How to do a good test? (4) Integration Testing (IT)

1. Detailed introduction to integration testing:

Integration Testing (IT) is a software testing method designed to verify whether the interaction and integration between different components, modules or subsystems work properly. It focuses on testing the interfaces and data transfer between components of a system to ensure they work together correctly and to detect potential integration issues.

2. Usage scenarios:

Integration testing is suitable for the following situations:

• For the web and mobile terminals of the online shopping system, integration testing can be used to verify the collaboration and data transfer between different modules (such as shopping cart, payment, order management, etc.).
• Integration testing can catch errors caused by integration problems between components, such as interface mismatches, data transfer errors, etc.
• It helps ensure that different parts of the system integrate properly to provide a stable and seamless user experience.

3. Common technologies and tools:

When conducting integration testing of online shopping systems, you can use the following common technologies and tools:

• Unit testing framework: such as JUnit, TestNG, etc., used to write and execute integration test cases.
• API testing tools: such as Postman, SoapUI, etc., used to test the integration and data transfer of interfaces.
• Database testing tools: such as DbUnit, SQLUnit, etc., used to test database integration and data consistency.

4. Specific implementation methods:

Here's how integration testing is generally implemented:

• Environment preparation: Build a suitable test environment, including web and mobile browsers, devices, databases, etc.
• Test plan: Develop an integration test plan, including test scope, test environment, test data, etc.
• Test case design: Design integration test cases based on the interfaces and data transfer between modules to cover different integration situations.
• Test data preparation: Prepare test data, including simulating different input and expected output situations.
• Execute integration testing: Execute the designed integration test cases to verify whether the interfaces and data transfer between modules are normal.
• Problem management: For discovered integration problems or errors, record and track the problems to ensure that the problems are fixed in a timely manner.
• Test report: Generate an integration test report, including test results, problem statistics, test coverage and other information.

5. Examples of test case design:

The following are three examples of integration test case designs, targeting the integration between different modules of the online shopping system.

5.1.Test case 1:

• Test case name:add_to_cart_integration_test
• Test goal: Verify that the integration of adding items to the shopping cart with the shopping cart module works properly.
• Test prerequisites: The user has logged in and the product details page has been opened.
• Test steps:
  1. Click the "Add to Cart" button on the product details page.
  2. Check whether the shopping cart module receives correct product information.
• Expected results: The shopping cart module is expected to successfully receive and display the added product information.
• Actual results: Record the actual product information displayed by the shopping cart module.
• Judgment of test results: Compare actual product information with expected results to see if they are consistent.
• Note: This can ensure that product information is transmitted correctly and the shopping cart module is processed correctly.

5.2.Test case 2:

• Test case name:place_order_integration_test
• Test goal: Verify whether the integration of the order function, payment module, and order management module works normally.
• Test prerequisites: The user has logged in, has products in the shopping cart, and has filled in the complete delivery address and payment information.
• Test steps:
  1. Click the "Checkout" button on the shopping cart page.
  2. Go to the order confirmation page and check the order information.
  3. Click the "Confirm Payment" button.
  4. Check whether the payment module receives the correct order information.
  5. Check whether the order management module receives the correct order information.
• Expected results: The payment module and order management module are expected to successfully receive and display the correct order information.
• Actual results: Record the actual order information displayed by the payment module and order management module.
• