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Selenium in continuous integration testing:

Continuous integration is a development practice that requires developers to integrate code into a shared repository several times a day.

Problems before Continuous Integration:

A group of developers who are making changes in the source code that is present in the source code repository, this repository can be a git repository. When the entire source code in the application is built, it is built by tools like ant, maven, etc.

After that, the built application will be deployed onto the test server for testing. if there is any bug in the code developers are notified with the help of a feedback loop that is shown on screen or if there is no bug then the application is deployed onto the production server for release.

There is a developer who is waiting for a long time in order to get test results.

At first, the entire source code of the application is first built then it is tested so if there is any bug in the code, developers have gone through the entire source code of the application which is very difficult and time-consuming.

Software Delivery process is slow.

Resolving After Continuous integration:

Every commit made in the source code is built and tested.

No need for the developer to go through the entire source code of the application, they only check the source code which commits.

It also increases the frequency of new software releases.

Jenkins in Continuous Integration:

Jenkins is an open-source automation tool that can be used to run tests and build your software tool to ensure the functionality is working fine.  

Steps:

Install and download Jenkins.

 Type https://ocalhost:8080 in the browser and unlock Jenkins with a password.

Select Install suggested plugins and create the account of the first admin user.

Enter Jenkins URL in instance configuration.

To Configure Jenkins:

1. Click on manage Jenkins on your Jenkins dashboard then Global tool configuration.

2. Click on add JDK and enter its name and JDK path(untick install JDK).

3. Same done with Maven as above, after that click on save.

Create new jobs in Jenkins and enter Item’s name.

Select the project which you want to or for demo choose “Freestyle project” and fill all the details for a build.

Save the project and click on build now.

After that, it will build your project and trigger the build which you have given.

Jenkins Integrate with Git Repository:

Steps:

Install the Git Plugin:

Click on manage Jenkins on your Jenkins dashboard

Click on manage plugin and In the plugin page

Select the Git plugin.

Click on install without a restart.

Select the option Download now and install after restart button.

Shown “No update available”. 

Once plugins have been installed.

Go to Manage Jenkins and you will see your plugins listed among the rest.

Integrate Jenkins with GitHub:

Open Jenkins Dashboard with Jenkins URL.

Create new jobs in Jenkins and enter Item’s name.

Choose “freestyle project” and fill all the project information.

You will see the Git option under Source Code Management.

Enter Git URL to pull code from GitHub. (you must have an account on GitHub repository and fetch code over there).

If you get an error message then go to url=” https://git-scm.com/downloads” for git install because Git does not install on your local machine.

To check Git install or not, Open cmd and type git then you will get a message.

Once all setup is done, Then try again to add the git repository url.