Software testing is a process of executing a program or application with the intent of finding the software bugs.
- It can also be stated as the process of validating and verifying that a software program or application or product:
- Meets the business and technical requirements that guided it’s design and development
- Works as expected
- Can be implemented with the same characteristic.
Let’s break the definition of Software Testing into the following parts:
1) Process: Testing is a process rather than a single activity.
2) All Life Cycle Activities: Testing is a process that’s take place throughout the Software Development Life Cycle (SDLC).
- The process of designing tests early in the life cycle can help to prevent defects from being introduced in the code. Sometimes it’s referred as “verifying the test basis via the test design”.
- The test basis includes documents such as the requirements and design specifications.
3) Static Testing: It can test and find defects without executing code. Static Testing is done during verification process. This testing includes reviewing of the documents (including source code) and static analysis. This is useful and cost effective way of testing. For example: reviewing, walkthrough, inspection, etc.
4) Dynamic Testing: In dynamic testing the software code is executed to demonstrate the result of running tests. It’s done during validation process. For example: unit testing, integration testing, system testing, etc.
5) Planning: We need to plan as what we want to do. We control the test activities, we report on testing progress and the status of the software under test.
6) Preparation: We need to choose what testing we will do, by selecting test conditions and designing test cases.
7) Evaluation: During evaluation we must check the results and evaluate the software under test and the completion criteria, which helps us to decide whether we have finished testing and whether the software product has passed the tests.
8) Software products and related work products: Along with the testing of code the testing of requirement and design specifications and also the related documents like operation, user and training material is equally important.
Why is Testing Necessary ?
Software Testing is necessary because we all make mistakes. Some of those mistakes are unimportant, but some of them are expensive or dangerous. We need to check everything and anything we produce because things can always go wrong – humans make mistakes all the time.
Since we assume that our work may have mistakes, hence we all need to check our own work. However some mistakes come from bad assumptions and blind spots, so we might make the same mistakes when we check our own work as we made when we did it. So we may not notice the flaws in what we have done.
Ideally, we should get someone else to check our work because another person is more likely to spot the flaws.
There are several reasons which clearly tells us as why Software Testing is important and what are the major things that we should consider while testing of any product or application.
Software testing is very important because of the following reasons:
- Software testing is really required to point out the defects and errors that were made during the development phases.
- It’s essential since it makes sure of the Customer’s reliability and their satisfaction in the application.
- It is very important to ensure the Quality of the product. Quality product delivered to the customers helps in gaining their confidence. (Know more about Software Quality)
- Testing is necessary in order to provide the facilities to the customers like the delivery of high quality product or software application which requires lower maintenance cost and hence results into more accurate, consistent and reliable results.
- Testing is required for an effective performance of software application or product.
- It’s important to ensure that the application should not result into any failures because it can be very expensive in the future or in the later stages of the development.
- It’s required to stay in the business.