A necessary part of writing code is testing the applications you create. It may be difficult to locate the correct instruments to conduct various testing functions. For email functions, one test may be needed, while another may be required for Android. It is possible to use many languages, which need more intricate and specialized research.
The purpose of integration testing is to ensure that, after the completion and integration of two or more modules, individual modules are functioning as planned. For Integration Testing, many companies either use mixed unit tests or end-to-end functional workflow tests.
Performing regular integration testing is always good so that it guarantees that the respective modules are functioning as per requirement. Different integration testing tools are available in the current market, allowing the company to develop a structure for developing integration testing suites.
What is Integration Testing with example?
INTEGRATION TESTING is characterized as a method of software testing to check whether software modules are logically incorporated and functioning. Multiple software modules, programmed by various programmers, consist of a typical software project. The goal of this type of testing is to find weaknesses in the communication between these software modules when they are implemented.
Although each software module is unit-tested, there are still defects for different reasons, such as:
- In general, a module is developed by an individual software developer whose logic can vary from other programmers in terms of understanding and programming. Integration testing is important to verify that the software modules work uniformly.
- There are large chances of changing customer requirements at the time of module creation. These new specifications cannot be checked by the unit, so system integration testing is required.
- Interfaces between software modules and databases may be wrong.
- External hardware interfaces can be inaccurate if any.
- Inadequate handling of exceptions might cause problems.
Types of Integration Testing
The interactions and interfaces between integrated units/components concentrate on this form of integration testing. After unit testing, unit integration testing is carried out and is usually automated. Unit integration tests are typically part of the continuous integration process for iterative and gradual growth.
The interactions and interfaces between systems are the subjects of this type of integration test (A system is a group of interacting or interrelated entities that form a unified whole). The other device in which it must be incorporated may be either internal or external (by a third party or outsourced entity). Usually, these systems are exposed through an Application Programming Interface (API) or a Microservice.
Integration test approaches
Integration Research essentially has four approaches:
- Big bang integration test technique
This is an integration research methodology where all or most of the units are integrated and evaluated at the same time. When the testing team receives the whole program in a bundle, this approach is undertaken. And what is the difference between Device Testing and Big Bang Integration Testing? Well, the former only measures the interactions between the units, while the latter tests the whole system’s functionality.
- Top-Down integration test technique
This is an integration testing methodology where top-level units are first evaluated and lower-level units are step-by-step tested after that. This approach is taken when the approach to top-down growth is adopted. To replicate lower-level units that may not be accessible during the initial phases, test stubs are required.
- Bottom-Up integration test technique
This is an integration testing approach where bottom-level units are evaluated step by step first and upper-level units after that. This approach is taken when the approach of bottom-up growth is practiced. To simulate higher-level units that may not be available during the initial phases, test drivers are required.
Here’s the list of top integration testing tools:
Vector Software is the common VectorCAST method for both unit and integration testing results. Here, to ensure the function of that individual component as planned without any dependence, each unit or module is independently evaluated. These components are then mixed during Integration Testing and checked that all integrated modules function properly as a complete combination.
Citrus is a Java-written test system that helps to test message-based applications and data formats for automated integration. Citrus reinforces request and response data for JSON, XML, and plain text messaging.
For more than 40 years, LDRA has been the industry leader in software quality tools. For sensitive applications, these tools are used to automate code analysis. LDRA provides integration testing tools that are used for checking compliance requirements for various organizations.
LDRA is an open framework and it is possible to develop integration tests using the LDRA tool suite and it also offers static analysis and dynamic analysis across multiple platforms.
It is fully integrated, making it an exceptional tool for communicating with business stakeholders. FitNesse is an open-source project and neither the firm nor any person owns the code base. The FitNesse group shares a lot of data because it’s an open-source tool.
How is Integration Testing done?
The protocol for the integration test, regardless of the software testing techniques (discussed above):
- Prepare the Schedule for Integration Tests
- Plan Scenarios, Situations, and Scripts for the exam.
- Performing the test Cases followed by the defects being identified.
- Tracking the defects & re-testing them.
- Steps 3 and 4 are replicated before integration is completed successfully.
The verification process of the contact between two software units or a module is integration testing java. It focuses on determining the interface’s accuracy. The goal of the integration test is to reveal flaws in the relationship between integrated units. Integration testing is conducted after all the modules have been unit tested.