Hi Pomina,

What is Continuous Integration: Continuous integration allows for extremely fast and flexible development and release of code. It is also applicable to the migration of metadata. It involves short-term development, meaning that Salesforce product requirements can be adjusted without the developers having to start from scratch. In continuous integration, developers pull the latest code from a central code repository and work on completely separate sections of code at the same time — committing and building regularly. This constant committing and automated building is the key to continuous integration as it prevents disastrous integration late in the cycle between developers working on the same project. This automation is key to making continuous integration easier and faster than the normal development cycle. Continuous and automatic testing for inconsistencies occurs throughout the process, alerting developers immediately when an inconsistency or error is found within their code. This allows for constant small adjustments to prevent code inconsistencies rather than the major time-consuming reworking of code at a later stage.

For a robust quality assurance process, use a continuous integration system, such as Jenkins, to run test deployments for each addition of customizations to the source control repository. You can perform these deployments in a dedicated sandbox for continuous integrations. Apex tests are executed as part of each deployment.  Configure the Force.com Migration Tool to enable tests. See Tips for Configuring the Force.com Migration Tool to Run Tests.

You can use a continuous integration system to automate deployments. For example, you can use Jenkins to automate deployments to the user acceptance testing (UAT) sandbox.

The following diagram shows the relationship between the continuous integration server, sandbox, and source control.

Please check with below link on how to achieve continuous integration in Salesforce.

• https://www.flosum.com/salesforce-continuous-integration/
• https://developer.salesforce.com/forums/?id=906F0000000D6jbIAC

Hope this helps.

Please make sure to mark this as solved if it's helpful so that it gets removed from the unanswered queue which results in helping others who are encountering a similar issue.

Thanks,
Nagendra