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Why testing is needed?

Here, we are going to learn about the testing and its need, types of testing, etc.
Submitted by Rahul Gupta, on March 07, 2021

Testing and its need

Testing can be considered as a tool for verifying whether the software application is performing in a good way or not. The testing is helpful to verify the objectives of the software application. The tester detects the faults in the software by doing mapping between actual results of test case execution with the expected result. Manual and automated approaches may be used to do this.

The problems related to all failed cases are communicated for debugging and correcting to the developer's team. After fixing the bug, the tester re-tests the bug and checks whether there is no problem anymore. If all the objectives are fulfilled, testing is successful.

Types of testing

The common categories of software testing are as follows -

• Positive Testing: The key objective of positive testing is to ensure that the product produced is operating or acting as it is supposed to do.
• Negative Testing: It ensures that the product is reliable and non-failing, even if unexpected inputs are introduced into the product.

Need of testing

Software testing is needed in various cases. Followings are the most common cases -

• Technical Case: It is difficult to predict from its components the consequences of the requirement and the system's behavior. Application failures can result from bugs found in languages, user interfaces, operating systems, and databases.
• Business Case: If the detection of bugs is not achieved in the development phase, it can cause a big problem at the customer's end. Reputation, operations, and revenues are reduced by applications with bugs.
• Professional Case: Designing a test case is a hard and challenging task.
• For Verification and Validation: The key methods and metrics for verification and validation are checking.
• For Reliability Estimation: To obtain the rate of failure, software reliability estimation can be performed by testing where the testing functions as a statistical sampling tool.