Sanity Testing:

1. Subset of Regression Testing:
   Sanity testing is a subset of regression testing and focuses on the smaller section of the application.
2. Unscripted:
   Most of the times sanity testing is not scripted.
3. Not documented:
   Usually sanity testing is undocumented.
4. Narrow and deep:
   Sanity testing is narrow and deep approach of testing where limited functionalities are covered deeply.
5. Performed by testers:
   Sanity testing is normally performed by testers.

Advantages of Sanity Testing:

• Sanity testing helps in quickly identify defects in the core functionality.
• It can be carried out in lesser time as no documentation is required for sanity testing.
• If the defects are found during sanity testing, project is rejected that is helpful in saving time for execution of regression tests.