How to Do Integration Testing With Example?

Integration testing is a form of testing in software testing process in order to test that the individual modules or components work together correctly when they are integrated. It looks at problems occurring in the interaction between the different components or modules of the software. Problems with data flow, incorrect interfaces, or logic issues which are going to happen through interaction between components testing normally not be discovered through normal unit testing.

Steps to Do Integration Testing

• Define Scope: Specifying to what components you would like to test and also what the integration points of the scope of what you like to integrate.
• Create Test Scenarios: Create logical test scenarios for every possible user interaction of the modules.
• Prepare Test Data: Prepare input data to test which covers all possible input paths, including invalid inputs.
• Develop Test Cases: Write test cases specifying inputs, expected outputs, and pass/fail criteria.
• Set Up the Environment: Configure a testing environment that mirrors production settings.
• Execute Test Cases: Run the tests systematically, logging any defects or failures for analysis.
• Analyze Results: Work with developers to fix issues and retest until all errors are resolved.

Example of Integration Testing

E-commerce Platform

Consider an e-commerce platform with modules like user authentication, product catalog, shopping cart, payment processing, and order fulfillment:

• Integration Points:
• The product catalog interacts with the shopping cart to add items.
• The shopping cart communicates with payment processing for checkout.
• Test Case Example:
• Input valid login credentials → Expected result: Access granted.
• Add products to the cart → Expected result: Products appear in the cart.
• Process payment → Expected result: Payment is successful and order is placed.

Integration testing ensures that these modules work seamlessly together without errors in data flow or functionality.