CMake/Testing With CTest: Difference between revisions

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==Dashboards==
==Dashboards==


Testing Dashboards are web pages that display overview of the project testing.
The next step is to not only execute the tests, but to log their results
The testing clients update, configure, and build the project, as well as run
and provide them in such a way that they could be reviewed easily.
some number of tests. The results of these operations are then submitted to the
central server, which prepares the overview pages. Examples of Testing
Dashboards are:
[http://www.vtk.org/Testing/Dashboard/MostRecentResults-Nightly/Dashboard.html VTK],
[http://www.itk.org/Testing/Dashboard/MostRecentResults-Nightly/Dashboard.html ITK], and
[http://www.paraview.org/Testing/Dashboard/MostRecentResults-Nightly/Dashboard.html ParaView].
More dashboards can be found on [http://www.cdash.org/CDash/index.php www.cdash.org] and [http://my.cdash.org my.cdash.org].


There are three types of dashboard submissions. Experimental submission is
The result of a test run, reformatted for easy review, is called a
submission of the current state of the project. It can be performed at any time
"dashboard". A dashboard can be submitted to a central server, like CDash:
and will appear on the dashboard on the next roll-up. Nightly submission is
similar to experimental, except that the extra update will be performed using
the last nightly time. This way all nightly dashboard submissions correspond to
the state of the project at the same point in time. Finally, Continuous
submissions are similar to Experimental submissions, except that an update is
performed and if any files were modified, the full dashboard testing is
performed.


===Dashboard Preparation Using CMake===
* [http://www.cdash.org/CDash/index.php www.cdash.org] and
* [http://my.cdash.org my.cdash.org].


To enable submission to Dart Testing Dashboard, include the following in
There are three types of dashboard submissions:
CMakeLists.txt:


INCLUDE(CTest)
* '''Experimental''' means the current state of the project. An experimental
  submission can be performed at any time, usually interactively from the
  current working copy of a developer.


When you include the '''CTest''' module, it will give you an option ''BUILD_TESTING'', which is enabled by default.
* '''Nightly''' is similar to experimental, except that the source tree will
In this case it will setup everything required for testing and also call ENABLE_TESTING(), so you don't have to do this in your cmake files.
  be set to the state it was in at a specific nightly time. This ensures that
  all "nightly" submissions correspond to the state of the project at the same
  point in time. "Nightly" builds are usually done automatically at a preset
  time of day.


By default the settings will be to submit to [http://www.kitware.com Kitware's]
* '''Continuous''' means that the source tree is updated to the latest revision,
[http://public.kitware.com/Public/Dashboard/MostRecentResults-Nightly/Dashboard.html Public Dashboard]. In order to submit
  and a build / test cycle is performed only if any files were actually updated.
to some other dashboard, create a file "CTestConfig.cmake" in the toplevel source directory and set the dashboard preferences.
  Like "Nightly" builds, "Continuous" ones are usually done automatically and
Instead of manually creating this file you can also download a project specific CTestConfig.cmake from the respective project page on CDash.
  repeatedly in intervals.


'''CTestConfig.cmake''' file is not necessary if all you want is to submit to the [http://public.kitware.com/Public/Dashboard/MostRecentResults-Nightly/Dashboard.html '''Public Dashboard'''].
===Dashboard Preparation===


Example of this file is:
To enable the creation and submission of dashboards, add the following to your
<tt>CMakeLists.txt</tt>:


<pre>
    include( CTest )
# Dashboard is opened for submissions for a 24 hour period starting at
 
# the specified NIGHLY_START_TIME. Time is specified in 24 hour format.
This module will automatically call <tt>enable_testing()</tt> (see above), so
SET (CTEST_NIGHTLY_START_TIME "23:00:00 EDT")
you no longer have to do so in your CMake files. It will also add several new
targets to your build.
 
