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/**
@page tests Test architecture
@tableofcontents
@section building_test_dependencies Building dependencies
The tests currently make use of Boost (Test and Program options) for validation
and Google Benchmark for performance runs. Below are instructions about how to
build these 3rd party libraries.
@subsection building_boost Building Boost
First follow the instructions from the Boost library on how to setup the Boost
build system
(http://www.boost.org/doc/libs/1_64_0/more/getting_started/index.html).
Afterwards the required libraries can be build with:
./b2 --with-program_options --with-test link=static \
define=BOOST_TEST_ALTERNATIVE_INIT_API
Additionally, depending on your environment, it might be necessary to specify
the ```toolset=``` option to choose the right compiler. Moreover,
```address-model=32``` can be used to force building for 32bit and
```target-os=android``` must be specified to build for Android.
After executing the build command the libraries
```libboost_program_options.a``` and ```libboost_unit_test_framework.a``` can
be found in ```./stage/lib```.
@subsection building_google_benchmark Building Google Benchmark
Instructions on how to build Google Benchmark using CMake can be found in their
repository: https://github.com/google/benchmark. For example, building for
Android 32bit can be achieved via
cmake -DCMAKE_BUILD_TYPE=Release \
-DCMAKE_CXX_COMPILER=arm-linux-androideabi-clang++ \
-DBENCHMARK_ENABLE_LTO=false -DBENCHMARK_ENABLE_TESTING=false ..
The library required by the compute library is ```libbenchmark.a```.
@section tests_running_tests Running tests
@subsection tests_running_tests_benchmarking Benchmarking
@subsubsection tests_running_tests_benchmarking_filter Filter tests
All tests can be run by invoking
./arm_compute_benchmark -- ./data
where `./data` contains the assets needed by the tests.
If only a subset of the tests has to be executed the `--benchmark_filter` option takes a regular expression to select matching tests.
./arm_compute_benchmark --benchmark_filter=neon_bitwise_and ./data
All available tests can be displayed with the `--benchmark_list_tests` switch.
./arm_compute_benchmark --benchmark_list_tests ./data
@subsubsection tests_running_tests_benchmarking_runtime Runtime
By default every test is run multiple *iterations* until a minimum time is reached. The minimum time (in seconds) can be controlled with the `--benchmark_min_time` flag. However, each test might have a hard coded value for the number of iterations or minimum execution time. In that case the command line argument is ignored for those specific tests.
Additionally it is possible to specify multiple *repetitions* (`--benchmark_repetitions`) which will run each test multiple times (including the iterations). The average and standard deviation for all repetitions is automatically computed and reported.
@subsubsection tests_running_tests_benchmarking_verbosity Verbosity
The verbosity of the test output can be controlled via the `--v` flag. Though it should hardly ever be necessary.
@subsection tests_running_tests_validation Validation
@subsubsection tests_running_tests_validation_filter Filter tests
All tests can be run by invoking
./arm_compute_validation -- ./data
where `./data` contains the assets needed by the tests.
As running all tests can take a lot of time the suite is split into "precommit" and "nightly" tests. The precommit tests will be fast to execute but still cover the most important features. In contrast the nightly tests offer more extensive coverage but take longer. The different subsets can be selected from the command line as follows:
./arm_compute_validation -t @precommit -- ./data
./arm_compute_validation -t @nightly -- ./data
Additionally it is possible to select specific suites or tests:
./arm_compute_validation -t CL -- ./data
./arm_compute_validation -t NEON/BitwiseAnd/RunSmall/_0 -- ./data
All available tests can be displayed with the `--list_content` switch.
./arm_compute_validation --list_content -- ./data
For a complete list of possible selectors please see: http://www.boost.org/doc/libs/1_64_0/libs/test/doc/html/boost_test/runtime_config/test_unit_filtering.html
@subsubsection tests_running_tests_validation_verbosity Verbosity
There are two separate flags to control the verbosity of the test output. `--report_level` controls the verbosity of the summary produced after all tests have been executed. `--log_level` controls the verbosity of the information generated during the execution of tests. All available settings can be found in the Boost documentation for [--report_level](http://www.boost.org/doc/libs/1_64_0/libs/test/doc/html/boost_test/utf_reference/rt_param_reference/report_level.html) and [--log_level](http://www.boost.org/doc/libs/1_64_0/libs/test/doc/html/boost_test/utf_reference/rt_param_reference/log_level.html), respectively.
*/
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