Add more content to developer overview

- copy "Coding Style" from `CONTRIBUTING.md`
- copy "Testing" from `DEVELOP.md`
- add links of primary packages

Change-Id: Ia4da2c610a3ceb41ec710904e9437b0449d0a46f
Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>
(cherry picked from commit 540f711b71976c587417b0a3a04a89b79cf465d4)

1 files changed, 78 insertions, 15 deletions

diff --git a/docs/testing/developer/devguide/overview.rst b/docs/testing/developer/devguide/overview.rst
index 4ccaae20..d394574e 100644
--- a/docs/testing/developer/devguide/overview.rst
+++ b/docs/testing/developer/devguide/overview.rst
@@ -1,27 +1,90 @@
 .. This work is licensed under a Creative Commons Attribution 4.0 International License.
 .. http://creativecommons.org/licenses/by/4.0
-.. (c) 2017 ZTE Corp.
+.. (c) 2017 ZTE Corporation
 
 
 ########
 Overview
 ########
 
-QTIP uses Python as primary programming language. The structure of repository is based on the recommended sample in
+QTIP uses Python as primary programming language and build the framework from the following packages
+
+======== ===============================================================================================================
+Module   Package
+======== ===============================================================================================================
+api      `Connexion`_ - API first applications with OpenAPI/Swagger and Flask
+cli      `Click`_ - the “Command Line Interface Creation Kit”
+template `Jinja2`_ - a full featured template engine for Python
+docs     `sphinx`_ - a tool that makes it easy to create intelligent and beautiful documentation
+testing  `pytest`_ - a mature full-featured Python testing tool that helps you write better programs
+======== ===============================================================================================================
+
+***********
+Source Code
+***********
+
+ The structure of repository is based on the recommended sample in
 `The Hitchhiker's Guide to Python`_
 
-==============  ==========================================================================
-Path            Content
-==============  ==========================================================================
-./benchmarks/   builtin benchmark assets including plan, QPI and metrics
-./contrib/      independent project/plugin/code contributed to QTIP
-./docker/       configuration for building Docker image for QTIP deployment
-./docs/         release notes, user and developer documentation, design proposals
-./legacy/       legacy obsoleted code that is unmaintained but kept for reference
-./opt/          optional component, e.g. scripts to setup infrastructure services for QTIP
-./qtip/         the actual package
-./tests/        package functional and unit tests
-./third-party/  third part included in QTIP project
-==============  ==========================================================================
+==================  ========================================================================================================
+Path                Content
+==================  ========================================================================================================
+``./benchmarks/``   builtin benchmark assets including plan, QPI and metrics
+``./contrib/``      independent project/plugin/code contributed to QTIP
+``./docker/``       configuration for building Docker image for QTIP deployment
+``./docs/``         release notes, user and developer documentation, design proposals
+``./legacy/``       legacy obsoleted code that is unmaintained but kept for reference
+``./opt/``          optional component, e.g. scripts to setup infrastructure services for QTIP
+``./qtip/``         the actual package
+``./tests/``        package functional and unit tests
+``./third-party/``  third part included in QTIP project
+==================  ========================================================================================================
+
+************
+Coding Style
+************
+
+QTIP follows `OpenStack Style Guidelines`_ for source code and commit message.
+
+Specially, it is recommended to link each patch set with a JIRA issue. Put::
+
+    JIRA: QTIP-n
+
+in commit message to create an automatic link.
+
+*******
+Testing
+*******
+
+All testing related code are stored in ``./tests/``
+
+==================  ========================================================================================================
+Path                Content
+==================  ========================================================================================================
+``./tests/data/``   data fixtures for testing
+``./tests/unit/``   unit test for each module, follow the same layout as ./qtip/
+``./conftest.py``   pytest configuration in project scope
+==================  ========================================================================================================
+
+`tox`_ is used to automate the testing tasks
+
+.. code-block:: shell
+
+    cd <project_root>
+    pip install tox
+    tox
+
+The test cases are written in `pytest`_. You may run it selectively with
+
+.. code-block:: shell
+
+    pytest tests/unit/reporter
 
+.. _Connexion: https://pypi.python.org/pypi/connexion/
+.. _Click: http://click.pocoo.org/
+.. _Jinja2: http://jinja.pocoo.org/
+.. _OpenStack Style Guidelines: http://docs.openstack.org/developer/hacking/
+.. _pytest: http://doc.pytest.org/
+.. _sphinx: http://www.sphinx-doc.org/en/stable/
 .. _The Hitchhiker's Guide to Python: http://python-guide-pt-br.readthedocs.io/en/latest/writing/structure/
+.. _tox: https://tox.readthedocs.io/