Python 인터넷 Continuous Integration Testing For Flask with Jenkins Create a simple flask app

2020.12.29 14:10

Continuous Integration Testing For Flask with Jenkins

Create a simple flask app

There is a minimal flask app app.py

from flask import Flask
app = Flask(__name__)
@app.route('/')
def hello():
    return 'Hello World!\n'
if __name__ == '__main__':
    app.run()

Create a test case

Create a test file test.py

import unittest
from app import app
class TestHello(unittest.TestCase):
    def setUp(self):
        app.testing = True
        self.app = app.test_client()
    def test_hello(self):
        rv = self.app.get('/')
        self.assertEqual(rv.status, '200 OK')
        self.assertEqual(rv.data, b'Hello World!\n')
if __name__ == '__main__':
    unittest.main()

Now if we run python3 test.py, the test should pass.

Jenkinsfile

The Jenkinsfile is

pipeline {
    agent { docker { image 'python:3.7.2' } }
    stages {
        stage('build') {
            steps {
                sh 'pip install flask
            }
        }
        stage('test') {
            steps {
                sh 'python test.py'
            }
        }
    }
}

Now we have a repository with three files:

app.py
test.py
Jenkinsfile

Save it to github or other git server, suppose the git url is https://github.com/darkn3rd/webmf-python-flask.

Install Jenkins

The quickest way is to use a customized jenkins docker.

Suppose we have a Dockerfile

FROM jenkins/jenkins:alpine

ENV JENKINS_USER admin
ENV JENKINS_PASS admin

# Skip initial setup
ENV JAVA_OPTS -Djenkins.install.runSetupWizard=false


COPY plugins.txt /usr/share/jenkins/plugins.txt
RUN /usr/local/bin/install-plugins.sh < /usr/share/jenkins/plugins.txt
USER root
RUN apk add docker
RUN apk add py-pip
RUN apk add python-dev libffi-dev openssl-dev gcc libc-dev make
RUN pip install docker-compose

and the plugins.txt

경축! 아무것도 안하여 에스천사게임즈가 새로운 모습으로 재오픈 하였습니다.
어린이용이며, 설치가 필요없는 브라우저 게임입니다.
https://s1004games.com

ace-editor
ant
antisamy-markup-formatter
branch-api
cloudbees-folder
credentials
cvs
docker
durable-task
external-monitor-job
git-client
git-server
git
github-api
github-branch-source
github
javadoc
jquery-detached
junit
ldap
mailer
matrix-auth
matrix-project
maven-plugin
metrics
pam-auth
plain-credentials
scm-api
script-security
ssh-credentials
ssh-slaves
subversion
translation
variant
windows-slaves
workflow-aggregator
workflow-api
workflow-basic-steps
workflow-cps-global-lib
workflow-cps
workflow-durable-task-step
workflow-job
workflow-multibranch
workflow-scm-step
workflow-step-api
workflow-support
favorite
token-macro
pipeline-stage-step
blueocean
blueocean-autofavorite
gitlab-plugin

then execute

sudo docker build -t custom-jenkins .

After the image custom-jenkins is finished, run it with

# use user root other than default jenkins to avoid permission problem
# use docker on the host, because there is no docker daemon in a docker container
sudo docker run --user root \
		 -v /var/run/docker.sock:/var/run/docker.sock \
		 -p 8080:8080 -p 50000:50000 custom-jenkins

Open http://127.0.0.1:8080 in browser, and

add a Pipeline with Definition being Pipeline script from SCM
set the SCM to Git with url https://github.com/darkn3rd/webmf-python-flask.
Save

Test Report

Jenkins supports to represent the test reports with the JUnit format in the Blue Ocean, so we should change the output of the test

if __name__ == '__main__':
    import xmlrunner
    runner = xmlrunner.XMLTestRunner(output='test-reports')
    unittest.main(testRunner=runner)

and the Jenkinsfile

pipeline {
    agent { docker { image 'python:3.7.2' } }
    stages {
        stage('build') {
            steps {
                sh 'pip install flask
            }
        }
        stage('test') {
            steps {
                sh 'python test.py'
            }
            post {
                always {junit 'test-reports/*.xml'}
            }
        }
    }
}

References

[출처] http://pkuwwt.github.io/programming/2020-03-16-jenkins-continuous-integration-testing-for-flask/

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