CI/CD stands for Continuous Integration and Continuous Delivery/Continuous Deployment. It is a software development and delivery approach that automates the process of integrating code changes, building applications, executing automated tests, and delivering software to different environments.
In Selenium automation, CI/CD allows automated tests to run automatically whenever developers commit or push code. This helps development and QA teams identify defects earlier and continuously validate application quality.
CI/CD is an important part of modern Agile and DevOps practices because it connects development, testing, build, deployment, and monitoring activities into an automated workflow.
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CI/CD is a collection of practices, processes, and automation techniques used to frequently integrate code changes, validate them through automated checks, and deliver reliable software to users.
The main objective is to reduce manual effort, detect defects early, shorten release cycles, and create a repeatable software delivery process.
Developer Writes Code
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Git Commit
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Git Repository
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CI/CD Pipeline
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Build Application
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Run Automated Tests
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Generate Test Report
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Deploy Application
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Testing / Production Environment
CI means Continuous Integration. It is the practice of frequently integrating code changes from multiple developers into a shared repository and automatically validating those changes through builds and tests.
Instead of waiting until the end of a project to combine code, developers integrate their changes regularly.
A typical CI process includes:
CD can refer to Continuous Delivery or Continuous Deployment.
Continuous Delivery means that code changes are automatically built, tested, and prepared for release. Deployment to production may require a manual approval step.
Continuous Deployment goes further by automatically deploying successfully validated changes to production without requiring a separate manual deployment step.
| Concept | Description |
|---|---|
| Continuous Integration | Frequently integrate and validate code changes. |
| Continuous Delivery | Automatically prepare validated software for release. |
| Continuous Deployment | Automatically deploy validated changes to production. |
CI/CD is closely associated with DevOps. DevOps encourages collaboration between development, testing, operations, and other teams involved in software delivery.
CI/CD provides the automation needed to implement many DevOps practices.
Development
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Version Control
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CI Build
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Automated Testing
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Quality Validation
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Deployment
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Monitoring
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Feedback
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+--------------------+
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Next Change
Traditional software delivery can involve many manual steps. Developers may create builds manually, testers may execute tests manually, and deployment teams may manually move applications between environments.
CI/CD automates many of these repetitive activities.
Selenium automation can be integrated into CI/CD pipelines so that browser tests execute automatically after code changes or application deployments.
For example, a Selenium TestNG project can be stored in GitHub. Jenkins can detect a new commit, build the Maven project, execute TestNG tests, and publish test reports.
Developer
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Git Push
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GitHub / Git Repository
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Jenkins
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Maven Build
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TestNG
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Selenium WebDriver
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Browser
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Application
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Test Report
A typical Selenium CI/CD workflow can be represented as:
Code Change
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Git Commit
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Git Push
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CI Server Trigger
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Checkout Source Code
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Install Dependencies
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Compile Project
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Run Automated Tests
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Selenium Browser Execution
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Generate Reports
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Archive Results
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Deploy / Release
Git is a distributed version control system commonly used to manage source code.
CI/CD pipelines typically obtain the latest application and automation code from a Git repository.
Common Git operations include:
git clone
git status
git add .
git commit -m "Add login automation"
git push
git pull
git branch
git merge
When a developer pushes code to a configured repository, the CI system can use that event to start a pipeline.
GitHub can host application and automation source code. A CI/CD platform can monitor the repository and execute workflows based on repository events.
A typical Selenium project may contain:
selenium-project
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|-- src
| |-- test
| |-- java
| |-- tests
| |-- pages
| |-- utilities
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|-- pom.xml
|-- testng.xml
|-- README.md
|-- .gitignore
A CI server is a system that automatically performs tasks such as checking out source code, building projects, running tests, and publishing results.
Examples of CI/CD platforms and tools include:
The exact platform can vary by organization and project requirements.
Jenkins is an automation server commonly used to implement CI/CD pipelines.
