2008-07-04 00:38:12 +02:00
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Google C++ Testing Framework
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============================
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2010-04-14 07:34:38 +02:00
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2008-07-04 00:38:12 +02:00
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http://code.google.com/p/googletest/
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Overview
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--------
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2010-04-14 07:34:38 +02:00
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Google's framework for writing C++ tests on a variety of platforms
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(Linux, Mac OS X, Windows, Windows CE, Symbian, etc). Based on the
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xUnit architecture. Supports automatic test discovery, a rich set of
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assertions, user-defined assertions, death tests, fatal and non-fatal
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failures, various options for running the tests, and XML test report
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generation.
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Please see the project page above for more information as well as the
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mailing list for questions, discussions, and development. There is
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also an IRC channel on OFTC (irc.oftc.net) #gtest available. Please
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join us!
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Requirements for End Users
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--------------------------
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2008-11-17 23:57:44 +01:00
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Google Test is designed to have fairly minimal requirements to build
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2010-04-14 07:34:38 +02:00
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and use with your projects, but there are some. Currently, we support
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Linux, Windows, Mac OS X, and Cygwin. We will also make our best
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effort to support other platforms (e.g. Solaris, AIX, and z/OS).
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However, since core members of the Google Test project have no access
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to these platforms, Google Test may have outstanding issues there. If
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you notice any problems on your platform, please notify
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googletestframework@googlegroups.com. Patches for fixing them are
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even more welcome!
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2008-07-04 00:38:12 +02:00
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### Linux Requirements ###
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2008-07-04 00:38:12 +02:00
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These are the base requirements to build and use Google Test from a source
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package (as described below):
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* GNU-compatible Make or gmake
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* POSIX-standard shell
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* POSIX(-2) Regular Expressions (regex.h)
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* A C++98-standard-compliant compiler
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2008-07-09 22:58:26 +02:00
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### Windows Requirements ###
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* Microsoft Visual C++ 7.1 or newer
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### Cygwin Requirements ###
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2008-07-09 22:58:26 +02:00
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* Cygwin 1.5.25-14 or newer
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### Mac OS X Requirements ###
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2008-07-09 22:58:26 +02:00
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* Mac OS X 10.4 Tiger or newer
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* Developer Tools Installed
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Also, you'll need CMake 2.6.4 or higher if you want to build the
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samples using the provided CMake script, regardless of the platform.
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Requirements for Contributors
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-----------------------------
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We welcome patches. If you plan to contribute a patch, you need to
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build Google Test and its own tests from an SVN checkout (described
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below), which has further requirements:
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* Python version 2.3 or newer (for running some of the tests and
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re-generating certain source files from templates)
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* CMake 2.6.4 or newer
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2008-07-04 00:38:12 +02:00
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Getting the Source
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------------------
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There are two primary ways of getting Google Test's source code: you
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can download a stable source release in your preferred archive format,
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or directly check out the source from our Subversion (SVN) repositary.
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The SVN checkout requires a few extra steps and some extra software
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packages on your system, but lets you track the latest development and
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make patches much more easily, so we highly encourage it.
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### Source Package ###
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Google Test is released in versioned source packages which can be
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downloaded from the download page [1]. Several different archive
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formats are provided, but the only difference is the tools used to
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manipulate them, and the size of the resulting file. Download
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whichever you are most comfortable with.
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[1] http://code.google.com/p/googletest/downloads/list
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Once the package is downloaded, expand it using whichever tools you
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prefer for that type. This will result in a new directory with the
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name "gtest-X.Y.Z" which contains all of the source code. Here are
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some examples on Linux:
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tar -xvzf gtest-X.Y.Z.tar.gz
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tar -xvjf gtest-X.Y.Z.tar.bz2
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unzip gtest-X.Y.Z.zip
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### SVN Checkout ###
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To check out the main branch (also known as the "trunk") of Google
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Test, run the following Subversion command:
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2008-12-11 06:32:22 +01:00
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svn checkout http://googletest.googlecode.com/svn/trunk/ gtest-svn
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Setting up the Build
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--------------------
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2008-07-04 00:38:12 +02:00
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2010-04-14 07:34:38 +02:00
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To build Google Test and your tests that use it, you need to tell your
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build system where to find its headers and source files. The exact
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way to do it depends on which build system you use, and is usually
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straightforward.
