Python template

• Click on this link / Use This Template button in the GitHub page above to create a brand new python project with built in build and unit test system enabled.
• TODO: Edit this file for each project you create.

Building and testing

Prerequisites

• Verify that Python-3 and pip3 should be installed in your system. terminal>pip3 -V
• Install pyb: pip3 install pybuilder
• Verify Pyb installation :pyb --version

# If pyb command is not found, you will have to add pyb to path.
# follow these instructions to add pyb to path.

# for ubuntu/bash:
> echo 'export PATH=$PATH:/<path/to/pyb/bin>' >> ~/.bashrc
# this is usually /home/<home folder>/.local/bin 
> source ~/.bashrc

To build,clean and run tests, use the following command:

Build and test

pyb install_dependencies 
# Pyb should work without pyb install_dependencies, but unfortunately it doesnt.
# See details: here https://github.com/pybuilder/pybuilder/issues/727 
pyb -v

• That's all you need to build the project.
• Details about Test failures if any can be found in file target\reports\unittest
• The binary artifacts will be available in the target folder.

Running Integration Tests

# To skip integration tests during build use the below command
pyb -x run_integration_tests
# To run only integration tests use the below command
pyb run_integration_tests -x run_unit_tests

Clean builds :

• pyb clean

Reset environment :

• pyb clean && rm -rf .pybuilder

working with the build system

• Tutorial: https://pybuilder.io/documentation/tutorial
• To make changes to build scripts see this: https://pythonhosted.org/pybuilder/walkthrough-new.html

Running Python Lint Checks

• This project uses Flake8 as the default linter for coding style enforcement.
• Refer https://flake8.pycqa.org/en/latest/ for more details.
• Before raising a pull request contributors are advised to run the below command locally to ensure there are no Flake8 warnings.

 pyb analyze

• Please ensure build passes on running the above command without any warnings. Examples of Flake 8 warnings shown below:

E501 line too long (125 > 120 characters)
F403 'from local_settings import *' used; unable to detect undefined names
F401 'django.contrib.auth.views as auth_views' imported but unused

IDE/Editor setup

Pycharm/intellij

Support is present in source. .idea files are avilable when you clone this repo. Just open the folder in pycharm.

Vim

• Vim's config file is usually located in ~/.vimrc . Locate the Vim rc file.
• create/Append the file with this config file.

Project structure

• Use src/main/python/<module> to add your python module.
• Write unit tests in src/unittest/ directory mirroring the same module structure in src/main directory.
• The build artifacts can be found in target directory.

Adding dependencies

• Dependencies are managed through the build.py file.
• Refer https://pybuilder.io/documentation/plugins#installing-dependencies to see how this can be done.
• After updating dependencies, run the following command.

 pyb install_dependencies

Writing tests

• Write unit tests in src/unittest/ directory mirroring the same module structure in src/main directory.
• Use One of the two below supported testing suites.
  • Python unit test framework : https://docs.python.org/3/library/unittest.html
  • Mockito spying framewrk, see docs: https://mockito-python.readthedocs.io/en/latest/

Follow the above two links on details on how to write tests.

Writing integration tests

• Write integration tests in src/integrationtest/python/ directory.
• Integration test file names should end with _tests.py.
• Refer https://pybuilder.io/documentation/plugins#running-python-integration-tests for more details.

Running tests with coverage

• pyb -v runs unit tests as part of every build
• Default coverage is set to 70%. To change the defaults, see https://pybuilder.io/documentation/plugins#measuring-unittest-coverage

Credits

• We use pybuilder as the build tool.
• https://www.youtube.com/watch?v=iQU18hAjux4&