Jenkins can be configured to:
Git Repository
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Jenkins
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Maven / Gradle
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TestNG
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Selenium WebDriver
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Browser
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Web Application
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Test Results
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Jenkins Report
Maven is a build and dependency-management tool commonly used with Java Selenium projects.
A Maven project generally contains a pom.xml file that defines project dependencies and build configuration.
<project>
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>selenium-project</artifactId>
<version>1.0</version>
</project>
Common Maven commands include:
mvn clean
mvn compile
mvn test
mvn clean test
mvn package
A Selenium automation framework can use Maven to manage Selenium, TestNG, and other dependencies.
<dependencies>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
<version>YOUR_VERSION</version>
</dependency>
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>YOUR_VERSION</version>
<scope>test</scope>
</dependency>
</dependencies>
In a real project, dependency versions should be selected and maintained according to the project's compatibility requirements.
A CI system can execute Selenium tests using a Maven command such as:
mvn clean testThe command can trigger the configured test suite and execute the Selenium automation tests.
TestNG provides test execution features such as annotations, assertions, grouping, parameterization, Data Providers, parallel execution, and reporting.
When TestNG is integrated into CI/CD, the pipeline can automatically execute the same test suite after code changes.
Git Push
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Jenkins
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Maven
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TestNG
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Selenium Tests
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Results
A TestNG XML suite can define which test classes should be executed.
<suite name="Regression Suite">
<test name="Selenium Tests">
<classes>
<class name="tests.LoginTest"/>
<class name="tests.SearchTest"/>
<class name="tests.CheckoutTest"/>
</classes>
</test>
</suite>
The CI pipeline can invoke the Maven/TestNG configuration associated with this suite.
Continuous Testing means performing automated testing continuously throughout the software delivery lifecycle instead of waiting until the end of development.
Selenium can contribute to continuous testing by automatically validating web application functionality after builds or deployments.
Code
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Build
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Unit Tests
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Integration Tests
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Selenium UI Tests
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Reports
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Deployment Decision
Shift-left testing means moving testing activities earlier in the software development lifecycle.
Instead of discovering defects only after development is complete, automated tests can execute during development and CI builds.
Traditional Approach:
Development ---------> Testing ---------> Release
Shift-Left Approach:
Development
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+---- Testing
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+---- Automation
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+---- CI Validation
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Release
A smoke test suite contains a small set of important tests used to determine whether the application is stable enough for further testing.
Examples include:
A CI pipeline can execute smoke tests immediately after deployment to a test environment.
Regression testing verifies that existing functionality continues to work after application changes.
A CI/CD pipeline can automatically execute a larger Selenium regression suite after successful builds.
Application Change
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Build
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Smoke Tests
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Regression Suite
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Report
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Release / Feedback
Selenium automation can be configured to execute tests against different browsers.
| Browser | Example Use |
|---|---|
| Chrome | Primary browser validation |
| Firefox | Browser compatibility testing |
| Edge | Browser compatibility testing |
For larger suites, Selenium Grid or cloud browser infrastructure can be integrated with the pipeline.
Selenium Grid allows Selenium tests to run on remote browser environments and can support parallel execution.
CI/CD Server
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Test Execution
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+----------+----------+
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v v v
Chrome Firefox Edge
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+----------+----------+
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Reports
This architecture can help teams execute browser compatibility suites as part of automated pipelines.
CI servers may not have a normal desktop environment available. Selenium tests can therefore be configured to run browsers in headless mode when supported and appropriate.
ChromeOptions options = new ChromeOptions();
options.addArguments("--headless");
WebDriver driver = new ChromeDriver(options);
Headless execution can be useful for server-based automation environments.
Applications commonly have multiple environments such as Development, QA, Staging, and Production.
Development
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QA
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Staging
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Production
Selenium tests may be configured to run against a specific environment depending on the pipeline stage.
Environment-specific values should generally be configurable rather than hard-coded directly into every test.
