testing Positive test cases and negative test cases

Positive testing and negative testing are essential components of software testing that help ensure the reliability and functionality of software applications. While positive testing focuses on expected behaviors and validates the system under normal conditions, negative testing uncovers defects and ensures the software can handle unexpected scenarios gracefully. By incorporating both approaches into the testing process, software testers can enhance the overall quality of the software and provide a seamless user experience.

  • From that point on, I started to learn how to break my own code and it was a good practice which did wonders for my career as a developer and eventually became the focus of my career as a professional software tester.
  • Negative Testing is a part of testing which tests what an application is not supposed to do i.e. what is not defined in the documents or requirements.
  • Put simply, you write a negative test case by selecting the invalid input data or undesired user behavior that you acquire by performing positive test case steps.
  • In the worst case these will display errors from the database revealing the underlying architecture and exposing your API to various forms of attack.
  • In this strategy you write the test cases for values outside the boundary limits.

Positive testing, also known as “normal” or “happy path” testing, focuses on validating the software’s expected behavior under normal operating conditions. It involves testing the system using valid inputs and expected functionalities to ensure it functions as intended. The purpose of this testing is to make sure that the application perform well as per the business requirements. https://www.globalcloudteam.com/ While most testers understand the need for positive software testing—checking to see whether a given application works as expected—many underrate the importance of negative testing. There are many types of testing in the world, and each one has its own purpose. Some are more commonly used than others, but each is necessary to ensure that your product functions correctly.

What Is the Purpose of Negative Testing?

For instance, when we see an email box, consider all potential entries except the actual email format. Similarly, if we see a picture upload box, we must verify it with every available file. Suppose that we have performed positive testing on an e-commerce website to ensure that everything is in order. But what if there is indeed a flaw in our system which allows someone to perform SQL injection and wipe out all of our information? Negative testing is also intended to stop these types of situations. Asking QA to test all 256 input values by hand would be a bad idea, but it’s the kind of automation computers are really good at.

negative testing examples

Or what if someone tries to do an SQL injection and erase all our data from the database. I understand I cannot do that if the type of the argument is long or int or float, but what about byte? It would be fairly easy to write a piece of code to populate a structure with all invalid values and just run the test that would expect ArgumentException for all of them.

Severity & Priority in Testing: Differences & Examples

As a freelancer, she has worked on various projects to create technical documentation, user manuals, training materials, and other SEO-optimized content in various domains, including IT, healthcare, finance, and education. Now that you have become familiar with the different types of negative testing, let’s look at how to set up testing environments to run negative tests. Negative testing, also known as «fault injection» negative testing examples or «error path testing,» holds profound importance in software development. It encompasses the detailed test of a software application’s behavior when subjected to unforeseen circumstances. Considering the cost of bugs, System Science Institute at IBM reported that it is six times more expensive to fix a bug discovered during the implementation phase than to fix a bug identified during the design phase.

Reinfections can occur within 90 days, which can make it hard to know if a positive test indicates a new infection. Consider consulting a healthcare provider if you have any questions or concerns about your circumstances. Viral tests look for a current infection with SARS-CoV-2, the virus that causes COVID-19, by testing specimens from your nose or mouth. Negative testing determines the stability of the software under different conditions.

Negative Test Case Examples for Online Shopping Carts

It shows that software works only the way that is supposed to work. Any other workflow which is not valid for the particular software will not entertain by the software. Here we explore different types of Selenium locators and learn how they are used with different automation testing. Effectively classifying and prioritizing defects are crucial for efficient management. Defects are typically classified based on their severity and impact on the application under test, enabling a prioritization strategy that ensures immediate attention is given to critical issues.

negative testing examples

The main purpose of negative testing is to analyze the behavior of the software application by exposing it to invalid inputs. This is done to prevent the software application from crashing due to negative inputs and improvise its quality and stability. However, by performing positive testing, testers can only ensure that the application works adequately in normal scenarios. It is equally important to ensure that the software application handles unexpected conditions to ensure that it is completely bug and error-free.

Mobile App Testing

Often, testing tutorials will focus on writing a series of named, hand-crafted test cases; each might be in a separate function, consisting of at least three to four lines of code. I think this is unfortunate, because it makes «adding a test case» feel like a big deal – obviously, doing that for 256 different inputs would be horrible. It provides less safety instantly, but over time, at a global scale, it approaches the same high level of safety as covering the entire dataset does; statistically, of course. If you’re combining this set of flags with other sets of flags, that may generate more testing requirements. Note that PBT addresses some suggestions made in other answers, such as boundary testing, randomised testing, testing combinatorial code paths; see also this answer. TLDR; by making a stronger separation between data and code, you can avoid the need for creating unit tests which are geared towards specific data.

negative testing examples

As you can see, negative testing improves the testing coverage of your application. Using the negative and positive testing approaches together allows you to test your applications with any possible input data (both valid and invalid) and can help you make your application more stable and reliable. Thorough planning, test case design, and understanding of the software application’s performance and working are key for effective testing. Embracing emerging technologies, integrating with DevOps and Agile development practices, and adopting predictive and AI-driven approaches enhance the process.

Required Fields

It determines the capability of the software to prevent any negative flow and react as expected. Download this comprehensive user acceptance testing test case template to ensure that it matches the SRS document and meets all provided requirements. The document is designed to track individual applications, execution steps, and expected and actual results. In software testing, a false positive result refers to a failed test case result that occurs when there is no defect and the SUT is functioning properly. When a test case passes but a defect is present in the SUT, the result is known as a false negative result. Use this test case planning and execution template to map out test plans for your software development project, execute test case steps, and analyze test data.

This model is commonly used for UI testing, regression testing, and performance testing of the SUT. How do you determine what data to use or undesirable action to take in order to create and execute useful negative test cases? Each positive test case is created by analyzing the business/user requirements, artifacts, and software design documents. Use each positive test case scenario to identify the negative test case by utilizing information not found in the documents.

Automation Testing Cloud

Negative test cases we are checking some specific scenario in negative way. In this article we are concentrating on one of the category called Negative testing. Let’s discuss in below section about what is Negative testing, How To Write down Negative Test Cases, Advantages of Negative Test Cases with examples. The primary objective of testing is make the application under test is defect free and make quality application.


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