increment() {
do {
impl->increment();
} while (! filter(impl->dereference()));
};
bool equal(const DirectoryIterator& other) const {
return impl->equal(*other.impl);
};
Win32FindData dereference() const {
return impl->dereference();
};
public:
DirectoryIterator(Filter_T functor = Filter_T()) :
impl(boost::make_shared<Recurse_T>()),
filter(functor) {
};
explicit DirectoryIterator(const std::wstring& pathSpec, Filter_T functor = Filter_T()) :
impl(boost::make_shared<Recurse_T>(pathSpec)),
filter(functor) {
};
};
}}
Тесты для этого класса:
#include <queue>
#include "../WideCharacterOutput.hpp"
#include <boost/test/unit_test.hpp>
#include "../../WindowsAPI++/FileSystem/Enumerator.hpp"
using namespace WindowsAPI::FileSystem;
struct SimpleFakeFindXFileFunctions
{
static std::deque<WIN32_FIND_DATAW> fakeData;
static std::wstring insertedFileName;
HANDLE FindFirst(LPCWSTR lpFileName, LPWIN32_FIND_DATAW lpFindFileData) {
insertedFileName.assign(lpFileName);
if (fakeData.empty()) {
SetLastError(ERROR_PATH_NOT_FOUND);
return INVALID_HANDLE_VALUE;
}
*lpFindFileData = fakeData.front();
fakeData.pop_front();
return reinterpret_cast<HANDLE>(42);
};
BOOL FindNext(HANDLE hFindFile, LPWIN32_FIND_DATAW lpFindFileData) {
BOOST_CHECK_EQUAL(reinterpret_cast<HANDLE>(42), hFindFile);
if (fakeData.empty()) {
SetLastError(ERROR_NO_MORE_FILES);
return 0;
}
*lpFindFileData = fakeData.front();
fakeData.pop_front();
return 1;
};
BOOL Close(HANDLE hFindFile) {
BOOST_CHECK_EQUAL(reinterpret_cast<HANDLE>(42), hFindFile);
return 1;
};
};
std::deque<WIN32_FIND_DATAW> SimpleFakeFindXFileFunctions::fakeData;
std::wstring SimpleFakeFindXFileFunctions::insertedFileName;
struct ErroneousFindXFileFunctions
{
virtual HANDLE FindFirst(LPCWSTR, LPWIN32_FIND_DATAW) {
return reinterpret_cast<HANDLE>(42);
};
virtual BOOL FindNext(HANDLE hFindFile, LPWIN32_FIND_DATAW) {
BOOST_CHECK_EQUAL(reinterpret_cast<HANDLE>(42), hFindFile);
return 1;
};
virtual BOOL Close(HANDLE hFindFile) {
BOOST_CHECK_EQUAL(reinterpret_cast<HANDLE>(42), hFindFile);
return 1;
};
};
struct ErroneousFindXFileFunctionFirst : public ErroneousFindXFileFunctions
{
HANDLE FindFirst(LPCWSTR, LPWIN32_FIND_DATAW) {
SetLastError(ERROR_ACCESS_DENIED);
return INVALID_HANDLE_VALUE;
};
};
struct ErroneousFindXFileFunctionNext : public ErroneousFindXFileFunctions
{
BOOL FindNext(HANDLE hFindFile, LPWIN32_FIND_DATAW) {
BOOST_CHECK_EQUAL(reinterpret_cast<HANDLE>(42), hFindFile);
SetLastError(ERROR_INVALID_PARAMETER);
return 0;
};
};
struct DirectoryIteratorTestsFixture
{
typedef SimpleFakeFindXFileFunctions fakeFunctor;
DirectoryIteratorTestsFixture() {
WIN32_FIND_DATAW test;
wcscpy_s(test.cFileName, L".");
wcscpy_s(test.cAlternateFileName, L".");
test.dwFileAttributes = FILE_ATTRIBUTE_DIRECTORY;
GetSystemTimeAsFileTime(&test.ftCreationTime);
test.ftLastWriteTime = test.ftCreationTime;
test.ftLastAccessTime = test.ftCreationTime;
test.nFileSizeHigh = 0;
test.nFileSizeLow = 0;
fakeFunctor::fakeData.push_back(test);
wcscpy_s(test.cFileName, L"..");
wcscpy_s(test.cAlternateFileName, L"..");
fakeFunctor::fakeData.push_back(test);
wcscpy_s(test.cFileName, L"File.txt");
wcscpy_s(test.cAlternateFileName, L"FILE.TXT");
test.nFileSizeLow = 1024;
test.dwFileAttributes = FILE_ATTRIBUTE_NORMAL;
fakeFunctor::fakeData.push_back(test);
wcscpy_s(test.cFileName, L"System32");
wcscpy_s(test.cAlternateFileName, L"SYSTEM32");
test.nFileSizeLow = 0;
