System Testing vs End to End Testing (2023)

When it comes to developing software, many testing methods are used to make sure the software meets the highest quality standards. Each testing method is designed to be used at different steps of the process and cover different testing areas, such as performance, usability, compatibility, and scalability, to name a few.

Two of the most common testing methods are System Testing vs End to End Testing. These terms are often used interchangeably to describe the same thing, but they are in fact quite different. Therefore, it is vital that developers and clients understand what sets these two testing methods apart, and how they are both used to ensure a software application meets the highest standards.

What is System Testing?

System Testing is a testing method that involves validating a fully integrated software product. It is usually performed after Unit Testing and Integration Testing has been completed. Unit Testing is where the individual units of the software are tested before being integrated into the software. Integration Testing involves testing the individual units of the software after being integrated into the software.

Based on this progression, System Testing can be considered the next logical step in the testing process. Here, a team performs a complete evaluation of the software, and determines how the various components of the software interact with each other. In essence, it confirms that the software does what it is intended to do, and that it is in line with the client’s unique requirements.

(Video) Difference between System testing and End to End testing

Advantages of System Testing

Confirms that the software meets the client’s unique requirements

System Testing is usually carried out near the end of the software development cycle. This makes it the perfect chance to confirm that all of the work done, up until this point, aligns with the client’s initial scope. It also confirms that the software is viable from a technical, business, and functional standpoint.

Identifies bugs, errors, vulnerabilities, and areas of improvement

Any bugs, errors, or faults that were not found in Unit Testing or Integration Testing, will surely show up in System Testing. It is one of the last steps in the quality assurance process, before the launch of the software. Therefore, it is vital that System Testing is part of the testing phase, as it is a useful way to analyze the software from the perspective of the user.

Simulates the real-world scenario

System Testing is all about discovering what the software is like to use in a real-world scenario. That’s why System Testing is performed, as close as possible, to a real-world production or business environment. It gives the developer and the client a clear, thorough overview on the current state of the software, in the most optimal operating environment.

For this reason, every aspect of the software is tested. This includes Performance, Behavior, and Scalability, to name a few. It ensures that no stone is left untouched, and that the final software provides the best possible user experience.

What is End to End Testing?

End to End Testing is a testing method that involves assessing the workflow of a (near) final software, from start to finish. The point of End to End Testing is to determine how the software behaves and make sure that the flow of data is maintained for different tasks and processes. It is an excellent way to detect discrepancies in the software and see how the software behaves when a real user interacts with it.

During End to End Testing, the user will typically interact with the software in many ways. They may create a profile, navigate the app, load different pages, and even perform more complex tasks like making online payments. The idea behind this is to confirm that the software does everything the user asks of it, and that each action produces an outcome that matches both the developer and clients’ expectations.

(Video) What is System Testing in Software Testing? SoftwaretestingbyMKT

Advantages of End to End Testing

Helps optimize the user experience

End to End Testing is a great way to gather valuable feedback from real people. It can help you identify problems in the software that you previously did not consider. For example, a user may report that the location of the ‘Menu’ button is in an inconvenient place, and that it would be better suited elsewhere. Prior to this, you may have assumed that its location was fine; but with this new insight, you can change where it is placed, making it easier to find and navigate the rest of the app.

Reduces the cost of building and maintaining the software

End to End testing makes it easier for testers and developers to catch problems before they escalate into serious issues. This is because most End to End Testing is carried out manually, by real testers, as opposed to automated scripts.

As a result, testers can write End to End Tests that are based on the user’s behavior, which means they are more likely to pick up on problems that an automated script may have overlooked. This can greatly help reduce the cost of building and maintaining the software, as well as improve the quality of the initial launch version.

(Video) Difference between system testing and End to End Testing.

Replicates the real-world user experience

End to End Testing is the closest a developer can get to seeing the software in action in a real-world environment. This allows the development team to assess aspects of the software that previous tests could not. The most important of those is the user experience.

But other external factors can be tested as well, such as how well the software integrates with other hardware and software – connected components that were not present in previous tests.

Is One Testing Method Better Than the Other?

In reality, neither System Testing vs End to End Testing is better than the other. They are both designed to test different aspects of the software, reveal different findings, and achieve different outcomes.

