[dpdk-dev] [PATCH v6] doc: add meson ut info in prog guide

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

Add a programmer's guide section for meson ut

Signed-off-by: Hari Kumar Vemula <hari.kumarx.vemula@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
---
v6: Updated comments
v5: Modified
v4: Typos corrected
v3: Modified
v2: Removed enhancement details
---
 doc/guides/prog_guide/index.rst    |   1 +
 doc/guides/prog_guide/meson_ut.rst | 151 +++++++++++++++++++++++++++++++++++++
 2 files changed, 152 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 692409af8..9465bc8e6 100644
--- a/doc/guides/prog_guide/index.rst
+++ b/doc/guides/prog_guide/index.rst
@@ -60,6 +60,7 @@ 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..e0aa15389
--- /dev/null
+++ b/doc/guides/prog_guide/meson_ut.rst
@@ -0,0 +1,151 @@
+..  SPDX-License-Identifier: BSD-3-Clause
+
+    Copyright(c) 2018-2019 Intel Corporation.
+
+.. _meson_unit_tests:
+
+Running DPDK Unit Tests with Meson
+==================================
+
+This section describes how to run testcases with the DPDK meson build system.
+
+
+Building and running the unit tests
+-----------------------------------
+
+* Create the meson build output folder using the following command::
+
+      $ meson <build_dir>
+
+* Enter into build output folder, which was created by above command::
+
+      $ cd build
+
+* Compile DPDK using command::
+
+      $ ninja
+
+The output file of the build will be available in meson build folder. After
+a successful ninja command, the 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::
+
+      $ meson test <test case>
+      # or
+      $ ninja test <test case>
+
+
+Grouping of testcases
+---------------------
+
+Testcases have been grouped into four different groups based on conditions
+of time duration and performance of the individual testcase.
+
+* Fast tests which can be run in parallel.
+* Fast tests which must run serially.
+* Performance tests.
+* Driver tests.
+* Tests which produce lists of objects as output, and therefore that need
+  manual checking.
+
+Testcases can be run in parallel or non-parallel mode using the ``is_parallel`` argument
+of ``test()`` in meson.build
+
+These tests can be run using the argument to ``meson test`` as
+``--suite project_name:label``.
+
+For example::
+
+    $ meson test --suite DPDK:fast-tests
+
+
+The project name is optional so the following is equivalent to the previous
+command::
+
+
+    $ meson test --suite fast-tests
+
+
+Running different test suites
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The following commands are some examples of how to run testcases using option
+``--suite``:
+
+* Fast Tests should take less than 10 seconds. The meson command to run them
+  is::
+
+      $ meson test --suite DPDK:fast-tests
+
+* Performance Tests should take less than 600 seconds. The meson command to
+  run them is::
+
+      $ meson test --suite DPDK:perf-tests
+
+* Driver Tests should take less than 600 seconds. The meson command to run
+  them is::
+
+      $ meson test --suite DPDK:driver-tests
+
+* The meson command to run Dump Tests is::
+
+      $ meson test --suite DPDK:dump-tests
+
+
+Dealing with skipped testcases
+------------------------------
+
+Some unit test cases have a dependency on external libraries, driver modules
+or config flags, without which the test cases cannot be run. Such test cases
+will be reported as skipped if they cannot run. To enable those test cases,
+the user should ensure the required dependencies are met.  Below are a few
+possible causes why tests may be skipped and how they may be resolved:
+
+#. Optional external libraries are not found.
+#. Config flags for the dependent library are not enabled.
+#. Dependent driver modules are not installed on the system.
+
+To help find missing libraries, the user can specify addition search paths
+for those libraries as below:
+
+* Single path::
+
+      $ export LIBRARY_PATH=path
+
+* Multiple paths::
+
+      $ export LIBRARY_PATH=path1:path2:path3
+
+Some functionality may be disabled due to library headers being missed as part
+of the build. To specify an additional search path for headers at
+configuration time, use one of the commands below:
+
+*  Single path::
+
+       $ CFLAGS=-I/path meson build
+
+*  Multiple paths::
+
+       $ CFLAGS=-I/path1 -I/path2 meson build
+
+Below are some examples that show how to export libraries and their header
+paths.
+
+To specify a 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=/path/zuc/:/path/libsso_kasumi/build/
+    $ CFLAGS=-I/path/zuc/include \
+             -I/path/libsso_kasumi/include \
+	     meson build
-- 
2.14.1