* The three main targets:
** Experimental
** Nightly
** Continuous
* For each of the above, targets for the intermediate steps
** ...Start
** ...Update
** ...Configure
** ...Build
** ...Submit
** ...Test
** ...Coverage
** ...MemCheck
** ...Submit


# Dart server to submit results (used by client)
The intermediate targets are created so you could submit partial test
IF(CTEST_DROP_METHOD MATCHES http)
results, or inspect the results before submitting (or continuing with
  SET (CTEST_DROP_SITE "public.kitware.com")
more time-consuming steps like MemCheck).
  SET (CTEST_DROP_LOCATION "/cgi-bin/HTTPUploadDartFile.cgi")
ELSE(CTEST_DROP_METHOD MATCHES http)
  SET (CTEST_DROP_SITE "public.kitware.com")
  SET (CTEST_DROP_LOCATION "/incoming")
  SET (CTEST_DROP_SITE_USER "ftpuser")
  SET (CTEST_DROP_SITE_PASSWORD "public")
ENDIF(CTEST_DROP_METHOD MATCHES http)


SET (CTEST_TRIGGER_SITE
All this can be disabled by setting the option <tt>BUILD_TESTING</tt> (which
      "http://${DROP_SITE}/cgi-bin/Submit-vtk-TestingResults.pl")
is also added by the CTest module and enabled by default) to OFF / false.
</pre>


This will submit testing results to the
The default settings of the module are to submit the dashboard to
[http://www.vtk.org/Testing/Dashboard/MostRecentResults-Nightly/Dashboard.html VTK dashboard].
[http://www.kitware.com Kitware's]
[http://public.kitware.com/Public/Dashboard/MostRecentResults-Nightly/Dashboard.html Public Dashboard],
where you can register your project for free.


===CTest - Client for Dart Dashboard Server===
In order to submit to some other server, "CTestConfig.cmake" in the top level
directory of your source, and set your own dashboard preferences. If you are
using a CDash server, you can download a preconfigured file from the respective
project page on that server ("Settings" / "Project", tab "Miscellaneous").


CTest started as a simple tool to run some number of tests in the project, but
An example of a CTestConfig.cmake:
has evolved in the full ''Dart'' compatible client. It can perform simple task
of running a set of tests but it can also generate and submit Dart compatible
Dashboard results. The good thing about CTest is that it is self sustained. All
you need to do testing is CTest. Also, if you use CMake, you already have
CTest. Detailed description of CTest option can be seen by running:


ctest --help
<pre>
## This file should be placed in the root directory of your project.
or
## Then modify the CMakeLists.txt file in the root directory of your
## project to incorporate the testing dashboard.
## # The following are required to uses Dart and the Cdash dashboard
##  ENABLE_TESTING()
##  INCLUDE(CTest)
set(CTEST_PROJECT_NAME "MyProject")
set(CTEST_NIGHTLY_START_TIME "01:00:00 UTC")


ctest --help-full
set(CTEST_DROP_METHOD "http")
set(CTEST_DROP_SITE "cdash.example.com")
set(CTEST_DROP_LOCATION "/cdash/submit.php?project=MyProject")
set(CTEST_DROP_SITE_CDASH TRUE)
</pre>


A simple way to submit Experimental dashboard is:
===Dashboard Creation===


ctest -D Experimental
Once you have the above in place, you can build one of the targets added
by the CTest module you included. Internally, this calls the CTest command
line client, which you could also call directly instead:


This will configure project, build project and check for any warnings or
    ctest -D Experimental
errors, run tests if any tests are specified, run coverage if any coverage
files are specified, and submit to the specified ''Dart'' server.


To convert existing Dart Client run from the project, find lines like:
A detailed description of CTest options can be seen by running:


<pre>
    ctest --help
cd ProjectNightlyBuildDirectory
tclsh /location/of/Dart/Source/Client/DashboardManager.tcl DartConfiguration.tcl \
Nightly Start Update Configure Build Test Submit
</pre>


and convert them to CTest style:
A list of the available targets is listed by calling:


cd ProjectNightlyBuildDirectory
    ctest -D help
ctest -D Nightly
===Converting Dart to CTest===


Dashboard can be also generated in stages. This way partial testing results can be submitted and seen before long operations are completed:
CTest is actually a fully [http://www.itk.org/Dart/HTML/Index.shtml Dart]
compatible client, and could submit to any compatible server.