The argument as to whether one testing method is better than the other comes from the false assumption that both testing methods are the same; when, in actual fact, they are different methods with different testing coverages.

To prioritize one testing method over the other is a mistake. Such a decision could cause the development team to overlook crucial aspects of the software and release a lower quality product as a result.

(Video) What is end to end testing, difference between system & end to end testing, examples and frameworks

Of course, the successful integration of the right testing methods comes down to the software development team, not the client. So, it is in your best interests to carefully review the testing methods that a software developer uses, and understand how each method contributes to the quality of the final software.

Key Takeaways From Software Testing

System Testing vs End to End Testing (1)

System Testing vs End to End Testing both have their place in software development. If you are a client looking to build new software, or update your existing software, then understanding the type of testing methods that a software development company uses is vital to receiving a quality product.

For this reason, it’s important that you ask the right questions. Find out what kind of testing methods they use. Ask what kind of tools and software they use. And find out what the team were to do when faced with a challenging roadblock.

Ideally, the software developers you choose will have methods in place to deal with unforeseen challenges and will have continuous feedback as part of their processes in order to identify bugs and issues early and ensure the final product meets the highest quality standards.

(Video) System Testing with examples | Software Engineering

By doing so, you will greatly improve the odds of making your life easier during the software development process and receiving a higher quality product at the end.

Topics: Software Testing


System Testing vs End to End Testing? ›

In system testing, the entire software or application is tested at a time. In end-to-end testing, the behavioral flow of the application is tested.

Is system testing same as end to end testing? ›

In system testing, the entire software or application is tested at a time. In end-to-end testing, the behavioral flow of the application is tested.

What are the main differences between unit and end to end testing answer? ›

The Difference between Unit Testing and End-to-End Testing is that Unit testing ensures that the functions or calculations that generate data, a numerical value, a text string, are working as required. End-to-end testing ensures that buttons, forms, updates, links, and the complete workflows work properly.

How much testing is sufficient or when to stop testing? ›

Test Coverage should be 95% achieved.

What is the difference between system and end to end? ›

System testing is done to determine whether a product complies with functional requirements. End-to-end testing searches for deviations from expected outcomes in both input and output. The tester tests the whole system, that is, all of a product's components. The tester tests the software's behavioral flow.

What is another name for end to end testing? ›

End-to-end testing, also known as E2E testing, is a way to make sure that applications behave as expected and that the flow of data is maintained for all kinds of user tasks and processes. This type of testing approach starts from the end user's perspective and simulates a real-world scenario.

Is end to end testing part of UAT? ›

End-to-End testing is similar to user acceptance testing (UAT) because testers will replicate end-user behavior, like making a transaction through the website. However, UAT is typically executed by business users, while end-to-end testing is performed by a technical testing team or quality assurance (QA.)

How do you explain end to end testing? ›

End-to-end testing verifies that all components of a system can run under real-world scenarios. The goal of this form of testing is to simulate a user experience from start to finish. E2E testing can find software dependencies while also validating the system under test, its data integrity and integrations.

Why use end to end testing? ›

End-to-end (E2E) testing ensures that applications meet expectations by behaving as they were designed to. This also checks if the data flow across processes is consistent. The ultimate goal of this type of testing is simulating a real-world situation from the perspective of the end user.

Is end to end testing black box testing? ›

End to end testing is a type of black box testing in which we test application from a complete scenario point of view. A scenario can consists of many functionalities. Each of these functionality can have their own functional tests.

How do you decide the testing is enough? ›

Enough testing should be determined by consensus, with the tester facilitating and contributing information to the consensus process.

How can you determine how much testing is enough? ›

Data Driven Techniques to Measure How Much Testing is Enough
  1. Ask the Right Question.
  2. Define Your Project and Testing Requirements.
  3. Do Not Trap Yourself In 'Is it Enough' Question.
  4. Understand the Testing Scope.
  5. Make the Right Decision.
Apr 6, 2023

How many test cases are enough? ›

Formal test cases

In order to fully test that all the requirements of an application are met, there must be at least two test cases for each requirement: one positive test and one negative test.

