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Everything You Should Know About Negative Testing

Negative testing is a type of software testing that looks into unexpected inputs and situations in a software program, like unexpected data or situations ranging from incorrect data types to a sophisticated hacker assault. Negative testing is used to prevent software applications from crashing as a result of negative inputs, as well as to enhance quality and stability.

You can only ensure that our technology works in regular situations by doing positive testing.
To guarantee a fault-free system, we must ensure that your system can manage unforeseen situations.

How Should You Conduct Negative Testing

  • It’s crucial to consider the many circumstances that might negatively impact your application at first.
  • While exploring possibilities, we must prioritize key testing factors to prevent the wastage of time and money.
  • Now we’ll create a test case that incorporates data input testing and the possibility of the program crashing. When a client utilizes the product, we don’t want it to happen.
  • While forming test case priorities, avoid security risks.
  • It’s a good idea to consider the undesired and unanticipated data that may enter our application, which could include minor errors that frustrate users.

Negative Testing Benefits

Negative testing has a number of major advantages, including:

  1. Prior to going live, the client will have more confidence because of negative testing. 
  2. It covers all the bases and increases the chances of success by accounting for all types of errors.
  3. Negative testing assures that a product is of excellent quality and has no or few vulnerabilities.
  4. Conducting a round of negative testing before positive testing to verify that all test scenarios are covered.

Negative Testing Drawbacks

It is useful for improving applications, but it has certain drawbacks which QA teams have to keep in mind:

  • Its implementation necessitates a significant expenditure of time, money, and effort.
  • Customers face significant delays while they wait for the product to release.
  • In certain circumstances, it is unnecessary to do extensive negative testing.
  • It can only be implemented by an educated and professional engineer.

Negative Test Cases

Testing teams create negative test cases in order to test the software system. The team conducts the following tests:

  • Data Bound Test – This is where the testing team checks all of the data fields’ upper and lower boundaries.
  • Field Size Test – It prohibits users from encountering additional characters before receiving an error message indicating that they have exceeded the character limit.
  • Test for Required Data – This check ensures that all data on the screen is validated before crucial data is entered.
  • Numeric Bound Test – This test verifies that negative test cases are correct by examining both the lower and the upper bounds.
  • Implanted Quote – End-users storing information with a single quotation might cause problems for software systems. As a result, the team should offer several bids for each screen.
  • Performance Modification – This test provides test cases that compare past and present release performance statistics to discover potential performance issues.
  • Web Session Testing – This type of testing creates test cases for releasing web pages inside the application without requiring users to log in.

Negative Testing Example 

Consider the scenario of an elevator, which is a well-known example.

We’re all familiar with how an elevator works. There are certain elevator requirements, such as pushing the floor number to direct the elevator to that specific floor, when the elevator reaches the desired floor, the door automatically opens, and so on.

Now let’s look at some elevator scenarios that aren’t so good. Among them are:-

  1. What will happen if the number of people (or their weight) surpasses the limit?
  2. How the system will respond if anyone inside the elevator smokes or starts a fire?
  3. What will happen if the power goes off while the system is running?

Negative testing is necessary in all of these cases. We can’t guarantee that none of the aforementioned events will occur, therefore we need to keep them limited.


Negative testing guarantees that the client receives a bug-free product or application. And to get the best results, you should consider joining hands with a professional software testing company like QASource.

Visit QASource now to implement top-of-line software testing services for your software products.

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