cd ProjectNightlyBuildDirectory
To convert existing Dart Client invocations to CTest, find lines like:
ctest -D NightlyStart
ctest -D NightlyUpdate
ctest -D NightlyConfigure
ctest -D NightlyBuild
ctest -D NightlySubmit
ctest -D NightlyTest
ctest -D NightlyCoverage
ctest -D NightlySubmit
ctest -D NightlyMemCheck
ctest -D NightlySubmit


To show what targets are available, run:
    tclsh /location/of/Dart/Source/Client/DashboardManager.tcl DartConfiguration.tcl \
        Nightly Start Update Configure Build Test Submit


ctest -D Help
Then convert them to CTest style:


Actually, any word other than <tt>Help</tt> may be used.
    ctest -D Nightly


==Advanced CTest==
==Advanced CTest==

Revision as of 09:19, 12 April 2013

Introduction

CTest is a testing tool distributed as a part of CMake. It can be used to automate updating (using CVS for example), configuring, building, testing, performing memory checking, performing coverage, and submitting results to a CDash or Dart dashboard system.

There are two basic modes of operation for CTest.

In the first mode, CMake is used to configure and build a project, using special commands in the CMakeLists.txt file to create tests. CTest can then be used to execute the tests, and optionally upload their results to a dashboard server. This is what is handled in this tutorial.

In the second mode, CTest runs a script (using the same syntax as CMakeLists.txt) to control the whole process of checking out / updating source code, configuring and building the project, and running the tests. This is handled in CMake Scripting Of CTest.

Simple Testing

CMake has support for adding tests to a project:

   enable_testing()

This adds another build target, which is test for Makefile generators, or RUN_TESTS for integrated development environments (like Visual Studio).

From that point on, you can use the ADD_TEST command to add tests to the project:

   add_test( testname Exename arg1 arg2 ... )

Or, in its longer form:

   add_test(NAME <name> [CONFIGURATIONS [Debug|Release|...]]
            [WORKING_DIRECTORY dir]
            COMMAND <command> [arg1 [arg2 ...]])

Once you have built the project, you can execute all tests via

    make test

with Makefile generators, or by rebuilding the RUN_TESTS target in your IDE. Internally this runs CTest to actually perform the testing; you could just as well execute

    ctest

in the binary directory of your build.

In some projects you will want to set *_POSTFIX properties on executables that will be executed for testing, e.g. to make executables compiled with debug information distinguishable ("<exename>-debug"). Note that the shorthand version of add_test does not automatically append these postfixes to the commands it calls for the test target, i.e. your test will want to call "<exename>" but the executable is "<exename>-debug", resulting in an error message. Use the long version of the add_test() in this case, which adds the appropriate _POSTFIX to the command name.

For more information, check the CMake Documentation or run:

   cmake --help-command enable_testing
   cmake --help-command add_test
   cmake --help-property "<CONFIG>_POSTFIX"
   cmake --help-command set_property

Dashboards

The next step is to not only execute the tests, but to log their results and provide them in such a way that they could be reviewed easily.

The result of a test run, reformatted for easy review, is called a "dashboard". A dashboard can be submitted to a central server, like CDash:

There are three types of dashboard submissions:

  • Experimental means the current state of the project. An experimental
 submission can be performed at any time, usually interactively from the
 current working copy of a developer.
  • Nightly is similar to experimental, except that the source tree will
 be set to the state it was in at a specific nightly time. This ensures that
 all "nightly" submissions correspond to the state of the project at the same
 point in time. "Nightly" builds are usually done automatically at a preset
 time of day.
  • Continuous means that the source tree is updated to the latest revision,
 and a build / test cycle is performed only if any files were actually updated.
 Like "Nightly" builds, "Continuous" ones are usually done automatically and
 repeatedly in intervals.

Dashboard Preparation

To enable the creation and submission of dashboards, add the following to your CMakeLists.txt:

   include( CTest )

This module will automatically call enable_testing() (see above), so you no longer have to do so in your CMake files. It will also add several new targets to your build.

* The three main targets:
** Experimental
** Nightly
** Continuous
* For each of the above, targets for the intermediate steps
** ...Start
** ...Update
** ...Configure
** ...Build
** ...Submit
** ...Test
** ...Coverage
** ...MemCheck
** ...Submit

The intermediate targets are created so you could submit partial test results, or inspect the results before submitting (or continuing with more time-consuming steps like MemCheck).

All this can be disabled by setting the option BUILD_TESTING (which is also added by the CTest module and enabled by default) to OFF / false.

The default settings of the module are to submit the dashboard to Kitware's Public Dashboard, where you can register your project for free.

In order to submit to some other server, "CTestConfig.cmake" in the top level directory of your source, and set your own dashboard preferences. If you are using a CDash server, you can download a preconfigured file from the respective project page on that server ("Settings" / "Project", tab "Miscellaneous").

An example of a CTestConfig.cmake:

## This file should be placed in the root directory of your project.
## Then modify the CMakeLists.txt file in the root directory of your
## project to incorporate the testing dashboard.
## # The following are required to uses Dart and the Cdash dashboard
##   ENABLE_TESTING()
##   INCLUDE(CTest)
set(CTEST_PROJECT_NAME "MyProject")
set(CTEST_NIGHTLY_START_TIME "01:00:00 UTC")

set(CTEST_DROP_METHOD "http")
set(CTEST_DROP_SITE "cdash.example.com")
set(CTEST_DROP_LOCATION "/cdash/submit.php?project=MyProject")
set(CTEST_DROP_SITE_CDASH TRUE)

Dashboard Creation

Once you have the above in place, you can build one of the targets added by the CTest module you included. Internally, this calls the CTest command line client, which you could also call directly instead:

   ctest -D Experimental

A detailed description of CTest options can be seen by running:

   ctest --help

A list of the available targets is listed by calling:

   ctest -D help

Converting Dart to CTest

CTest is actually a fully Dart compatible client, and could submit to any compatible server.

To convert existing Dart Client invocations to CTest, find lines like:

   tclsh /location/of/Dart/Source/Client/DashboardManager.tcl DartConfiguration.tcl \
       Nightly Start Update Configure Build Test Submit

Then convert them to CTest style:

    ctest -D Nightly

Advanced CTest

CTest has several additional features that include:

  1. FTP/HTTP/SCP/XMLRPC submission support
  2. Run individual tests, subset of tests, exclude tests, etc.
  3. Dynamic analysis using Valgrind or Purify
  4. Customization of the testing by providing:
    • Custom build error/warning regular expressions
    • Ability to suppress some tests from being tested or memory checked and ability to run subset of tests
    • Ability to run commands before and after tests are run
  5. Ability to run whole testing process described in a single script

Submission Of Tests

CTest currently supports four methods directly and any other indirectly. Direct methods are HTTP, FTP, SCP and XML-RPC. Both HTTP and FTP methods require extra trigger mechanism, while SCP method relies on the fact that files are on the right place. To set the appropriate submission method, set CTEST_DROP_METHOD variable in CTestConfig.cmake.

Example for HTTP submission would be:

 SET (CTEST_DROP_METHOD http)
 SET (CTEST_DROP_SITE "public.kitware.com")
 SET (CTEST_DROP_LOCATION "/cgi-bin/HTTPUploadDartFile.cgi")
 SET (CTEST_TRIGGER_SITE 
      "http://${DROP_SITE}/cgi-bin/Submit-CMake-TestingResults.pl")

where http://public.kitware.com/cgi-bin/HTTPUploadDartFile.cgi is a submit script and http://public.kitware.com/cgi-bin/Submit-CMake-TestingResults.pl is a trigger script.

For FTP submission:

  SET (CTEST_DROP_METHOD ftp) 
  SET (CTEST_DROP_SITE "public.kitware.com")
  SET (CTEST_DROP_LOCATION "/incoming")
  SET (CTEST_DROP_SITE_USER "ftpuser")
  SET (CTEST_DROP_SITE_PASSWORD "public")
  SET (CTEST_TRIGGER_SITE 
      "http://${DROP_SITE}/cgi-bin/Submit-CMake-TestingResults.pl")

where /incoming is a location on the FTP site public.kitware.com with user ftpuser and password public. The trigger scrip is the same as with the http submit.

