As a follow, up to my Regression testing post a few weeks ago, Sanity testing is almost a subset of it because it is performed when we do not have enough time to do the testing. It is used to carry out the checking on whether the bugs reported in the previous build are fixed with regression being introduced to fix these issues not breaking any of the previously working functionality. Sanity checks to see if the functionality is working as intended/expected instead of doing the entirety of regression testing. The test helps avoid wasting time and cost involved if the build has failed. After the regression introduction has been completed Sanity starts to kick into full swing. With it checking the defeat fixes and changes done to the software application without breaking the core functionality. It is usually a narrow and deep approach to testing, needing to concentrate limited and main features of testing in detail. Sanity testing is usually non-scripted helping to identify the dependent missing functionalities. It is used to determine if sections of the application are still working after minor changes. The objective of this testing is to not verify thoroughly the new functionality but rather to determine if that the developer has applied some rationality while producing the software. For example, if your scientific calculator gives the result of 2+2 = t! then there is no point in testing the advanced functionalities like sin 30 + cos 50. Sanity testing is usually compared to Smoke Testing which is used after software building is completed to ascertain the critical functionalities of the program is working fine. But smoke testing is for another topic for another day. All and all the website I looked at was very insightful into what sanity testing is and what it does.