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Software Engineering | Differences between Sanity Testing and Smoke Testing

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Smoke Testing is a type of testing which is done to assure that the acute functionalities of the program is working fine. It is also known as a subset of acceptance testing and it is used to test all over the function of the system/product. on the other hand 

Sanity Testing is done to check the bugs have been fixed after the build. and it is also known as a subset of regression testing. There is confusion between smoke testing and sanity testing that these two types of testing are the same, but both smoke testing and sanity testing have their own objectives and priorities. So, 

Sanity testing and smoke testing are two important testing techniques in software engineering that are often used to check the basic functionality of a software application. Although both techniques are used to check the basic functionality of a software application, there are some key differences between them.

Smoke Testing: Smoke testing is a testing technique that is used to check the basic functionality of a software application or system after a build or release. This testing is done to ensure that the build is stable enough for further testing. Smoke testing involves a quick and shallow check of the software application to verify that it is functioning properly and that there are no critical defects that could prevent further testing. Smoke testing is typically performed by testers or developers before any detailed testing is performed.

Sanity Testing: Sanity testing is a testing technique that is used to check that specific functionality or components of a software application are working as expected after making changes or fixing defects. The main objective of sanity testing is to verify that the changes made to the application have not introduced new defects or issues in the specific functionality or components. Sanity testing is typically performed after regression testing and is focused on specific areas of the application.

Key differences between smoke testing and sanity testing are:

Objective:
Smoke testing aims to ensure that the build is stable enough for further testing, while sanity testing aims to verify that specific functionality or components of the application are working as expected.

Scope:
Smoke testing covers the entire system or application, whereas sanity testing is focused on specific functionality or components.

Timing:
Smoke testing is typically performed after a new build or release, while sanity testing is performed after making changes or fixing defects.

Depth:
Smoke testing is a shallow check of the software application to verify that there are no critical defects, while sanity testing is a more detailed check of specific functionality or components of the application.

In summary, smoke testing and sanity testing are both important testing techniques that are used to ensure the quality and reliability of software applications. Smoke testing is used to ensure that the build is stable enough for further testing, while sanity testing is used to verify that specific functionality or components are working as expected after making changes or fixing defects. Smoke testing is a shallow check of the entire application, while sanity testing is a more detailed check of specific functionality or components of the application.

Here in this post, we will show the difference between Smoke Testing and Sanity Testing. Below is a detailed comparison:

Smoke Testing Sanity Testing
Smoke testing is done to assure that the acute functionalities of program is working fine.  Sanity testing is done to check the bugs have been fixed after the build.
Smoke testing is also called subset of acceptance testing.  Sanity testing is also called subset of regression testing.
Smoke testing is documented. Sanity testing isn’t documented.
Smoke testing is performed by either developers or testers. Sanity testing is normally performed by testers.
Smoke testing may be stable or unstable. Sanity testing is stable.
Smoke testing is scripted. Sanity testing is usually not scripted.
Smoke testing is done to measures the stability of the system/product by performing testing. Sanity testing is done to measures the rationality of the system/product by performing testing.
Smoke testing is used to test all over function of the system/product. Sanity testing is used in the case of only modified or defect functions of system/products.
Smoke testing can be performed either manually or by using automation tools. Sanity testing is commonly executed manually, not by using any automation approach.
Smoke testing is performed when new product is built. Sanity testing is conducted after the completion of regression testing.
It includes all of the system’s essential basic functionality.  It includes only those modules where change in code is made. 
Smoke Testing firstly performs on the initial build. smoke testing is done first.  Sanity Testing is done on stable builds or for the introduced new features in the software.
Smoke testing can be carried out either way-manually or automatically.  Without using test cases or scripts sanity testing can be carried out.
There is end-to-end system verification done in smoke testing. A specific component gets verified in sanity testing. 
In the smoke testing process, the software build could be stable or unstable.  During sanity testing, the software build is comparatively stable.
For every new build release smoke testing is carried out. Sanity testing is carried out when in-depth testing is not possible because of short time.
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Last Updated : 19 Apr, 2023
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