What is an example of end to end testing? ›

An end-to-end testing example is running a web application on many browsers. Specifications for the browser test cases can vary for different scenarios. This can lead to spending beyond budget. Also, end-to-end testing may not produce quick responses when needed.

What is an example of a system test? ›

Example of System Testing

Each component of the automobile, such as the seats, steering, mirror, brake, cable, engine, car structure, and wheels, is made independently. After each item is manufactured, it is tested separately to see whether it functions as intended. This is known as unit testing.

What are the types of system testing? ›

What are the different types of system testing?
  • Recovery testing. A recovery test is a system test that forces the software to fail in various ways, therefore verifying that the recovery is performed properly. ...
  • Security testing. ...
  • Performance testing. ...
  • Regression testing. ...
  • Alpha testing. ...
  • Beta testing.

What is the opposite of end-to-end testing? ›

End-to-End Testing vs. Integration Testing
Integration TestingEnd-to-End Testing
Testing to make sure app components work well together.Testing the product as a user would experience it.
5 more rows
Mar 3, 2021

What is end-to-end testing in agile? ›

End-to-end testing is a type of software testing that tests flows from beginning to end, as opposed to only testing individual steps. By performing end-to-end tests, it's possible to test an application in its entirety, as well as its connection with other applications, as it is experienced by the user.

What is an example of end-to-end? ›

Examples of End-to-End Services

In the world of procurement, an end-to-end process could mean analyzing each and every point in a company's supply chain, from sourcing and ordering raw materials to the distribution of goods to end consumers.

Is UAT part of system testing? ›

System Integration Testing or SIT is done by testers whereas User Acceptance Testing, commonly known as UAT is done lastly by the end-users. This article will compare both SIT and UAT in detail and help you understand the key differences between the two.

What is the difference between system testing and UAT? ›

User Acceptance Testing (UAT) and System Integration Testing (SIT) are two great examples to dive in deeper and review. UAT represents testing whether an application meets the business need whereas SIT represents the testing of an application to ensure it meets its engineering specifications.

Who is responsible for e2e testing? ›

It's purely up to the developer to test their code to ensure it works correctly. Similarly, if a large company hires a developer, they would expect the developer's code to work at least 95% of the time.

How do I prepare for end-to-end testing? ›

Key Steps in Setting up End-to-End Tests:

Review the requirements you'll be using end-to-end testing to validate. Set up the test environments and outline the hardware /software requirements. Define all the processes of your systems and its integrated subsystems.

Is selenium end-to-end testing? ›

Selenium is a powerful and widely used open-source automation testing tool that has become the standard for end-to-end testing of web applications.

What is meant by sanity testing? ›

Sanity Testing or Surface Level testing is a type of testing which is performed on the stable build of the software. It is a quick and basic test (or set of tests) to ensure that the code changes made are working properly without any bugs.

What are the disadvantages of end to end tests? ›

The cons of end-to-end testing
  • Slow execution: Testing that verifies workflows through the UI can take a long time to run.
  • Fragile/flaky tests: E2E tests may require significant maintenance and troubleshooting.
Sep 10, 2021

What do you mean by system testing explain in detail? ›

Definition: System testing is defined as testing of a complete and fully integrated software product. This testing falls in black-box testing wherein knowledge of the inner design of the code is not a pre-requisite and is done by the testing team.

Is system testing black box? ›

Black box testing involves testing a system with no prior knowledge of its internal workings. A tester provides an input, and observes the output generated by the system under test.

What is the key to successful testing? ›

Setting and maintaining a schedule for testing is crucial to the success of your project. Completing a comprehensive timeline for testing that has the appropriate amount of leeway for each task is at the crux of an effective testing strategy – and any project management efforts in general.

Which testing is performed first? ›

Unit Testing is the first level of testing usually performed by the developers.

Can testing be 100 %? If not then why? ›

100% test coverage simply means you've written a sufficient amount of tests to cover every line of code in your application. That's it, nothing more, nothing less. If you've structured your tests correctly, this would theoretically mean you can predict what some input would do to get some output.

What is the difference between system testing and functional testing? ›

Functional testing aims to figure out whether given functionality works as specified. System testing aims to figure out whether the whole system fulfills the requirements given to it. So in functional testing you test that given part of the whole system functions in a specified way.


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