System testing with real life example

System testing with real life example

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Updated on Oct 31, 2022 16:57 IST

System testing is a type of software testing performed on a fully integrated system to assess whether the system complies with applicable requirements. In this article System testing is explained with real-life example.It also includes the advantages and disadvantages of system testing.


During system testing, a tester runs various tests on a system to ensure it functions as intended. These tests check the response time of the system, its performance, its functionality, and its security. Each test works to identify any problems with the system before releasing it to the public. Running past tests also saves time and money when creating a product. A good tester will know how to follow directions and use the right equipment when testing a system. They’ll also know how to fix any problems they find during testing.In this article we will cover System testing with real life example

Table of contents

What is System testing?

System testing is a type of software development testing that is used to check the overall functionality of your project. It is performed before any other software development phases. It helps identify bugs and problems in your project’s software before you start developing it. It also helps you verify that your project meets your goals and specifications. The below diagram shows the steps of testing.

  1. Unit testing– Unit tests run against each module or block of code during development. Unit testing is usually done by programmers writing code. 
  2. Integration testingIntegration testing before, during, and after the integration of new modules into the main software package. This includes testing individual code modules. The software can often contain multiple modules written by multiple different programmers. It’s important to test the impact of each module on the overall program model. 
  3. System testing-It is done before the finished software product is released to the market. It checks the overall functionality of a product.It is a kind of black box testing.
  4. Acceptance Testing- It determines whether a system meets acceptance criteria according to user needs, requirements, and business processes, allowing users, customers, or other approved authorities to decide whether to accept the system.
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Real-life example of System testing

  1. Suppose a car-making company has already made systems like the ignition system, braking system, engine, fuel system, accelerator, GPS, air conditioner, etc., which were tested individually(Unit testing). The collaboration of these systems is tested(integration testing) for example the fuel system is checked in collaboration with the car engine. But when all systems are ready, the company will check all the systems working by actually driving the car to check if all the systems are working fine with each other. That will be system testing.
  2. Suppose an e-commerce website has different modules like a registration page, Login page, card, dashboard, payment page, etc. These modules are tested by the developer first, which will be unit testing. The two or more modules will be tested in collaboration with each other. That will be integration testing. But after the completion of all the modules, when the overall website functioning is tested, then that is called system testing.

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Why System testing?

As you know, errors can enter the system at any time. Minor misunderstandings and human errors can generally lead to deviations from requirements. For example, two developers might understand a requirement differently and code according to that understanding. As a result, those modules do not function as expected when put together as a whole system. Therefore, it is essential to test the software system with all components. Therefore, testing the system is the first level of testing, where the whole system comes together and validates against the expected results. Testers should have a good knowledge of product functionality to perform system tests.

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Tools used for System Testing 

  1. JMeter
  2. Selenium
  3. Gallen Framework

Types of System testing

  1. Usability Testing – Primarily focused on the application’s usability, its flexibility in handling controls, and the ability of the system to achieve its goals.
  2. Scalability Testing- Scalability testing is a kind of software program testing done to validate the overall performance of a software program software or machine in phrases of its capacity to boom or lower the number of personal requests.
  3. Hardware/Software Testing –Here, the tester concentrates on the interaction between hardware and software during system testing.
  4. Recovery Testing – Conducted to demonstrate that the software solution is reliable, dependable, and can successfully recover from potential crashes. Migration Testing – Performed to ensure that the software can be easily migrated from the legacy system infrastructure to the current system infrastructure. 
  5. Stress testing – Stress testing is software testing performed to verify the robustness of a system under various loads.
  6. Regression Testing – Includes tests performed to ensure that changes made during the development process have not introduced new bugs. It also prevents old bugs from appearing as new software modules are added over time. 
  7. Functional Testing – Functional testing, also known as functional integrity testing, involves considering possible missing functionality. Testers can create a list of additional features needed to improve the product during functional testing. 
  8. Performance Testing- Performance testing is a type of software testing conducted to test the speed, scalability, stability, and reliability of software products or applications.

Advantages of System testing

  • It includes all software through end-to-end software testing. As a result, you can be sure that the integration of your business requirements and your software architecture is working well. 
  • Detects errors that occur when your application is released to customers. Build your team’s confidence in your product before acceptance testing. 
  • Since this is a form of black box testing, testers do not need to know programming to complete these tests.
  • Various test scripts are used to validate the entire system’s functionality and meet the customer’s technical and business needs.

Disadvantages of System testing

  • The effort involved in this testing process is also greater, as business requirements and software architecture must be considered when conducting tests.
  • It takesmore time than other types of software testing because it covers the entire software framework.


It is an essential part of creating a quality product. It’s used to find any problems with a system before releasing it to the public, especially computer hardware and software systems. A good tester will know how to use the right equipment when testing a system and understands how to fix any problems they find during testing.In this article we have studied about System testing with real life example. .

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