test.dwFileAttributes = FILE_ATTRIBUTE_DIRECTORY;
fakeFunctor::fakeData.push_back(test);
};
~DirectoryIteratorTestsFixture() {
fakeFunctor::fakeData.clear();
};
};
BOOST_FIXTURE_TEST_SUITE( DirectoryIteratorTests, DirectoryIteratorTestsFixture )
BOOST_AUTO_TEST_CASE( BasicEnumeration )
{
typedef DirectoryIterator<AllResults
,BasicNonRecursiveEnumeration<SimpleFakeFindXFileFunctions> > testType;
testType begin(L"C:\\Windows\\*");
testType end;
BOOST_CHECK_EQUAL(fakeFunctor::insertedFileName, L"C:\\Windows\\*");
BOOST_CHECK(begin->GetFolderPath() == L"C:\\Windows");
BOOST_CHECK(begin->GetFileName() == L"File.txt");
BOOST_CHECK(begin->GetFullFileName() == L"C:\\Windows\\File.txt");
BOOST_CHECK(begin->GetShortFileName() == L"FILE.TXT");
BOOST_CHECK_EQUAL(begin->GetSize(), 1024);
BOOST_CHECK(begin->IsFile());
BOOST_CHECK(begin != end);
begin++;
BOOST_CHECK(begin->GetFileName() == L"System32");
BOOST_CHECK(begin->GetFullFileName() == L"C:\\Windows\\System32");
BOOST_CHECK(begin->GetShortFileName() == L"SYSTEM32");
BOOST_CHECK_EQUAL(begin->GetSize(), 0);
BOOST_CHECK(begin->IsDirectory());
begin++;
BOOST_CHECK(begin == end);
}
BOOST_AUTO_TEST_CASE( NoRootDirectories )
{
typedef DirectoryIterator<AllResults
,BasicNonRecursiveEnumeration<SimpleFakeFindXFileFunctions> > testType;
fakeFunctor::fakeData.pop_front();
fakeFunctor::fakeData.pop_front();
testType begin(L"C:\\Windows\\*");
testType end;
BOOST_CHECK_EQUAL(fakeFunctor::insertedFileName, L"C:\\Windows\\*");
BOOST_CHECK(begin->GetFolderPath() == L"C:\\Windows");
BOOST_CHECK(begin->GetFileName() == L"File.txt");
BOOST_CHECK(begin->GetFullFileName() == L"C:\\Windows\\File.txt");
BOOST_CHECK(begin->GetShortFileName() == L"FILE.TXT");
BOOST_CHECK_EQUAL(begin->GetSize(), 1024);
BOOST_CHECK(begin->IsFile());
BOOST_CHECK(begin != end);
begin++;
BOOST_CHECK(begin->GetFileName() == L"System32");
BOOST_CHECK(begin->GetFullFileName() == L"C:\\Windows\\System32");
BOOST_CHECK(begin->GetShortFileName() == L"SYSTEM32");
BOOST_CHECK_EQUAL(begin->GetSize(), 0);
BOOST_CHECK(begin->IsDirectory());
begin++;
BOOST_CHECK(begin == end);
}
BOOST_AUTO_TEST_CASE( Empty1 )
{
fakeFunctor::fakeData.clear();
typedef DirectoryIterator<AllResults
,BasicNonRecursiveEnumeration<SimpleFakeFindXFileFunctions> > testType;
testType begin(L"C:\\Windows\\*");
testType end;
BOOST_CHECK(begin == end);
}
BOOST_AUTO_TEST_CASE( Empty2 )
{
fakeFunctor::fakeData.erase(fakeFunctor::fakeData.begin() + 2, fakeFunctor::fakeData.end());
typedef DirectoryIterator<AllResults
,BasicNonRecursiveEnumeration<SimpleFakeFindXFileFunctions> > testType;
testType begin(L"C:\\Windows\\*");
testType end;
BOOST_CHECK(begin == end);
}
BOOST_AUTO_TEST_CASE( Exceptions )
{
typedef DirectoryIterator<AllResults,BasicNonRecursiveEnumeration<ErroneousFindXFileFunctionFirst> >
firstFailType;
BOOST_CHECK_THROW(firstFailType(L"C:\\Windows\\*"), WindowsAPI::ErrorAccessDeniedException);
typedef DirectoryIterator<AllResults,BasicNonRecursiveEnumeration<ErroneousFindXFileFunctionNext> >
nextFailType;
nextFailType constructedOkay(L"C:\\Windows\\*");
BOOST_CHECK_THROW(constructedOkay++, WindowsAPI::ErrorInvalidParameterException);
}
BOOST_AUTO_TEST_CASE( CorrectDestruction )
{
typedef DirectoryIterator<AllResults
,BasicNonRecursiveEnumeration<SimpleFakeFindXFileFunctions> > testType;
testType begin(L"C:\\Windows\\*");
testType end;
BOOST_CHECK(begin != end);
}
BOOST_AUTO_TEST_SUITE_END()