Smoke and sanity testing are essential in the development of a project. A smoke test is used to validate whether or not the fundamental features of a given build are operating correctly. The purpose of sanity testing is to determine whether or not the build is ready to proceed to the next step of testing. https://www.sterlingtechnolabs.com/difference-between-smoke-testing-and-sanity-testing/

1. Sanity Testing Vs. Smoke Testing
Difference Between Them

2. What is Smoke Testing?
Smoke testing is a type of software testing service designed to ensure that the program's acute
functionalities function properly. This is a subset of acceptance testing, used to test all the
functions of the system/product.
Rather than eliminating errors in the software's core, smoke testing aims to eliminate errors in the software's code.
This prevents futile efforts in the later phases of the SDLC by detecting errors at the preliminary stage. Smoke
testing provides insights at an early stage, allowing integration issues and other errors to be detected earlier.
You can perform a smoke test manually or using automated tools. Automated smoke tests are frequently initiated by
the process that generates the build. By automating the tests, you can run them faster and get feedback faster,
allowing you to respond more quickly.

3. What is Sanity
Testing?
To ensure that bugs have been fixed after
the build, sanity testing is performed. In
addition to being referred to as a subset of
regression testing, it is a software testing
service that serves as a checkpoint to
determine whether or not screening for the
project can continue.
There is a misunderstanding that smoke
testing and sanity testing are the same, but
each of these types of testing has its own
goals and considerations.
Sanity testing is done to determine whether newly added modules
to an existing software build are functioning as expected and are
ready to move on to the next stage of testing. It is a subset of
regression testing and offers quality assurance services by
assessing the efficacy of software regressions.
Sanity testing is primarily used to ensure that the proposed
functionality or changes function as intended. The sanity test also
determines whether seamless end-to-end testing of the build can
be carried out if minor changes to the code need to be made. The
testing team, however, dismisses the software build if the test is
unsuccessful, resulting in time and money savings.
After the Quality Assurance team has approved and cleared the
smoke test, sanity testing is carried out. Instead of performing
in-depth testing, the main goal of this testing is to validate the
application's functionality. The test cases for execution are
chosen when sanity testing is done for a module, functionality,
or entire system and they touch only the important bits and
pieces. Apparently, it is a wide but shallow test.

4. Sanity Testing vs. Smoke
Testing
In addition to determining whether the code is eligible for additional tests, smoke testing and sanity
testing are indeed quick to check the code's fundamental functionality. Smoke testing, on the other
hand, verifies that a program's critical functionalities operate without error, while sanity testing verifies
that the proposed functionality performs as expected.
The majority of the time, we swap smoke testing and sanity testing. Let's examine the difference
between these two testing procedures in more detail to dispel this misunderstanding.

5. Let's Now Look at How They
are Different From One
Another:
Smoke testing aims to validate stability, whereas Sanity testing aims to validate reason.
Smoke testing is performed by software developers and testers, whereas sanity testing is performed
exclusively by testers.
During smoke testing, a system's important functions are verified, while during sanity testing, new
functions are verified including bug fixes.
Sanity testing is part of regression testing, while smoke testing is part of acceptance testing.

6. In contrast to smoke testing, sanity testing does not have any documented or scripted procedures.
A smoke test verifies the entire system from beginning to end. As opposed to sanity testing, which
verifies a specific component of the system, sanity testing examines the entire system.
While sanity testing verifies that recently introduced functionalities, bugs, etc., have been fixed,
smoke testing verifies that the program's critical functionalities are operating without error.
During smoke testing, the software build could be either stable or unstable. At the time of sanity
testing, the software build is largely stable.

7. Initial builds are subjected to smoke testing, while relatively stable builds are subjected to sanity
testing.
Smoke testing is a component of basic testing, whereas sanity testing is a component of regression
testing.
Typically, smoke testing is carried out after each new build release. However, sanity testing is set up
when there isn't enough time for extensive testing.

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