Negative Testing Guide Explained with Real-Time Examples

So it’s the responsibility of the Quality Analyst, to think out of the box in terms of breaking the application. Point here is to try every input which is invalid and then check the behavior of the app against it. If application crashes or shuts down without any warning or message then it needs to fix and give a proper message or warning, so that user would know what not to do while using the application. In this article, you’ll find an overview of negative testing, including how to create negative test cases with expert examples and downloadable test case templates.

negative testing examples

Price-Jones recommends starting with the positive test case criteria, which you define by test scenarios from a business requirement. Negative testing involves uncovering any potential bugs, errors, or security vulnerabilities that might exist. This lowers the cost of bugs and helps develop software applications within the budget. By deliberately testing for unexpected scenarios, it helps ensure that the software is robust and reliable.

Levels of Testing in Software Testing

If the window does not appear, this means that an unexpected exception occurred, and you need to find its cause (see below). Negative testing helps identify defects and vulnerabilities that may not be apparent during positive testing. It ensures that the software can handle unexpected scenarios gracefully, preventing crashes and enhancing the overall user experience. 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. The negative testing is always talk about the process of applying creativity as much as possible and validates the inputs with the invalid inputs.

Think about the situation of an elevator, which is a well-known example of negative testing. At one point, you should feel confident that any further tests are unlikely to give you more confidence in the code, and that’s when you should stop. It is not the job of the unit tests for this class to make sure the SUT is validating against the “right” numbers.

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Negative testing, especially, can help identify security vulnerabilities by testing the system’s response to invalid inputs, malicious attacks, and abnormal scenarios. It helps ensure that the software can handle such situations securely and protect against potential security risks. Negative testing is primarily a manual activity and is historically managed using spreadsheets. With test automation software, you can work with tools that let you create negative test cases using valid and invalid data to improve test coverage of the AUT with positive and negative testing scenarios. Negative Testing is a software testing type used to check the software application for unexpected input data and conditions. Unexpected data or conditions can be anything from wrong data type to strong hacking attack.

Hence, negative tests ensure software systems’ stability and reliability, resulting in higher quality and more robust software applications. To develop a high-quality software application, the QA analyst focuses on different aspects, like its functionality and working. This requires the implementation of effective testing techniques.

Best Practices: Negative Testing

Always consider the field types for testing negative scenarios. For example, if the input field is accepting only numerics then try to pass the string values. Positive testing is important as it validates the expected behaviors and functionalities of the software under normal conditions. It helps ensure that the system functions correctly and meets the requirements specified by the end-users. The main reason behind Negative testing is to check the stability of the software application against the influences of different variety of incorrect validation data set.

  • Download and fill out this form to document the test name and ID, the test duration, each step and component, and any notes about the test, including the automated test scripts.
  • You test the software by inserting invalid data and compare the expected output against the incorrect input, to ensure that your application won’t crash.
  • Thus, negative testing, in this particular instance, plays a pivotal role in validating the functionality of the login system, even in the face of invalid inputs, such as passwords that fall outside the acceptable length range.
  • For example, if you perform a negative web application test, the test environment involves having a database, operating system, browsers, and a particular version of web servers.
  • Most infections, according to CDC data, present in July and August.

These were few expected outcomes and reaction of the application to this test scenario will depend on the requirements. Different music applications will have different expected results for the same test case. Stress testing, Load testing and Stability testing are parts of negative testing. Testers can manually write automated test scripts (i.e., software code) to help with test case steps that require a large amount of input data, or they can use test management tools to set up reusable automated scripts. Software solutions like TestComplete and Selenium feature automated test script management, version control, and reporting capabilities across different requirements.

Buy self-tests (at-home tests)

Which is what we often do when we try to test something in a positive way. In this article we explore the subject of testing to “break” a software and required techniques. When any tester start thinking of testing then every tester first thinking around the positive test cases. It is absolutely necessary to know why Negative testing is essential.

By proving what the software should not do or accept, the tester checks that the code meets each requirement. Note that the response to a thrown exception depends on the tested application. One effective approach to testing software applications involves subjecting them to inputs located at the extreme limits of the input values. By evaluating these exceptional values, potential underlying issues within the application can be easily uncovered, particularly at the boundaries of acceptable inputs.

Nine Ways to Design and Perform Negative Tests

Making sure these numbers are picked and encoded correctly is a QA task which refers to pure data, not to code. And “data” which does not follow a specific, algorithmic creation logic, cannot be unit tested sensibly, it needs to be proofread. In this case, we will search for one product (maybe of a single keyword, to finish up my testing) and check if it displays the results or not.

negative testing examples

To track error messages from a keyword test, use the If Object operation. For example, using this operation, you can create a test that will check whether the specified window exists. Insert the operation negative testing examples right after the operation with invalid data input and specify an error message window as the needed object. If the application handles input data correctly, the error message window appears.

Exception Testing

In this situation, we must prioritize the instances before executing them in order to save time and money on testing. In The Art of Software Testing, Myers describes a software application for drawing a triangle. If all three values are equal, an equilateral triangle is drawn. If all three are different, a scalene triangle is drawn, and if two values are equal and the third is different, then an isosceles triangle is drawn. Still others worry that they’ll get so involved with negative testing that positive testing of the application’s basic functionality won’t get completed.


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