Environment = QA
URL = https://qa.example.com
Environment = Staging
URL = https://stage.example.com
These values can be supplied through pipeline variables, configuration files, system properties, or other project-specific configuration mechanisms.
Maven properties can be used to pass configuration values during execution.
mvn test -Denv=qaThe automation framework can read the selected environment and configure the test execution accordingly.
String environment = System.getProperty("env", "qa");
System.out.println("Environment: " + environment);
This allows the same test code to be executed with different runtime configurations.
CI Pipeline
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Select Environment
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+---- QA
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+---- Staging
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+---- Production
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Run Selenium Tests
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Generate Report
Test reports are an important part of CI/CD because they communicate whether automated tests passed or failed.
Common reporting solutions used in Selenium ecosystems include:
The exact reporting solution depends on the framework and CI platform.
Screenshots can be captured when Selenium tests fail. These screenshots can then be stored as pipeline artifacts for debugging.
Test Failure
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Capture Screenshot
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Save Screenshot
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Attach / Archive Artifact
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Developer or Tester Investigates
Logs provide information about what happened during automated execution.
Useful logging information may include:
Passwords, tokens, and other sensitive information should not be written to logs.
A CI pipeline can fail for different reasons.
| Failure Type | Possible Cause |
|---|---|
| Build Failure | Compilation error or dependency problem. |
| Unit Test Failure | Application or unit-level defect. |
| Selenium Failure | UI defect, synchronization issue, locator issue, or environment problem. |
| Infrastructure Failure | Browser, server, network, or execution environment issue. |
| Deployment Failure | Problem during application deployment. |
A CI/CD pipeline can be divided into logical stages.
Stage 1: Checkout
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Stage 2: Build
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Stage 3: Unit Test
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Stage 4: Integration Test
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Stage 5: Selenium Test
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Stage 6: Report
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Stage 7: Deploy
Jenkins Pipeline can be represented using a Jenkinsfile.
pipeline {
agent any
stages {
stage('Checkout') {
steps {
checkout scm
}
}
stage('Build') {
steps {
sh 'mvn clean compile'
}
}
stage('Test') {
steps {
sh 'mvn test'
}
}
}
}
On Windows-based Jenkins agents, equivalent commands may use the appropriate Windows shell step instead of sh.
pipeline {
agent any
stages {
stage('Checkout') {
steps {
checkout scm
}
}
stage('Build') {
steps {
sh 'mvn clean compile'
}
}
stage('Selenium Tests') {
steps {
sh 'mvn test'
}
}
}
}
The actual Jenkinsfile should be adapted to the project's operating system, repository, test commands, browser infrastructure, and reporting configuration.
A webhook can notify a CI system when a repository event occurs.
Developer
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Git Push
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Repository
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Webhook
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CI Server
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Pipeline Starts
This enables automated execution without requiring a developer or tester to manually start every build.
Automation suites can also be executed on a schedule.
Examples include:
Scheduled Trigger
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CI Pipeline
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Selenium Regression Suite
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Report
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Notification
CI/CD systems can notify teams about pipeline results.
Notifications may be sent through communication or collaboration tools configured by the organization.
A notification can contain:
Pipeline Failure
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Check Build Logs
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Check Test Report
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Identify Failed Test
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Check Screenshot / Video
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Check Application Logs
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Identify Root Cause
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Fix
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Run Pipeline Again
A flaky test is a test that sometimes passes and sometimes fails without a corresponding intentional change in the application.
Flaky Selenium tests can be caused by:
Flaky tests should be investigated and fixed rather than simply ignored.
CI environments can expose synchronization problems that may not appear consistently on a developer's local machine.
Explicit waits are often useful when Selenium must wait for a specific application condition.
WebDriverWait wait =
new WebDriverWait(driver, Duration.ofSeconds(10));
WebElement element = wait.until(
ExpectedConditions.visibilityOfElementLocated(
By.id("username")
)
);
Synchronization should be designed around application behavior rather than arbitrary long delays.
