A Quick Guide to Smoke Testing

Characteristics of Smoke Testing

• It is always documented.
• It can be stable as well as unstable.
• It is usually scripted.
• It is a type of regression testing.
• Smoke Tests are usually quick to run.
• Smoke Tests are generally automated.
• Smoke Test covers the broader functionality of the software.
• It can be performed by software developers, software testers, or by QA engineers.

When to do Smoke Testing?

Smoke Testing is done when there is the addition of new functionality in software. It is also conducted when integrating new builds with the existing ones in the QA/Staging environment. Smoke Test ensures that all the functionalities are working correctly or not.

In this software testing method, the software development team deploys the build in the Quality Assurance (QA). The subsets of test cases are picked, and then the software testing team runs test cases on that build. The testing and QA team test the software application against the critical functionalities. There are a series of test cases designed to detect the errors from the build. If the test passes, QA and Testing teams continue with functional testing and then regression testing.

In case of failure, the application is handed back to the software development team. Whenever there is any change in the build, there is a need to do smoke testing to ensure the stability of that build.

Example:- A new login and signup buttons are added in a form, and a build is deployed with the code changes. Then we need to perform smoke testing on that build.

Who Can do Smoke Testing?

After deploying the software build into the QA environment, It is generally done by the software testing team/QA engineers/QA lead. Whenever there is any new build in the application, the QA team considers the important functionalities of the software to perform smoke testing. QA team checks for bugs and issues in the application that is under smoke test.

Why Smoke Testing?

Smoke Testing plays a vital role in software development as it verifies the accuracy of software systems in their initial stages. By conducting smoke tests, we can save lots of time and test efforts. As a result, smoke testing is needed to bring the system into a good state. Besides, other types of testing can begin only after a successful smoke test. Apart from this, here are the other reasons to conduct smoke testing.

• By performing a smoke test, all the bugs and show stoppers are discovered.
• It is needed to identify the defects in the initial stage of development.
• By conducting smoke testing, we can easily simplify the detection and correction of the majority of defects.
• Smoke testing helps the QA team to find errors in functionality that may have occurred due to code change.
• It is carried out to check system stability.
• It is done for the conformance of requirements.
• It is conducted to check the overall functionality of the software.

How to do Smoke Testing?

There are mainly two types of smoke testing techniques. Manual smoke testing and automated smoke testing. Though smoke testing is generally done manually, there is the possibility of conducting it through automation. While testing may vary from software testing companies to the requirement of software testing projects. Let us understand both types of smoke testing in brief.

Manual Smoke Testing

Generally, Smoke Testing is done manually. Its approach varies from one software testing company to another. It ensures that navigation and flow of the application are as expected and functionalities are up to date or not.

As soon as the build is deployed in QA, priority-wise functionalities are tested to find defects in the system. If the test is successful, it can further proceed for functional testing. But If the testing fails, then the build is sent back to the software development team for corrections. After changes are done, the QA team again starts with smoke testing on the system’s latest version. Smoke Testing is performed on the latest build and then the tested build is integrated with previously tested builds.

Automated Smoke Testing

Automation Testing is generally used for Regression Testing. However, you can also design a set of automated test cases for the Smoke Test. Whenever there is a new build deployed, software developers can check it immediately with the help of Automated Smoke Testing.

Instead of repeating all the test cases manually, recorded cases of the smoke test are repeated whenever a new build is deployed. It checks whether the functionalities are working fine or not. In case if the automated testing fails, then the builds are corrected and immediately redeployed. By using automated smoke testing, we can save a lot of time and effort and ensure a quality build.

Smoke Testing Life Cycle

The below flowchart shows the complete life cycle of Smoke Testing. As soon as the build is deployed in the QA environment, test cases are executed on it. If the test cases are pass then the build further proceeds for functional and regression testing. But if the build fails, then it is sent back to the development team to fix it. This Smoke Testing Cycle continues until all the issues in the build are resolved.

Using automated tools in smoke testing, software testers can record all the necessary steps in manual testing and perform that automatically. Here is is the list of top smoke testing tools.

Smoke Testing Tools

When it comes to software testing, there are many software testing tools available in the market. But there are very few tools for smoke testing. Here is the list of the most popular ones.

• Selenium
• PhantomJS
• Bamboo
• QF-test

Advantages of Smoke Testing

Here are few listed advantages of smoke testing.

• Smoke Testing is straightforward to perform.
• It identifies the defects in the early stage.
• It improves the quality of the overall software system.
• It reduces the risk.
• Tracking progress becomes effortless.
• It saves a lot of testing time, effort, and resources.
• It quickly detects critical errors.
• Correcting the detected errors becomes easy through smoke testing.
• Smoke Testing runs quickly.
• It minimizes the integration risks.

Smoke Test Cases Examples

Here are smoke test case scenarios or you can say smoke testing examples.

Test ID	Description	Steps	Expected Outcome	Actual Outcome	Status
01	To verify login functionality.	1. Launch the app. 2. Visit the login page. 3. Enter login credentials. 4. Click Login.	Login Successful	Login Successful	Pass
02	To verify video play functionality.	1. Go to the video page. 2. Play the video.	Video Starts playing.	The video player does not pop up.	Fail

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Smoke Testing vs. Sanity Testing

Smoke Testing Vs. Sanity Testing is one of the most conducive topics in software testing. There is a lot of literature on this topic and most of it is unclear. So here are the clear difference between smoke testing and sanity testing.