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Integration testing is a kind of testing in which individual software modules are combined and tested as a group while System testing is a testing conducted on a complete, integrated system to evaluate the system's compliance with its specified requirements.
Integrataion testing means all the software components are working together correctly or not- to test this we'll do integration testing.
System Testing - Test environment build like production based and we'll do the system testing to verify that the application is working fine as per the business requirments
Usually most of the applications are divided into Modules for easy access for Testing. If two or three Modules are combined and tested,then its known as Integration Testing. Suppose if all the modules are combined & Tested,then its known as System Testing.
1. Integration testing is a testing in which individual software modules are combined and tested as a group while System testing is a testing conducted on a complete, integrated system to evaluate the system’s compliance with its specified requirements.
2. Integration testing is testing the interface between the modules; it can be top down, bottom up, big bang while System testing is testing the end to end business scenarios in the environment which is similar to production environment.
3. System testing will be conducting at final level while Integration testing will be done at each time of module binding or a new module need to bind with the system.
4. System testing is a high level testing while Integration testing is low level testing. In simple words on completion of integration testing, system testing started not vice versa.
5. Test cases Integration testing are created with the express purpose of exercising the interfaces between the components or modules while test cases for System testing are developed to simulated the real life scenarios.
6. For Example if an application has 8 modules. Testing the entire application with all 8 modules combined, we call it System testing and if application interacts with some other applications (External systems) to retrieve or send data, to test with other application and external system or any other module we call it Integration testing or system integration testing.
System Testing to test the components of the systems individually and make sure that they work properly, the integration is to test the different components in the system, maybe thrid party or different components in the same system that affects each other.
System Testing(ST) is performed once the overall system is developed/implemented before deploying for System Integration Testing/Pre-Production Testing/Production( GO TO LIVE) Testing
System Integration Testing(SIT) is performed after system testing to check any integration problems and tested on SIT Systems before deployment onto Pre-Production or Production
System Testing - Testing the completed product to check if the specification has meet. It is black box testing technique so no knowledge of internal structure is required.
Integration Testing - Testing collection and interface modules to check whether they give the expected result.It is both black box testing and white box testing is done so internal structure is required.
Integration testing is done after unit testing, when multiple modules are integrated during the development cycle.
In Waterfall Enviornment, System testing is done only after the completion of full development and integration. System tester need not know the code and design. System testing is to check whether all requirements are met.
In Agile Enviornment, System testing is done along with the Integration testing in every sprint.
System Testing is testing of the software application as a whole to check if the system is complaint with the user requirements.
Integration testing tests the interface between modules of the software application.
Integration Testing is performed during software development life cycle.Integration Testing checks the combined working of different modules in a system together.It can be of two types.Top to Bottom or Bottom to Top Testing. Top to bottom test can performed after the completion of high end modules but bottom to top test can be done during the starting of system development.
System Testing is performed once the overall system is implemented.
Regular Integration Testing will reduce the last minute risk of system failure.
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