Large Selenium suites can take considerable time. Parallel execution can reduce total execution time when the framework, environment, test data, and WebDriver management are designed for concurrency.
CI Server
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+------ Thread 1 ------ Chrome
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+------ Thread 2 ------ Firefox
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+------ Thread 3 ------ Edge
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+------ Thread 4 ------ Chrome
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Combined Test Results
When tests run concurrently, WebDriver instances should generally be isolated per test or thread.
A common framework approach is to use a driver factory with thread-local driver management.
Thread 1 -> WebDriver 1 -> Browser 1
Thread 2 -> WebDriver 2 -> Browser 2
Thread 3 -> WebDriver 3 -> Browser 3
Sharing one WebDriver instance across unrelated parallel tests can cause test interference.
Page Object Model can be combined with CI/CD to create a maintainable Selenium framework.
CI/CD
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TestNG Tests
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Page Objects
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WebDriver
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Application
CI/CD controls when and how the tests execute, while POM helps organize Selenium interaction logic.
Data-driven tests can also run inside CI/CD pipelines.
CI Pipeline
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TestNG
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@DataProvider
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+---- Test Data 1
+---- Test Data 2
+---- Test Data 3
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Selenium Tests
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Reports
This allows one automated workflow to validate multiple test-data combinations.
Pipeline artifacts are files produced during a build or test execution that can be stored for later investigation.
Examples include:
Test Execution
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+---- HTML Report
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+---- Screenshots
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+---- Logs
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+---- Test Results
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Pipeline Artifacts
Security is important when automation pipelines access source repositories, test environments, credentials, databases, or deployment systems.
Test data should be selected carefully when pipelines interact with shared or production-like environments.
Sensitive information should be protected and should not be exposed through screenshots, reports, logs, or source code.
Automation pipelines should ideally use controlled test environments so that automated tests do not unintentionally affect unrelated users or production systems.
Application Build
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Test Environment
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Automated Selenium Tests
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Validation
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Release Decision
A quality gate is a condition that must be satisfied before the pipeline proceeds to a later stage.
Examples include:
Code Commit
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Build
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Unit Tests
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Integration Tests
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Selenium Tests
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Quality Gate
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Deploy to Staging
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Validation
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Production Release
| Feature | Continuous Delivery | Continuous Deployment |
|---|---|---|
| Automated Build | Yes | Yes |
| Automated Testing | Yes | Yes |
| Production Ready | Yes | Yes |
| Production Deployment | May require approval | Can be automatic after required checks |
selenium-ci-cd-project
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|-- src
| |-- test
| |-- java
| |-- tests
| | |-- LoginTest.java
| | |-- SearchTest.java
| | |-- CheckoutTest.java
| |
| |-- pages
| | |-- LoginPage.java
| | |-- SearchPage.java
| | |-- CheckoutPage.java
| |
| |-- utilities
| |-- DriverFactory.java
| |-- ConfigReader.java
| |-- ScreenshotUtility.java
|
|-- testng.xml
|-- pom.xml
|-- Jenkinsfile
|-- README.md
|-- .gitignore
Suppose a developer modifies the login functionality of a web application.
1. Developer modifies application code.
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2. Developer commits changes.
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3. Developer pushes changes to Git.
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4. CI server receives repository event.
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5. CI server checks out latest code.
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6. Maven builds the project.
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7. Unit tests execute.
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8. Selenium TestNG tests execute.
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9. Browser automation validates login.
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10. Test reports are generated.
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11. Screenshots/logs are stored if needed.
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12. Pipeline determines the next stage.
Developer
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Git Repository
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CI Server
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+---------+---------+
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Build Configuration
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Maven
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TestNG
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Selenium WebDriver
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+------+------+------+
| | | |
v v v v
Chrome Firefox Edge Grid
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+------+------+------+
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Web Application
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Test Results
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+------+------+------+
| | | |
v v v v
Report Logs Screenshots Artifacts
git clone <repository-url>
cd selenium-project
mvn clean compile
mvn test
git status
git add .
git commit -m "Update Selenium automation"
git push
CI/CD is a set of practices and automation processes used to integrate code, validate changes, and deliver software efficiently.
