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diff --git a/tests/gtest/README b/tests/gtest/README new file mode 100644 index 000000000..404bf3b83 --- /dev/null +++ b/tests/gtest/README @@ -0,0 +1,435 @@ +Google C++ Testing Framework +============================ + +http://code.google.com/p/googletest/ + +Overview +-------- + +Google's framework for writing C++ tests on a variety of platforms +(Linux, Mac OS X, Windows, Windows CE, Symbian, etc). Based on the +xUnit architecture. Supports automatic test discovery, a rich set of +assertions, user-defined assertions, death tests, fatal and non-fatal +failures, various options for running the tests, and XML test report +generation. + +Please see the project page above for more information as well as the +mailing list for questions, discussions, and development. There is +also an IRC channel on OFTC (irc.oftc.net) #gtest available. Please +join us! + +Requirements for End Users +-------------------------- + +Google Test is designed to have fairly minimal requirements to build +and use with your projects, but there are some. Currently, we support +Linux, Windows, Mac OS X, and Cygwin. We will also make our best +effort to support other platforms (e.g. Solaris, AIX, and z/OS). +However, since core members of the Google Test project have no access +to these platforms, Google Test may have outstanding issues there. If +you notice any problems on your platform, please notify +googletestframework@googlegroups.com. Patches for fixing them are +even more welcome! + +### Linux Requirements ### + +These are the base requirements to build and use Google Test from a source +package (as described below): + * GNU-compatible Make or gmake + * POSIX-standard shell + * POSIX(-2) Regular Expressions (regex.h) + * A C++98-standard-compliant compiler + +### Windows Requirements ### + + * Microsoft Visual C++ 7.1 or newer + +### Cygwin Requirements ### + + * Cygwin 1.5.25-14 or newer + +### Mac OS X Requirements ### + + * Mac OS X 10.4 Tiger or newer + * Developer Tools Installed + +Also, you'll need CMake 2.6.4 or higher if you want to build the +samples using the provided CMake script, regardless of the platform. + +Requirements for Contributors +----------------------------- + +We welcome patches. If you plan to contribute a patch, you need to +build Google Test and its own tests from an SVN checkout (described +below), which has further requirements: + + * Python version 2.3 or newer (for running some of the tests and + re-generating certain source files from templates) + * CMake 2.6.4 or newer + +Getting the Source +------------------ + +There are two primary ways of getting Google Test's source code: you +can download a stable source release in your preferred archive format, +or directly check out the source from our Subversion (SVN) repository. +The SVN checkout requires a few extra steps and some extra software +packages on your system, but lets you track the latest development and +make patches much more easily, so we highly encourage it. + +### Source Package ### + +Google Test is released in versioned source packages which can be +downloaded from the download page [1]. Several different archive +formats are provided, but the only difference is the tools used to +manipulate them, and the size of the resulting file. Download +whichever you are most comfortable with. + + [1] http://code.google.com/p/googletest/downloads/list + +Once the package is downloaded, expand it using whichever tools you +prefer for that type. This will result in a new directory with the +name "gtest-X.Y.Z" which contains all of the source code. Here are +some examples on Linux: + + tar -xvzf gtest-X.Y.Z.tar.gz + tar -xvjf gtest-X.Y.Z.tar.bz2 + unzip gtest-X.Y.Z.zip + +### SVN Checkout ### + +To check out the main branch (also known as the "trunk") of Google +Test, run the following Subversion command: + + svn checkout http://googletest.googlecode.com/svn/trunk/ gtest-svn + +Setting up the Build +-------------------- + +To build Google Test and your tests that use it, you need to tell your +build system where to find its headers and source files. The exact +way to do it depends on which build system you use, and is usually +straightforward. + +### Generic Build Instructions ### + +Suppose you put Google Test in directory ${GTEST_DIR}. To build it, +create a library build target (or a project as called by Visual Studio +and Xcode) to compile + + ${GTEST_DIR}/src/gtest-all.cc + +with ${GTEST_DIR}/include in the system header search path and ${GTEST_DIR} +in the normal header search path. Assuming a Linux-like system and gcc, +something like the following will do: + + g++ -isystem ${GTEST_DIR}/include -I${GTEST_DIR} \ + -pthread -c ${GTEST_DIR}/src/gtest-all.cc + ar -rv libgtest.a gtest-all.o + +(We need -pthread as Google Test uses threads.) + +Next, you should compile your test source file with +${GTEST_DIR}/include in the system header search path, and link it +with gtest and any other necessary libraries: + + g++ -isystem ${GTEST_DIR}/include -pthread path/to/your_test.cc libgtest.a \ + -o your_test + +As an example, the make/ directory contains a Makefile that you can +use to build Google Test on systems where GNU make is available +(e.g. Linux, Mac OS X, and Cygwin). It doesn't try to build Google +Test's own tests. Instead, it just builds the Google Test library and +a sample test. You can use it as a starting point for your own build +script. + +If the default settings are correct for your environment, the +following commands should succeed: + + cd ${GTEST_DIR}/make + make + ./sample1_unittest + +If you see errors, try to tweak the contents of make/Makefile to make +them go away. There are instructions in make/Makefile on how to do +it. + +### Using CMake ### + +Google Test comes with a CMake build script (CMakeLists.txt) that can +be used on a wide range of platforms ("C" stands for cross-platform.). +If you don't have CMake installed already, you can download it for +free from http://www.cmake.org/. + +CMake works by generating native makefiles or build projects that can +be used in the compiler environment of your choice. The typical +workflow starts with: + + mkdir mybuild # Create a directory to hold the build output. + cd mybuild + cmake ${GTEST_DIR} # Generate native build scripts. + +If you want to build Google Test's samples, you should replace the +last command with + + cmake -Dgtest_build_samples=ON ${GTEST_DIR} + +If you are on a *nix system, you should now see a Makefile in the +current directory. Just type 'make' to build gtest. + +If you use Windows and have Visual Studio installed, a gtest.sln file +and several .vcproj files will be created. You can then build them +using Visual Studio. + +On Mac OS X with Xcode installed, a .xcodeproj file will be generated. + +### Legacy Build Scripts ### + +Before settling on CMake, we have been providing hand-maintained build +projects/scripts for Visual Studio, Xcode, and Autotools. While we +continue to provide them for convenience, they are not actively +maintained any more. We highly recommend that you follow the +instructions in the previous two sections to integrate Google Test +with your existing build system. + +If you still need to use the legacy build scripts, here's how: + +The msvc\ folder contains two solutions with Visual C++ projects. +Open the gtest.sln or gtest-md.sln file using Visual Studio, and you +are ready to build Google Test the same way you build any Visual +Studio project. Files that have names ending with -md use DLL +versions of Microsoft runtime libraries (the /MD or the /MDd compiler +option). Files without that suffix use static versions of the runtime +libraries (the /MT or the /MTd option). Please note that one must use +the same option to compile both gtest and the test code. If you use +Visual Studio 2005 or above, we recommend the -md version as /MD is +the default for new projects in these versions of Visual Studio. + +On Mac OS X, open the gtest.xcodeproj in the xcode/ folder using +Xcode. Build the "gtest" target. The universal binary framework will +end up in your selected build directory (selected in the Xcode +"Preferences..." -> "Building" pane and defaults to xcode/build). +Alternatively, at the command line, enter: + + xcodebuild + +This will build the "Release" configuration of gtest.framework in your +default build location. See the "xcodebuild" man page for more +information about building different configurations and building in +different locations. + +If you wish to use the Google Test Xcode project with Xcode 4.x and +above, you need to either: + * update the SDK configuration options in xcode/Config/General.xconfig. + Comment options SDKROOT, MACOS_DEPLOYMENT_TARGET, and GCC_VERSION. If + you choose this route you lose the ability to target earlier versions + of MacOS X. + * Install an SDK for an earlier version. This doesn't appear to be + supported by Apple, but has been reported to work + (http://stackoverflow.com/questions/5378518). + +Tweaking Google Test +-------------------- + +Google Test can be used in diverse environments. The default +configuration may not work (or may not work well) out of the box in +some environments. However, you can easily tweak Google Test by +defining control macros on the compiler command line. Generally, +these macros are named like GTEST_XYZ and you define them to either 1 +or 0 to enable or disable a certain feature. + +We list the most frequently used macros below. For a complete list, +see file include/gtest/internal/gtest-port.h. + +### Choosing a TR1 Tuple Library ### + +Some Google Test features require the C++ Technical Report 1 (TR1) +tuple library, which is not yet available with all compilers. The +good news is that Google Test implements a subset of TR1 tuple that's +enough for its own need, and will automatically use this when the +compiler doesn't provide TR1 tuple. + +Usually you don't need to care about which tuple library Google Test +uses. However, if your project already uses TR1 tuple, you need to +tell Google Test to use the same TR1 tuple library the rest of your +project uses, or the two tuple implementations will clash. To do +that, add + + -DGTEST_USE_OWN_TR1_TUPLE=0 + +to the compiler flags while compiling Google Test and your tests. If +you want to force Google Test to use its own tuple library, just add + + -DGTEST_USE_OWN_TR1_TUPLE=1 + +to the compiler flags instead. + +If you don't want Google Test to use tuple at all, add + + -DGTEST_HAS_TR1_TUPLE=0 + +and all features using tuple will be disabled. + +### Multi-threaded Tests ### + +Google Test is thread-safe where the pthread library is available. +After #include "gtest/gtest.h", you can check the GTEST_IS_THREADSAFE +macro to see whether this is the case (yes if the macro is #defined to +1, no if it's undefined.). + +If Google Test doesn't correctly detect whether pthread is available +in your environment, you can force it with + + -DGTEST_HAS_PTHREAD=1 + +or + + -DGTEST_HAS_PTHREAD=0 + +When Google Test uses