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2008-07-04 00:38:12 +02:00
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2010-04-14 07:34:38 +02:00
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### Generic Build Instructions ###
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2010-04-14 07:34:38 +02:00
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Suppose you put Google Test in directory ${GTEST_DIR}. To build it,
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create a library build target (or a project as called by Visual Studio
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and Xcode) to compile
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${GTEST_DIR}/src/gtest-all.cc
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with
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${GTEST_DIR}/include and ${GTEST_DIR}
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in the header search path. Assuming a Linux-like system and gcc,
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something like the following will do:
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g++ -I${GTEST_DIR}/include -I${GTEST_DIR} -c ${GTEST_DIR}/src/gtest-all.cc
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ar -rv libgtest.a gtest-all.o
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2010-04-14 07:34:38 +02:00
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Next, you should compile your test source file with
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${GTEST_DIR}/include in the header search path, and link it with gtest
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and any other necessary libraries:
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g++ -I${GTEST_DIR}/include path/to/your_test.cc libgtest.a -o your_test
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2010-04-14 07:34:38 +02:00
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As an example, the make/ directory contains a Makefile that you can
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use to build Google Test on systems where GNU make is available
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(e.g. Linux, Mac OS X, and Cygwin). It doesn't try to build Google
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Test's own tests. Instead, it just builds the Google Test library and
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a sample test. You can use it as a starting point for your own build
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script.
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If the default settings are correct for your environment, the
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following commands should succeed:
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cd ${GTEST_DIR}/make
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make
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./sample1_unittest
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If you see errors, try to tweak the contents of make/Makefile to make
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them go away. There are instructions in make/Makefile on how to do
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it.
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### Using CMake ###
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Google Test comes with a CMake build script (CMakeLists.txt) that can
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be used on a wide range of platforms ("C" stands for cross-platofrm.).
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If you don't have CMake installed already, you can download it for
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free from http://www.cmake.org/.
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CMake works by generating native makefiles or build projects that can
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be used in the compiler environment of your choice. The typical
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workflow starts with:
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mkdir mybuild # Create a directory to hold the build output.
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cd mybuild
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cmake ${GTEST_DIR} # Generate native build scripts.
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If you want to build Google Test's samples, you should replace the
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last command with
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2010-05-11 11:37:33 +02:00
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cmake -Dgtest_build_samples=ON ${GTEST_DIR}
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If you are on a *nix system, you should now see a Makefile in the
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current directory. Just type 'make' to build gtest.
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If you use Windows and have Vistual Studio installed, a gtest.sln file
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and several .vcproj files will be created. You can then build them
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using Visual Studio.
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On Mac OS X with Xcode installed, a .xcodeproj file will be generated.
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### Legacy Build Scripts ###
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Before settling on CMake, we have been providing hand-maintained build
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projects/scripts for Visual Studio, Xcode, and Autotools. While we
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continue to provide them for convenience, they are not actively
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maintained any more. We highly recommend that you follow the
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instructions in the previous two sections to integrate Google Test
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with your existing build system.
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If you still need to use the legacy build scripts, here's how:
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The msvc\ folder contains two solutions with Visual C++ projects.
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Open the gtest.sln or gtest-md.sln file using Visual Studio, and you
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are ready to build Google Test the same way you build any Visual
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Studio project. Files that have names ending with -md use DLL
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versions of Microsoft runtime libraries (the /MD or the /MDd compiler
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option). Files without that suffix use static versions of the runtime
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libraries (the /MT or the /MTd option). Please note that one must use
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the same option to compile both gtest and the test code. If you use
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Visual Studio 2005 or above, we recommend the -md version as /MD is
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the default for new projects in these versions of Visual Studio.
