How is functional testing conducted?

Functional testing is performed to verify compliance with functional requirements of the specification.

Main stages:

Requirements analysis: Study specifications, user stories, Use Cases for a complete understanding of the expected system behavior.
Test planning: Define scope, select methods, tools, and develop a test strategy.
Test artifacts development: Write test scenarios (Test Cases), test data.
Test execution: Run tests in the test environment.
Results analysis: Compare actual results with expected, identify defects.
Reporting: Document test results, create defect reports.
Retesting: Verify fixed defects.

Types of functional testing:

Unit Testing: Testing individual components or functions.
Integration Testing: Testing interaction between modules.
System Testing: Testing the entire system as a whole.
Regression Testing: Ensuring code changes do not introduce new defects.
Data-Driven Testing: Running the same test with different input data sets.
UI Testing: Testing interaction with the user interface.
API Testing: Testing software interfaces.
Acceptance Testing: Verifying system compliance with business and user requirements.

Automation tools for functional testing: