How would you verify that a requirement has been implemented correctly? What tools do you know?

To verify the correctness of the implementation of a requirement, it is important to go through several stages:

1. Requirements analysis — ensure that the requirements are clearly and unambiguously formulated.
2. Testing — write and execute tests that cover all usage scenarios of the requirement.
3. Code and documentation review — verify that the implementation complies with the specifications.
4. Demonstration to the customer or stakeholders — obtain confirmation that the functionality meets expectations.

Tools that can be used:

• JIRA, TestRail — for requirements management and test case management.
• Postman, SoapUI — for API testing.
• Selenium, Cypress — for automated UI testing.
• Jenkins, GitLab CI — for automating test runs.
• SonarQube — for code quality analysis.

Example: if the requirement is to add a "Save" button to a form, the verification will include:

• A test case that checks if the button is displayed.
• A test that data is saved when clicking the button.
• A review to ensure the code adds the button in the correct place with the correct behavior.