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On Mac OS X, open the gtest.xcodeproj in the xcode/ folder using
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Xcode. Build the "gtest" target. The universal binary framework will
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end up in your selected build directory (selected in the Xcode
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"Preferences..." -> "Building" pane and defaults to xcode/build).
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Alternatively, at the command line, enter:
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xcodebuild
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This will build the "Release" configuration of gtest.framework in your
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default build location. See the "xcodebuild" man page for more
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information about building different configurations and building in
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different locations.
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Tweaking Google Test
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--------------------
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Google Test can be used in diverse environments. The default
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configuration may not work (or may not work well) out of the box in
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some environments. However, you can easily tweak Google Test by
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defining control macros on the compiler command line. Generally,
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these macros are named like GTEST_XYZ and you define them to either 1
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or 0 to enable or disable a certain feature.
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We list the most frequently used macros below. For a complete list,
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see file include/gtest/internal/gtest-port.h.
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### Choosing a TR1 Tuple Library ###
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2009-06-17 23:06:27 +02:00
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Some Google Test features require the C++ Technical Report 1 (TR1)
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tuple library, which is not yet available with all compilers. The
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good news is that Google Test implements a subset of TR1 tuple that's
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enough for its own need, and will automatically use this when the
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compiler doesn't provide TR1 tuple.
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Usually you don't need to care about which tuple library Google Test
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uses. However, if your project already uses TR1 tuple, you need to
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tell Google Test to use the same TR1 tuple library the rest of your
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project uses, or the two tuple implementations will clash. To do
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that, add
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-DGTEST_USE_OWN_TR1_TUPLE=0
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2010-04-14 07:34:38 +02:00
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to the compiler flags while compiling Google Test and your tests. If
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you want to force Google Test to use its own tuple library, just add
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-DGTEST_USE_OWN_TR1_TUPLE=1
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to the compiler flags instead.
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If you don't want Google Test to use tuple at all, add
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-DGTEST_HAS_TR1_TUPLE=0
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and all features using tuple will be disabled.
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### Multi-threaded Tests ###
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Google Test is thread-safe where the pthread library is available.
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After #include "gtest/gtest.h", you can check the GTEST_IS_THREADSAFE
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macro to see whether this is the case (yes if the macro is #defined to
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1, no if it's undefined.).
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2010-04-14 07:34:38 +02:00
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If Google Test doesn't correctly detect whether pthread is available
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in your environment, you can force it with
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-DGTEST_HAS_PTHREAD=1
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or
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-DGTEST_HAS_PTHREAD=0
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When Google Test uses pthread, you may need to add flags to your
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compiler and/or linker to select the pthread library, or you'll get
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link errors. If you use the CMake script or the deprecated Autotools
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script, this is taken care of for you. If you use your own build
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script, you'll need to read your compiler and linker's manual to
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figure out what flags to add.
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### As a Shared Library (DLL) ###
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Google Test is compact, so most users can build and link it as a
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static library for the simplicity. You can choose to use Google Test
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as a shared library (known as a DLL on Windows) if you prefer.
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2010-09-28 23:28:24 +02:00
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To compile *gtest* as a shared library, add
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-DGTEST_CREATE_SHARED_LIBRARY=1
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2010-04-14 07:34:38 +02:00
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to the compiler flags. You'll also need to tell the linker to produce
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a shared library instead - consult your linker's manual for how to do
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it.
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2010-09-28 23:28:24 +02:00
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To compile your *tests* that use the gtest shared library, add
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-DGTEST_LINKED_AS_SHARED_LIBRARY=1
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to the compiler flags.
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2010-09-28 23:28:24 +02:00
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Note: while the above steps aren't technically necessary today when
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using some compilers (e.g. GCC), they may become necessary in the
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future, if we decide to improve the speed of loading the library (see
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http://gcc.gnu.org/wiki/Visibility for details). Therefore you are
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recommended to always add the above flags when using Google Test as a
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shared library. Otherwise a future release of Google Test may break
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your build script.
