[dpdk-dev] [PATCH v3] doc: add meson ut info in prog guide

[Hari Kumar Vemula <hari.kumarx.vemula@intel.com>]

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Add a programmer's guide section for meson ut

Signed-off-by: Hari Kumar Vemula <hari.kumarx.vemula@intel.com>
---
v3: Modified
v2: Removed enhancement details
---
 doc/guides/prog_guide/index.rst    |   1 +
 doc/guides/prog_guide/meson_ut.rst | 159 +++++++++++++++++++++++++++++
 2 files changed, 160 insertions(+)
 create mode 100644 doc/guides/prog_guide/meson_ut.rst

diff --git a/doc/guides/prog_guide/index.rst b/doc/guides/prog_guide/index.rst
index 6726b1e8d..f4274573f 100644
--- a/doc/guides/prog_guide/index.rst
+++ b/doc/guides/prog_guide/index.rst
@@ -58,6 +58,7 @@ Programmer's Guide
     source_org
     dev_kit_build_system
     dev_kit_root_make_help
+    meson_ut
     extend_dpdk
     build_app
     ext_app_lib_make_help
diff --git a/doc/guides/prog_guide/meson_ut.rst b/doc/guides/prog_guide/meson_ut.rst
new file mode 100644
index 000000000..0e59f5526
--- /dev/null
+++ b/doc/guides/prog_guide/meson_ut.rst
@@ -0,0 +1,159 @@
+..  SPDX-License-Identifier: BSD-3-Clause
+
+    Copyright(c) 2014-2018 Intel Corporation.
+
+.. _Meson:
+
+Meson_UT
+========
+
+The meson build for unit tests under different categories is supported using 'test/test/meson.build'.
+
+This document describes the below list in detail.
+
+*  Building and Running the unit tests.
+*  Grouping of testcases.
+*  Parallel and non parallel tests.
+*  Test suites.
+*  How to run different test suites.
+*  Support for skipped tests.
+
+
+
+Building and Running the unit tests
+-----------------------------------
+
+*  Create the meson build output folder using command.
+
+   ``$ meson <build_dir>``
+
+*  Enter into build output folder, which was created by above command.
+
+   ``$ cd build``
+
+*  Compile DPDK using `$ ninja`.
+   The output file of the build will be available in meson build folder.
+   After successful ninja command, binary `dpdk-test` is created in `build/test/test/`.
+
+*  Run the unit testcases.
+
+   ``$ ninja test`` (or) ``$ meson test``
+
+*   To run specific test case via meson command.
+
+   ``$ meson test <test case>`` (or) ``$ ninja test <test case>``
+
+
+
+Grouping of testcases
+---------------------
+
+Testcases has been grouped into below four different groups based on conditions
+of time duration and performance of the individual testcase.
+
+*  fast_parallel_test_names
+*  fast_non_parallel_test_names
+*  perf_test_names
+*  driver_test_names
+*  dump_test_names
+
+Parallel and non parallel tests
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+By default, meson will run test cases in parallel. However `is_parallel` argument
+of `test()` in meson.build can be used to run tests in parallel or non-parallel
+mode based on its functionality. Test cases marked with `is_parallel : true` will
+run in parallel and tests marked with `is_parallel : false` will run in non-parallel.
+While non-parallel test is running, no other test should run.
+Parallel and non parallel test cases are grouped under the `fast_parallel_test_names`
+and `fast_non_parallel_test_names`.
+
+
+
+Test suites
+~~~~~~~~~~~
+
+Test groups are considered as `--suite` in `meson.build` and can be provided
+as argument to `test()` as  `--suite ‘project_name:label’`.
+
+    Ex: ``$ mesin test --suite ‘DPDK:fast-tests’``
+
+Running different test suites
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Below are commands to run testcases using option `suite`
+
+*  Test cases from the groups `fast_parallel_test_names` and `fast_non_parallel_test_names`
+   are run under 10seconds and below is the meson command to run them.
+
+   ``$ meson test --suite DPDK:fast-tests``
+
+*  Test cases from the group `perf_test_names` are run under 600 seconds
+   and below is the meson command to run them.
+
+   ``$ meson test --suite DPDK:perf-tests``
+
+*  Test cases from the group `driver_test_names` are run under 600 seconds
+   and below is the meson command to run them.
+
+   ``$ meson test --suite DPDK:driver-tests``
+
+*  Test cases from the group `dump_test_names` are run under 600 seconds
+   and below is the meson command to run them.
+
+   ``$ meson test --suite DPDK:dump-tests``
+
+
+
+Skipped testcases
+-----------------
+
+Some unit test cases have dependency on external libraries, driver modules or
+config flags, without which the test cases cannot be run. such test cases
+should return TEST_SKIPPED when mentioned dependencies are not enabled. To make
+test cases run user should enable relevant dependencies. Below are the few
+current scenarios when test cases are skipped:
+
+#. External library dependency paths are not set.
+#. Config flag for the dependent library is not enabled.
+#. Dependent driver modules are not installed on the system.
+
+Dependent library paths can be set using below
+
+*  Single path ``$ export LIBRARY_PATH=path``
+
+*  Multiple paths ``$ export LIBRARY_PATH=path1:path2:path3``
+
+Dependent library headers path can be stated as part of meson build command as below.
+
+*  Single path ``$ CFLAGS=-I/path meson build``
+
+*  Multiple paths ``$ CFLAGS=-I/path1 -I/path2 meson build``
+
+Below examples shows how to export libraries and their header paths.
+
+To specify single library at a time.
+
+        ``$ export LIBRARY_PATH=/root/wireless_libs/zuc/``
+        ``$ CFLAGS=-I/root/wireless_libs/zuc/include meson build``
+
+To specify multiple libraries at a time.
+
+        ``$ export LIBRARY_PATH=/root/wireless_libs/zuc/:/root/wireless_libs/`` \
+                                                    ``libsso_kasumi/build/``
+        ``$ CFLAGS=-I/root/wireless_libs/zuc/include -I/root/wireless_libs/`` \
+                                        ``libsso_kasumi/include meson build``
+
+
+
+Summery of Commands to run meson UTs
+------------------------------------
+
+*   To run all test cases
+       ``$ meson test``
+*   To run specific test
+       ``$ meson test testcase_name``
+        Ex:``$ meson test acl_autotest``
+*   To run specific test suite
+       ``$ meson test --suite DPDK:suite_name``
+        Ex:``$ meson test --suite DPDK:fast-tests``
-- 
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