For XML-RPC submission (Dart2):

  SET (CTEST_DROP_METHOD xmlrpc) 
  SET (CTEST_DROP_SITE "www.na-mic.org:8081")
  SET (CTEST_DROP_LOCATION "PublicDashboard")

where XML-RPC submission is on the server www.na-mic.org with the port 8081. The project name is PublicDashboard. XML-RPC submission does not require the trigger script.

Running Individual Tests

CTest supports two different ways of specifying subset of tests to run.

The first way is to specify the regular expression using -R and -E. -R specifies tests to be included and -E specifies the tests to be removed. For example, when running ctest in show-only mode, where no tests are run, we may see something like:

Test project
  1/ 13 Testing PythonDataDesc                
  2/ 13 Testing VTKTest                       
  3/ 13 Testing SystemInformation             
  4/ 13 Testing TestVTKWriters                
  5/ 13 Testing TestVTKPython                 
  6/ 13 Testing VTKPythonMultiGrid            
  7/ 13 Testing IronImage                     
  8/ 13 Testing IronImageMagic                
  9/ 13 Testing IronImageStrideMagic          
 10/ 13 Testing IronRectMagic                 
 11/ 13 Testing IronRectStrideMagic           
 12/ 13 Testing IronStructMagic               
 13/ 13 Testing IronStructStrideMagic

If we now run

 ctest -R Python

We will only see tests that contain string Python:

Test project
  1/  3 Testing PythonDataDesc                
  2/  3 Testing TestVTKPython                 
  3/  3 Testing VTKPythonMultiGrid

We can also omit tests using -E, for example:

 ctest -E Iron

will produce:

Test project
  1/  6 Testing PythonDataDesc                
  2/  6 Testing VTKTest                       
  3/  6 Testing SystemInformation             
  4/  6 Testing TestVTKWriters                
  5/  6 Testing TestVTKPython                 
  6/  6 Testing VTKPythonMultiGrid

Both -R and -E can be used at the same time.

To determine what tests are avilable, you can always run:

 ctest -N

which will display the list of tests but not actually run them.

The second way of specifying tests is using explicit test number option -I:

 ctest -I 3,5

will run tests:

Test project
Running tests: 3 4 5 
  3/ 13 Testing SystemInformation             
  4/ 13 Testing TestVTKWriters                
  5/ 13 Testing TestVTKPython

We can also specify stride:

 ctest -I ,,3

will run tests:

Test project
Running tests: 1 4 7 10 13 
  1/ 13 Testing PythonDataDesc                
  4/ 13 Testing TestVTKWriters                
  7/ 13 Testing IronImage                     
 10/ 13 Testing IronRectMagic                 
 13/ 13 Testing IronStructStrideMagic

Or run individual tests:

 ctest -I 4,4,,4,7,13

will run tests:

Test project
Running tests: 4 7 13
  4/ 13 Testing TestVTKWriters
  7/ 13 Testing IronImage
 13/ 13 Testing IronStructStrideMagic

Make sure that the first and second argument are the index of the first test

Dynamic Analysis

Software development can be significantly hindered when memory leaks are introduced in the code. Both Purify and Valgrind can catch most of them. Setting up both is extremely easy.

For example, to setup purify, all you have to do is to add:

PURIFYCOMMAND:FILEPATH=c:/Progra~1/Rational/common/purify.exe

To your cmake cache. Same way to setup valgrind, you add:

MEMORYCHECK_COMMAND:FILEPATH=/home/kitware/local/bin/valgrind

You can add additional options by specifying MEMORYCHECK_COMMAND_OPTIONS and MEMORYCHECK_SUPPRESSIONS_FILE.

