System Testing

Tram Ho

SYSTEM TESTING is a complete and fully integrated software product verification level. The purpose of the system test is to evaluate the end-to-end system specifications. Usually, software is just one element of a larger computer-based system. Finally, the software is interface with other software / hardware systems. System Testing is actually a series of different tests with the sole purpose of implementing a whole computer based system. In this tutorial we will learn

  • Check the system is Black Box
  • What do you verify in System test?
  • Software testing hierarchy
  • Different types of system checks
  • What types of system testers should testers use?

System Testing is Blackbox

Two categories of software testing

Black box test White box test System test is under black box testing list of software testing.

White box testing is to test the internal operation or code of a software application. Black box or System Testing is the opposite. System inspection in relation to the external workings of the software from the user’s point of view.

What do you verify in System Testing?

Checking the system involves checking the software code for tracking

  • Check out fully integrated applications including external peripherals to check how components interact with each other and with the entire system. This is also called the End to End test scenario.
  • Verify thoroughly tests every input in the application to test the desired output.
  • Test user experience with the app. That is a very basic description of what is involved in system testing. You need to build detailed test cases and test suites that test every aspect of the application from the outside without looking at the actual source code.

Software Testing Hierarchy

As with almost every software engineering process, software testing has a specified order to do things. The following is a list of software testing items ordered chronologically. Here are the steps to be taken to completely test the new software in preparation for marketing it:

  • Unit testing is performed on each module or code block during development. Unit testing is usually done by the coder.
  • Integration testing is performed before, during, and after integrating a new module into the main software package. This involves testing each code module individually. A piece of software may contain a number of modules that are typically created by a number of different programmers. It is important to test the effects of each module on the entire program model.
  • System testing is performed by a professional testing agent on the finished software product before it is released to the market.
  • Acceptance test – beta test of product performed by actual end user.

Different Types of System Testing

There are more than 50 types of System Testing. For a complete list of software testing types, click here. Below, we have listed the types of system testing commonly used by a large software development company

  1. Usability testing – mainly focused on user ease of use of the application, flexibility in handling controls, and the system’s ability to meet its goals.
  2. Load test – is required to know that a software solution will work under real life loads.
  3. Regression testing – involves testing done to ensure no changes made during development cause new bugs. It also ensures no stale bugs emerge from the addition of new software modules over time.
  4. Recovery test – performed to demonstrate a software solution that is reliable, reliable, and able to successfully recover from possible problems.
  5. Migration testing – is done to ensure that software can be migrated from older system infrastructure to current system infrastructure without any problems.
  6. Functional Testing – Also known as function completeness testing, Functional Testing involves trying to think of any functionality that might be missing. The tester can list additional functions that a product may have to improve on during functional testing.
  7. Hardware / Software Testing – IBM calls Hardware / Software testing “HW / SW Test”. This is when the tester focuses his or her attention on the interactions between the hardware and software during the system test.

What Types of System Testing Should Testers Use?

  • There are over 50 different types of system testing. The specific types used by the tester depend on a number of variables. Those variables include:
  • Who the tester works for – This is a major factor in determining the types of system testing the tester will use. The methods used by large companies are different from the methods used by small and medium companies.
  • Time available for testing – Ultimately, all 50 test types can be used. Time is often the one that limits us from using only the types that are best suited for a software project.
  • Resources available to tester – Of course some testers will not have the resources needed to conduct a test type. For example, if you are a tester working for a large software development company, you might have expensive automated testing software not available to others.
  • Software Tester Education- There is a certain learning path available for each type of software testing. In order to use some related software, testers have to learn how to use it.
  • Test Budget – Money becomes a factor not only for smaller companies and individual software developers but also for large companies.
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Source : Viblo