# CDash Testing Dashboard¶

## Background¶

CMake is a cross-platform build system generator. On UNIX systems, CMake is generally used to generate Unix Makefiles. On Windows systems, CMake is generally used to generate Visual Studio Projects. However, CMake is not limited to these generators and has support for Ninja, Xcode, NMake, among others.

CTest is a components of CMake for testing. It provides a generic syntax for executing tests and features such as timeouts, pass/fail regex, concurrent execution of tests, test labeling and grouping, among many others. It is not a replacement for Python unittest, Google Test, etc. CTest is a framework for executing those tests and also testing and logging the build and configuration if desired.

For technical issues regarding CMake and CTest, please consult the CMake documentation.

CDash is an open source, web-based software testing server. CDash aggregates, analyzes and displays the results of software testing processes submitted from clients located around the world. Developers depend on CDash to convey the state of a software system, and to continually improve its quality. CDash is typically part of a larger software process that integrates Kitware's CMake, CTest, and CPack tools, as well as other external packages used to design, manage and maintain large-scale software systems. CDash documentation can be found at the Paraview CDash Wiki page.

## Overview¶

NERSC provides a CDash web-server at cdash.nersc.gov and it is recommended for continuous integration (CI) aggregation across all your CI platforms -- such Travis, Jenkins, AppVeyor, etc. -- as it extensively simplifies diagnosing CI issues and provides a location to log performance history.

If the project uses CMake to generate a build system, see CDash submission for CMake projects.

If the project does not use CMake, NERSC provides python bindings to CMake/CTest in a project called pyctest. These bindings allow projects to generate CTest tests and submit to the dashboard regardless of the build system (CMake, autotools, setup.py, etc.). This package is available with PyPi (source distribution) and Anaconda (pre-compiled distributions). For usage, see CDash submission for non-CMake projects, the pyctest documentation.

• Anaconda: conda install -c conda-forge pyctest
• PyPi: pip install -vvv pyctest

## Features¶

• Automated emails
• Build warnings and failures
• Tests failing
• Low code coverage
• Test timing changes
• Capture standard out and standard error from all the stages of building, testing, and deploying the package
• Code coverage reports (in a variety of formats) can be uploaded, visually displayed, and thresholds can be set to notify developers if coverage drops below the threshold
• Memory checking for leaks can be analyzed and reported
• Visual results can be uploaded along with logs
• e.g. if a test generates a visual product, by echoing a message such as <DartMeasurementFile name="ExampleImage" type="image/jpeg">./example_image.jpeg</DartMeasurementFile> to stdout, the example_image.jpeg will be uploaded to the dashboard and displayed in the test log
• ASCII results can be attached as "Notes" to the "build"
• Three primary submission tracks
• Continuous
• Nightly
• Experimental
• Ability to create subprojects
• Public and private dashboards
• Token-authenticated submission
• Information on submission sites platform automatically recorded
• Number of CPU cores
• Processor speed
• Operating system
• etc.

## Configuration¶

The dashboard client configuration has 8 possible steps, many of which are optional:

• CTest Start Step

• This step is required and typically involves obtaining the source code

• The command executed in this step is set by the definition of the CTEST_CHECKOUT_COMMAND

• e.g. set(CTEST_CHECKOUT_COMMAND "git clone https://github.com/jrmadsen/pyctest.git pyctest-src")
• This step is invoked via ctest_start(...) [see CTest documentation for ctest_start]

• CTest Update Step

• This step is optional and typically involves changing the branch, applying a patch, etc. when used by setting the CTEST_UPDATE_COMMAND variable

• This step is automatically involved by ctest_start when CTEST_UPDATE_COMMAND is defined

• CTest Configure Step

• This step is optional and typically involves running cmake or an autotools configure script when the package involves compiled code

• The command executed in this step is set by the definition of the CTEST_CONFIGURE_COMMAND

• The log for this step, including the list of warnings and errors, can be found in the Configure subsection of the Build section of the dashboard

• CTest Build Step

• This step is optional and typically involves invoking the build program and compiling your code

• The command executed in this step is set by the definition of the CTEST_BUILD_COMMAND

• The log for this step, including the list of warnings and errors, can be found in the Build subsection of the Build section of the dashboard

• CTest Test Step

• This step is optional and invokes running all the tests provided by CTestTestfile.cmake in the binary directory

• The top-level CTestTestfile.cmake should add any subdirectories containing additional CTestTestfile.cmake

- e.g. subdirs("examples") to add the tests defined in
examples/CTestTestfile.cmake

• CTest Coverage Step

• This step is optional and invokes a user command followed by a search for code coverage files -- such as Python trace *.cover files, Cobertera coverage.xml files, GCov results, etc.

• The command executed in this step is set by the definition of the CTEST_COVERAGE_COMMAND

• CTest MemCheck Step

• This step is optional and typically involves running valgrind

• Memory checking with tools such as valgrind

• CTest Submit Step

• This step is required and uploads the output of the previous

## Using CDash with CMake¶

CTest + CDash is easily integrated into an existing CMake build system. For using CTest + CDash with a CMake build system, refer to the CTest/CDash with CMake documentation page.

## Using CDash without CMake¶

CTest + CDash can be utilized without a CMake build system. For using CTest + CDash without a CMake build system, refer to the CTest/CDash without CMake documentation page.

## Dashboard Registration¶

• Click on the Register button in the top-left corner
• Fill out the form

• Click Register

• Confirm the email account
• Subscribe to any existing projects as desired

### Create Project¶

• Click on Create new project once you have navigated to the My CDash page

• Fill out the project information pages and then click Create Project button in the Miscellaneous tab

### Project Settings¶

Once the project has been created, these settings can be updated via Settings > Project. Here you can download the CTestConfig.cmake for the project and also provide a CTest template Script under the Clients tab.