Sanity Testing and Smoke Testing are commonly used software testing techniques that help verify whether a software build is ready for further testing. While both are performed at the early stages of testing, they serve different purposes and are applied under different circumstances. Understanding their differences helps improve testing efficiency and software quality.
- Both techniques are used to validate software builds before detailed testing.
- They differ in terms of purpose, scope, timing, and test coverage.
- Choosing the appropriate technique helps reduce testing effort and identify issues early.
Sanity Testing
Sanity Testing is a software testing technique performed after minor changes, bug fixes, or enhancements to verify that the modified functionality works correctly. It is a focused and narrow form of testing that ensures the application is stable enough for further testing.
Example: After fixing a login issue, the tester performs Sanity Testing to verify that users can log in successfully and the bug has been resolved without affecting the related functionality.
Smoke Testing
Smoke Testing is a software testing technique performed on a new build to verify that the application's critical functionalities are working correctly. It is a broad and shallow test that determines whether the build is stable enough for further testing.
Example: After receiving a new software build, the tester performs Smoke Testing to verify that key features such as login, search, and navigation are working correctly before proceeding with detailed testing.
Sanity Testing Vs Smoke Testing
| Aspect | Sanity Testing | Smoke Testing |
|---|---|---|
| Purpose | Verifies that specific bug fixes or recent changes work correctly. | Verifies that the major functionalities of a new build are working. |
| Scope | Narrow and focused on affected areas. | Broad and covers critical functionalities. |
| When Performed | After bug fixes, patches, or minor enhancements. | After receiving a new software build. |
| Objective | Validate the modified functionality. | Determine whether the build is stable for further testing. |
| Test Coverage | Limited to the changed modules. | Covers the application's essential features. |
| Execution Time | Usually takes less time due to limited scope. | Takes comparatively more time than sanity testing. |
| Test Cases | Mostly unscripted or selective. | Usually scripted and predefined. |
| Build Status | Performed on a stable build after changes. | Performed on every new build before detailed testing. |
| Result | Confirms that the recent changes work as expected. | Confirms that the build is suitable for comprehensive testing. |