Make sure to run:

ctest -D NightlyMemoryCheck

or

ctest -D NightlyStart
ctest -D NightlyUpdate
ctest -D NightlyConfigure
ctest -D NightlyBuild
ctest -D NightlyTest
ctest -D NightlyMemCheck
ctest -D NightlySubmit

Customizing CTest

CTest can be customized by providing CTestCustom.ctest or CTestCustom.cmake file in the build tree. If both files exist, CTestCustom.cmake will be preferred. If the CTestCustom.cmake/.ctest file is distributed with the sources of the project, e.g. CONFIGURE_FILE() can be used to put it in the build tree. The file may contain any SET command for any CMake variable, but the following ones will be used:

Variable Description
CTEST_CUSTOM_ERROR_MATCH Regular expression for errors during build process
CTEST_CUSTOM_ERROR_EXCEPTION Regular expression for error exceptions during build process
CTEST_CUSTOM_WARNING_MATCH Regular expression for warnings during build process
CTEST_CUSTOM_WARNING_EXCEPTION Regular expression for warning exception during build process
CTEST_CUSTOM_MAXIMUM_NUMBER_OF_ERRORS Maximum number of errors to display
CTEST_CUSTOM_MAXIMUM_NUMBER_OF_WARNINGS Maximum number of warnings to display
CTEST_CUSTOM_TESTS_IGNORE List of tests to ignore during the Test stage
CTEST_CUSTOM_MEMCHECK_IGNORE List of tests to ignore during the MemCheck stage
CTEST_CUSTOM_PRE_TEST Command to execute before any tests are run during Test stage
CTEST_CUSTOM_POST_TEST Command to execute after any tests are run during Test stage
CTEST_CUSTOM_MAXIMUM_PASSED_TEST_OUTPUT_SIZE Maximum size of passed test output
CTEST_CUSTOM_MAXIMUM_FAILED_TEST_OUTPUT_SIZE Maximum size of failed test output
CTEST_CUSTOM_PRE_MEMCHECK Command to execute before any tests are run during MemCheck stage
CTEST_CUSTOM_POST_MEMCHECK Command to execute after any tests are run during MemCheck stage
CTEST_CUSTOM_COVERAGE_EXCLUDE Regular expression for excluding files from coverage testing

Example of CTestCustom.cmake file would be:

SET(CTEST_CUSTOM_MEMCHECK_IGNORE
  ${CTEST_CUSTOM_MEMCHECK_IGNORE}
  TestSetGet
  otherPrint-ParaView
  Example-vtkLocal
  Example-vtkMy

  # These tests do not actually run any VTK code
  HeaderTesting-Common
  HeaderTesting-Filtering
  HeaderTesting-Graphics
  HeaderTesting-Imaging
  HeaderTesting-IO

  # this one runs python which then runs two
  # program so no memory checking there
  Sockets-image
  )

SET(CTEST_CUSTOM_WARNING_MATCH
  ${CTEST_CUSTOM_WARNING_MATCH}
  "{standard input}:[0-9][0-9]*: Warning: "
  )

IF("@CMAKE_SYSTEM@" MATCHES "OSF")
  SET(CTEST_CUSTOM_WARNING_EXCEPTION
    ${CTEST_CUSTOM_WARNING_EXCEPTION}
    "XdmfDOM"
    "XdmfExpr"
    "vtkKWApplication"
    "vtkKWObject"
    )
ENDIF("@CMAKE_SYSTEM@" MATCHES "OSF")

SET(CTEST_CUSTOM_WARNING_EXCEPTION
  ${CTEST_CUSTOM_WARNING_EXCEPTION}
  "tcl8.4.5/[^/]+/../[^/]+/[^.]+.c[:\"]"
  "tk8.4.5/[^/]+/[^/]+.c[:\"]"
  "VTK/Utilities/vtktiff/"
  "Utilities/vtkmpeg2/"
  "Utilities/hdf5/"
  "xtree.[0-9]+. : warning C4702: unreachable code"
  "warning LNK4221"
  "variable .var_args[2]*. is used before its value is set"
  )

CTest Scripting

For an example of how CTest can run the whole testing process described in a single script, look at how CMake dashboards are created with the CTest -S script.

Conclusion

Performing tests on the project is a great software development practice and can result in significant improvement on the quality of the project. CTest provides a simple and reliable way of performing nightly, continuous, and experimental tests.

More information about CTest can be found in Mastering CMake.



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