pthread, you may need to add flags to your +compiler and/or linker to select the pthread library, or you'll get +link errors. If you use the CMake script or the deprecated Autotools +script, this is taken care of for you. If you use your own build +script, you'll need to read your compiler and linker's manual to +figure out what flags to add. + +### As a Shared Library (DLL) ### + +Google Test is compact, so most users can build and link it as a +static library for the simplicity. You can choose to use Google Test +as a shared library (known as a DLL on Windows) if you prefer. + +To compile *gtest* as a shared library, add + + -DGTEST_CREATE_SHARED_LIBRARY=1 + +to the compiler flags. You'll also need to tell the linker to produce +a shared library instead - consult your linker's manual for how to do +it. + +To compile your *tests* that use the gtest shared library, add + + -DGTEST_LINKED_AS_SHARED_LIBRARY=1 + +to the compiler flags. + +Note: while the above steps aren't technically necessary today when +using some compilers (e.g. GCC), they may become necessary in the +future, if we decide to improve the speed of loading the library (see +http://gcc.gnu.org/wiki/Visibility for details). Therefore you are +recommended to always add the above flags when using Google Test as a +shared library. Otherwise a future release of Google Test may break +your build script. + +### Avoiding Macro Name Clashes ### + +In C++, macros don't obey namespaces. Therefore two libraries that +both define a macro of the same name will clash if you #include both +definitions. In case a Google Test macro clashes with another +library, you can force Google Test to rename its macro to avoid the +conflict. + +Specifically, if both Google Test and some other code define macro +FOO, you can add + + -DGTEST_DONT_DEFINE_FOO=1 + +to the compiler flags to tell Google Test to change the macro's name +from FOO to GTEST_FOO. Currently FOO can be FAIL, SUCCEED, or TEST. +For example, with -DGTEST_DONT_DEFINE_TEST=1, you'll need to write + + GTEST_TEST(SomeTest, DoesThis) { ... } + +instead of + + TEST(SomeTest, DoesThis) { ... } + +in order to define a test. + +Upgrating from an Earlier Version +--------------------------------- + +We strive to keep Google Test releases backward compatible. +Sometimes, though, we have to make some breaking changes for the +users' long-term benefits. This section describes what you'll need to +do if you are upgrading from an earlier version of Google Test. + +### Upgrading from 1.3.0 or Earlier ### + +You may need to explicitly enable or disable Google Test's own TR1 +tuple library. See the instructions in section "Choosing a TR1 Tuple +Library". + +### Upgrading from 1.4.0 or Earlier ### + +The Autotools build script (configure + make) is no longer officially +supportted. You are encouraged to migrate to your own build system or +use CMake. If you still need to use Autotools, you can find +instructions in the README file from Google Test 1.4.0. + +On platforms where the pthread library is available, Google Test uses +it in order to be thread-safe. See the "Multi-threaded Tests" section +for what this means to your build script. + +If you use Microsoft Visual C++ 7.1 with exceptions disabled, Google +Test will no longer compile. This should affect very few people, as a +large portion of STL (including <string>) doesn't compile in this mode +anyway. We decided to stop supporting it in order to greatly simplify +Google Test's implementation. + +Developing Google Test +---------------------- + +This section discusses how to make your own changes to Google Test. + +### Testing Google Test Itself ### + +To make sure your changes work as intended and don't break existing +functionality, you'll want to compile and run Google Test's own tests. +For that you can use CMake: + + mkdir mybuild + cd mybuild + cmake -Dgtest_build_tests=ON ${GTEST_DIR} + +Make sure you have Python installed, as some of Google Test's tests +are written in Python. If the cmake command complains about not being +able to find Python ("Could NOT find PythonInterp (missing: +PYTHON_EXECUTABLE)"), try telling it explicitly where your Python +executable can be found: + + cmake -DPYTHON_EXECUTABLE=path/to/python -Dgtest_build_tests=ON ${GTEST_DIR} + +Next, you can build Google Test and all of its own tests. On *nix, +this is usually done by 'make'. To run the tests, do + + make test + +All tests should pass. + +### Regenerating Source Files ### + +Some of Google Test's source files are generated from templates (not +in the C++ sense) using a script. A template file is named FOO.pump, +where FOO is the name of the file it will generate. For example, the +file include/gtest/internal/gtest-type-util.h.pump is used to generate +gtest-type-util.h in the same directory. + +Normally you don't need to worry about regenerating the source files, +unless you need to modify them. In that case, you should modify the +corresponding .pump files instead and run the pump.py Python script to +regenerate them. You can find pump.py in the scripts/ directory. +Read the Pump manual [2] for how to use it. + + [2] http://code.google.com/p/googletest/wiki/PumpManual + +### Contributing a Patch ### + +We welcome patches. Please read the Google Test developer's guide [3] +for how you can contribute. In particular, make sure you have signed +the Contributor License Agreement, or we won't be able to accept the +patch. + + [3] http://code.google.com/p/googletest/wiki/GoogleTestDevGuide + +Happy testing! |