Continuous Integration is the practice of frequently integrating code changes and automatically building and testing them.
Continuous Delivery automatically builds and validates software so that it remains ready for release, with production deployment potentially requiring approval.
Continuous Deployment automatically deploys successfully validated changes to production according to the configured pipeline.
Jenkins is an automation server commonly used to create CI/CD pipelines and automate build, test, and delivery tasks.
Selenium tests can be executed automatically by a CI/CD pipeline after application or automation code changes.
Maven manages Java project dependencies and provides standardized commands for compiling and testing projects.
A Jenkinsfile is a text-based pipeline definition that describes how Jenkins should execute stages of a pipeline.
Continuous testing means executing automated tests continuously throughout the software delivery lifecycle.
Git provides version control and allows CI systems to obtain and validate source-code changes.
A webhook can notify an external system such as a CI server when a repository event occurs.
A build pipeline is an automated sequence of stages used to build, test, validate, and potentially deploy software.
Parallel Selenium tests can run through multiple isolated browser sessions, often using Selenium Grid or other browser execution infrastructure.
Reports provide visibility into automated test results and help teams identify failures and investigate problems.
Artifacts are files produced during a pipeline execution, such as reports, screenshots, logs, test results, or application packages.
A flaky test is a test that produces inconsistent results without a corresponding intentional application change.
They allow pipeline and application configuration to change between environments without modifying the test source code.
A quality gate is a required condition that must be satisfied before the pipeline proceeds to a subsequent stage.
Shift-left testing moves testing and validation activities earlier in the software development lifecycle.
Integration allows browser automation to execute automatically and provide rapid feedback whenever relevant application or automation changes occur.
| Concept | Description |
|---|---|
| CI | Continuous Integration. |
| CD | Continuous Delivery or Continuous Deployment. |
| DevOps | Practices that encourage collaboration and automation across development and operations. |
| Git | Version control system. |
| Jenkins | Automation server used for CI/CD. |
| Maven | Java build and dependency-management tool. |
| TestNG | Testing framework commonly used with Selenium Java projects. |
| Selenium | Browser automation technology for web applications. |
| Pipeline | Automated sequence of build, test, validation, and delivery stages. |
| Webhook | Event notification used to trigger automation. |
| Artifact | File generated or stored during pipeline execution. |
| Quality Gate | Condition required before moving to the next pipeline stage. |
| Continuous Testing | Automated testing performed throughout the delivery lifecycle. |
CI/CD is a modern software delivery approach that automates the integration, building, testing, and delivery of software. Continuous Integration focuses on frequently integrating and validating code changes, while Continuous Delivery and Continuous Deployment focus on preparing or automatically releasing validated software.
For Selenium automation, CI/CD makes it possible to execute browser tests automatically after code changes, application builds, or deployments. Tools such as Git, Maven, TestNG, Jenkins, Selenium WebDriver, reporting systems, and Selenium Grid can work together to create an automated testing pipeline.
A typical Selenium CI/CD workflow is:
Git
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CI Server
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Build
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TestNG
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Selenium
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Browser
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Application
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Reports
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Deployment / Feedback
Learning CI/CD helps Selenium testers understand how automated tests fit into real-world Agile and DevOps development workflows.
Learn Selenium automation, TestNG, Page Object Model, reporting, framework development, Git, Jenkins, and CI/CD concepts through the following resources:
JustAcademy's Selenium curriculum includes CI/CD and continuous testing topics along with Jenkins integration, Git and version control, automated test execution in pipelines, and continuous testing practices. :contentReference[oaicite:0]{index=0}
Final Takeaway: CI/CD connects development, automated testing, and software delivery into a repeatable workflow. For Selenium testers, integrating automation into CI/CD means that browser tests can become a regular part of the software delivery process, providing automated feedback and making test execution more consistent and scalable.
