# Executable Testing / Test Data

## Introduction

An executable test can be run with several wrappers, e.g. with valgrind, memcheck or a simple time-measurement. Each wrapper run can then be validated (called testers), e.g. with file-diffs or -greps. This can be configured in CMake:

AddTest(
NAME GroundWaterFlowProcess
EXECUTABLE ogs
RUNTIME 35                                                        # optional
WRAPPER time                                                      # optional
TESTER diff                                                       # optional
)


Tests are then run with ninja ctest or for more verbose output with ctest -VV (you may also use other ctest options). If the checker has some errors they are displayed. RUNTIME specifies the typical runtime in seconds on an Intel Xeon E5-2680 v2 @ 2.80 GHz with 500 GiB RAM (envinf1). Tests with a RUNTIME > 60 are considered LARGE-tests.

The functionality is very flexible and more wrappers and checker can be added later on. e.g. for running some statistics on output files and comparing them with statistics from reference files.

### Run tests with CMake presets

Similar to the configure and build presets there are test presets, e.g. in your source-directory:

ctest --preset release                          # equivalent to running ninja ctest above
ctest --preset release -j 6 --label-regex Utils # run 6 tests in parallel which have a Utils label


To sum up: from a clean source directory you can fully configure, build and test ogs with these 3 commands:

cmake -S . --preset release
cmake --build --preset release
ctest --preset release


## Test Data

Test data is stored in Tests/Data. Generated test output files should be found in [build-dir]/Tests/Data.

In the OGS-cli outputting to [build-dir]/Tests/Data is already handled (via the -o parameter). For other executables you have to implement this, e.g. a with parameter specifying the output directory.

In code BaseLib::BuildInfo::data_path (from BuildInfo.h) references the data source directory and BaseLib::BuildInfo::data_binary_path references the data output directory.

For adding new data files simply commit the new files as usual.

This article was written by Lars Bilke. If you are missing something or you find an error please let us know. Generated with Hugo 0.79.0. Last revision: August 26, 2021
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