shift-left-testing

Shift-left testing reduces defect costs by moving quality checks into early phases—requirements validation, design, and development—rather than waiting for late-stage testing. This includes TDD/BDD practices, design-level risk analysis, and CI/CD automation to catch issues when they're cheapest to fix.

The test pyramid prioritizes unit tests at the base for speed and coverage, integration tests in the middle, and fewer end-to-end tests at the top. This structure maximizes fast feedback and maintainability while minimizing brittle, slow tests.

Write tests before or alongside implementation, then automate them in CI/CD to run on every pull request. Unit tests provide immediate feedback, while integration and smoke tests validate broader functionality, enabling rapid iteration and early defect detection.

Yes. Design-level testing includes risk analysis and testability reviews during requirements and design phases, catching ambiguities and gaps before implementation begins, reducing rework and ensuring clearer acceptance criteria.

Risk-based regression selection prioritizes tests based on change impact and defect history, reducing test execution time while maintaining coverage. Pair this with the test pyramid to focus on high-value unit and integration tests first.