Run tests in Jenkins pipeline when the build is running - jenkins

Question

I am trying to configure the pipeline to run automated e2e test on each PR to dev branch.
For that I am pulling the project, build it and when I want to run my tests I can not do this because when the project runs the pipeline doesn't switch to the second stage.
The question is when I build the project in Jenkins and it runs, how to force my test to run?
I tried parallel stage execution but it also doesn't work, because my tests start running when the project starts building.
My pipeline:
pipeline {
agent any
stages {
stage('Build') {
steps {
echo 'Cloning..'
git branch: 'dev', url: 'https://github.com/...'
echo 'Building..'
sh 'npm install'
sh 'npm run dev'
}
}
stage('e2e Test') {
steps {
echo 'Cloning..'
git branch: 'cypress-tests', url: 'https://github.com/...'
echo 'Testing..'
sh 'cd cypress-e2e'
sh 'npm install'
sh 'npm run dev'
}
}
}
}

Answer 1

You can add a stage for cloning the test branch and then run the build and the test stages in the same tame using parallel. The following pipeline should work:
pipeline {
agent any
stages {
stage ('Clone branchs') {
steps {
echo 'Cloning cypress-tests'
git branch: 'cypress-tests', url: 'https://github.com/...'
echo 'Cloning dev ..'
git branch: 'dev', url: 'https://github.com/...'
}
}
stage('Build and test') {
parallel {
stage('build') {
steps {
echo 'Building..'
sh 'npm install'
sh 'npm run dev'
}
}
stage('e2e Test') {
steps {
echo 'Testing..'
sh 'cd cypress-e2e'
sh 'npm install'
sh 'npm run dev'
}
}
}
}
}
Your will have the following pipeline:

Answer 2

I can think of two potential ways to handle this:
Execute each stage on different node. So that different workspaces would be created for each stage. Example:
pipeline {
agent any
stages {
stage('Build') {
agent {
label "node1"
}
steps {
echo 'Cloning..'
git branch: 'dev', url: 'https://github.com/...'
echo 'Building..'
sh 'npm install'
sh 'npm run dev'
}
}
stage('e2e Test') {
agent {
label "node2"
}
steps {
echo 'Cloning..'
git branch: 'cypress-tests', url: 'https://github.com/...'
echo 'Testing..'
sh 'cd cypress-e2e'
sh 'npm install'
sh 'npm run dev'
}
}
}
}
Create separate directories for BUILD_DIR and E2E_DIR.
cd into the relevant one for each stage and do the git checkout and the rest of the steps there. Example:
pipeline {
agent any
stages {
stage('Build') {
steps {
sh '''
BUILD="${WORKSPACE}/BUILD_DIR"
mkdir -p "${BUILD}" && cd "${BUILD}"
'''
echo 'Cloning..'
git branch: 'dev', url: 'https://github.com/...'
echo 'Building..'
sh 'npm install'
sh 'npm run dev'
}
}
stage('e2e Test') {
steps {
sh '''
E2E="${WORKSPACE}/E2E_DIR"
mkdir -p "${E2E}" && cd "${E2E}"
'''
echo 'Cloning..'
git branch: 'cypress-tests', url: 'https://github.com/...'
echo 'Testing..'
sh 'cd cypress-e2e'
sh 'npm install'
sh 'npm run dev'
}
}
}
}