Integration Testing vs Functional Testing: How They Differ

Non-functional testing is just as necessary as tests that validate functionality. Many teams consider non-functional testing a lower priority because the improvements it provides are less dramatic. A user may be annoyed if performance degrades, but they may still be able to use the software application. Non-functional testing assesses application properties that aren’t critical to functionality but contribute to the end-user experience. Performance and reliability under load aren’t functional components of a software system but can certainly make or break the user experience.

Functional testing primarily focuses on whether the system delivered the output desired. Non-functional testing validates the “hows” of the AUT’s features, performance, security, scalability, etc. For example, upon entering the correct details, the user should be redirected to the homepage of the organization. Integration testing tests the interface between the different modules, and functional testing tests the working of the application as a whole. Integration testing is a kind of procedure that falls under functional testing. It’s defined as a type of testing technique where the software modules are integrated logically and tested as a group.

Smoke Testing

One way to automate your functional tests is by using automated visual testing. Automated visual testing uses Visual AI to view software in the same way a human would, and can automatically highlight any unexpected differences with a high degree of accuracy. Regression testing makes sure that the addition of new code does not break existing functionalities. In other words, did your new code cause the quality of your application to “regress” or go backwards? Regression tests target the changes that were made and ensure the whole application continues to remain stable and function as expected. Unit testing breaks down the desired outcome into individual units, allowing you to test whether a small number of inputs produce the desired output.

what is functional testing

Sanity testing is usually performed after smoke testing, i.e. after receiving a software build with minor changes made. In simpler words, it is used to validate the code changes introduced continue to work as expected. Functional testing covers a wide range of different testing types, and functional tests can cover both broad and narrow scopes of the system under test. Functional testing only tests what an application does and what it is supposed to do, but not how it interacts with its users. To get an understanding of what functional test is or is not, it may be best to show a few examples of non-functional testing. Is a broad type of testing designed to determine whether an application performs a specified set of business functions.

Smoke testing

Functional testing suites are the more strictly necessary of the two categories. The implementation details and performance metrics that non-functional testing targets are often secondary matters of refinement. A robust testing methodology also accounts for these factors, especially if scaling is a priority. Functional testing compares actual outputs against expected behaviors. This provides a clearer overall picture than testing individual modules in isolation. Interactions between modules are frequently the points where errors occur.

  • Some application functions are high-priority and must, therefore, take testing precedence over lower priority features.
  • It supports tests executed at the web browser and uses a ruby scripting language.
  • However, you can easily overcome this issue by switching to test automation.
  • These communications need to be included in integration testing and ensured that they operate properly.

Instead, you’ll test how each page interlinks with the others, such as checking the linking between the inbox page and the delete mail page. Similarly, the integration between the login page and the inbox module needs to be verified. Then, you need to break the application into different modules and take an overview of each module’s functionality. Functional testing techniques test the use-case scenario where the system works to see if all the components are working perfectly in combination.

Types of Non-Functional Testing, Discussion, & Examples

In the user acceptance phase of software testing, developers provide part or all of the application to end users or their representatives to model real-world interactions and functionality. Many healthy engineering functional testing cultures avoid relying heavily on user acceptance testing due to its unreliability, cost, and time consumption. Still, some user acceptance testing is a vital part of testing procedures for most applications.

It acts as a foundation of the structure, and it is a crucial part of every test routine. CucumberCucumber is an open-source testing tool written in Ruby language. It is used to test many other languages like java, c#, and python. The main objective of functional testing is to test the functionality of the component. Software testing is a technique to check whether the actual result matches the expected result and to ensure that the software has not any defect or bug.

What Is Integration Functional Testing?

Functional testing is a sort of software testing that focuses on the program’s functional needs. Functional testing is a form of software testing where you check if your application does what it’s supposed to. Don’t fall into the trap of automating everything, especially when talking about UI test automation. Automate stable features that will need regression testing in the long run. To learn more about testing and how you can further incorporate good testing practices with your continuous integration tools, explore some of the testing tools that integrate with CircleCI.

When successful, the login page directs the user to the HRMS home page. An online HRMS portal on which the user logs in with their user account and password. Functional testing is standardly performed under this order of action.

Resources to Help You Stay on Top of Testing Trends and Techniques

The main purpose of this form of software testing is to test each functionality of the application by providing certain inputs and validating the outputs against the functional requirements. Choosing an enterprise-level functional testing tool provides hyper-automation, maximizing which processes you can automate. You can either have a functional testing plan that involves testing these conditions manually or create an automatic script for automated functional testing that simulates the scenarios. Functional and non-functional testing tests different software aspects. Functional testing in software testing is concerned with whether each function of the software or app conforms to its required specifications. Non-functional testing, on the other hand, measures how well software or apps perform rather than if they function at all.

what is functional testing

Due to its work-intensive nature, regression testing is often automated. Functional testing mainly involves black box testing and it is not concerned about the source code of the application. This testing checks User Interface, APIs, Database, Security, Client/Server communication and other functionality of the Application Under Test. Integration functional testing makes sure that the website/application is defect-free, but it checks the functionality module-wise. It ensures the expected behavior of all the functionalities and also if the architecture is correct with the required security. It’s the second level of functional testing that tests a given software.

Sanity Testing

Within this phase, the desired or acceptable output, as specified by the requirements, is also established. Component testing is similar to unit testing because they both isolate a single functionality and validate that individually. However, testing for components at this phase might call for stimulative interactions with sample test data, aka stub and driver.