To start with SIT - System Integration Testing "We" as software Testers should be performing at-least one round of Integration Testing before giving sign-off to any Product/Major Release.
System Integration Testing plays a major role in modern era as customers expect us to Test the software in whole, as in they are not satisfied with just the UI validations or testing the document requirements which is developed on the page.
Software Applications now a days are developed with lots and lots of dependencies. To perform or complete any action by the software it requires many or third party involvement. Lets make it simple take an eCommerce website(say Amazon), For Amazon to display a set of products on their site there are n number of Services which are playing a major role in the background.
Lets make it even more simpler with an Example.
Test Scenario: Check if the user is able to view the price for a product.
Normal Functional Test:
In this we just validate and see if the user is able to view the Product price for the products, as Manual Testers we navigate to various Categories/Departments/Pages/Product Details Page and check if just the "Price" for the product is getting displayed.
Integration Test:
In Integration Testing or System Integration Testing we test the product price in different scenarios, We try to understand where does the Price comes from for each product, how does it differ for products, Is it varying for Categories, What if I update a price for a product etc., We can derive n number of scenarios if I need to do an Integration Testing.
This gives us a clear picture on the Expectation from the Testers, A Tester should be a Pirate and should test the product in full end to end Swing!!
Definition:
System Integration Testing plays a major role in modern era as customers expect us to Test the software in whole, as in they are not satisfied with just the UI validations or testing the document requirements which is developed on the page.
Software Applications now a days are developed with lots and lots of dependencies. To perform or complete any action by the software it requires many or third party involvement. Lets make it simple take an eCommerce website(say Amazon), For Amazon to display a set of products on their site there are n number of Services which are playing a major role in the background.
Lets make it even more simpler with an Example.
Test Scenario: Check if the user is able to view the price for a product.
Normal Functional Test:
In this we just validate and see if the user is able to view the Product price for the products, as Manual Testers we navigate to various Categories/Departments/Pages/Product Details Page and check if just the "Price" for the product is getting displayed.
Integration Test:
In Integration Testing or System Integration Testing we test the product price in different scenarios, We try to understand where does the Price comes from for each product, how does it differ for products, Is it varying for Categories, What if I update a price for a product etc., We can derive n number of scenarios if I need to do an Integration Testing.
This gives us a clear picture on the Expectation from the Testers, A Tester should be a Pirate and should test the product in full end to end Swing!!
Definition:
"System integration testing involves the overall testing of a complete system of many subsystem components or elements"

The blog which you are shared is helpful for us to know about the software testing and its uses. Thanks for your information.
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