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2010-04-14 07:34:38 +02:00
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### Avoiding Macro Name Clashes ###
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2008-10-08 22:24:46 +02:00
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2010-04-14 07:34:38 +02:00
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In C++, macros don't obey namespaces. Therefore two libraries that
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both define a macro of the same name will clash if you #include both
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definitions. In case a Google Test macro clashes with another
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library, you can force Google Test to rename its macro to avoid the
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conflict.
|
2009-08-29 00:11:18 +02:00
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2010-04-14 07:34:38 +02:00
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Specifically, if both Google Test and some other code define macro
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FOO, you can add
|
2008-07-25 02:54:56 +02:00
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2010-04-14 07:34:38 +02:00
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-DGTEST_DONT_DEFINE_FOO=1
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2008-12-02 20:52:48 +01:00
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2010-04-14 07:34:38 +02:00
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to the compiler flags to tell Google Test to change the macro's name
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from FOO to GTEST_FOO. Currently FOO can be FAIL, SUCCEED, or TEST.
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For example, with -DGTEST_DONT_DEFINE_TEST=1, you'll need to write
|
2008-12-02 20:52:48 +01:00
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2010-04-14 07:34:38 +02:00
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GTEST_TEST(SomeTest, DoesThis) { ... }
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2008-12-02 20:52:48 +01:00
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2010-04-14 07:34:38 +02:00
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instead of
|
2008-12-02 20:52:48 +01:00
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2010-04-14 07:34:38 +02:00
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TEST(SomeTest, DoesThis) { ... }
|
2008-11-17 23:57:44 +01:00
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2010-04-14 07:34:38 +02:00
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in order to define a test.
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|
Upgrating from an Earlier Version
|
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|
---------------------------------
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We strive to keep Google Test releases backward compatible.
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Sometimes, though, we have to make some breaking changes for the
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|
users' long-term benefits. This section describes what you'll need to
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|
do if you are upgrading from an earlier version of Google Test.
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|
### Upgrading from 1.3.0 or Earlier ###
|
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You may need to explicitly enable or disable Google Test's own TR1
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|
tuple library. See the instructions in section "Choosing a TR1 Tuple
|
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|
Library".
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|
|
|
|
|
|
### Upgrading from 1.4.0 or Earlier ###
|
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|
The Autotools build script (configure + make) is no longer officially
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|
supportted. You are encouraged to migrate to your own build system or
|
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|
use CMake. If you still need to use Autotools, you can find
|
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|
|
instructions in the README file from Google Test 1.4.0.
|
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|
|
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|
On platforms where the pthread library is available, Google Test uses
|
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|
|
it in order to be thread-safe. See the "Multi-threaded Tests" section
|
|
|
|
for what this means to your build script.
|
|
|
|
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|
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.
|
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|
|
Developing Google Test
|
|
|
|
----------------------
|
|
|
|
|
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|
|
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
|
2010-05-11 11:37:33 +02:00
|
|
|
cmake -Dgtest_build_tests=ON ${GTEST_DIR}
|
2010-04-14 07:34:38 +02:00
|
|
|
|
|
|
|
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:
|
|
|
|
|
2010-05-11 11:37:33 +02:00
|
|
|
cmake -DPYTHON_EXECUTABLE=path/to/python -Dgtest_build_tests=ON ${GTEST_DIR}
|
2010-04-14 07:34:38 +02:00
|
|
|
|
|
|
|
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 ###
|
2008-11-17 23:57:44 +01:00
|
|
|
|
2008-09-08 19:55:52 +02:00
|
|
|
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,
|
2010-04-14 07:34:38 +02:00
|
|
|
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
|
2008-09-08 19:55:52 +02:00
|
|
|
|
2008-07-04 00:38:12 +02:00
|
|
|
Happy testing!
|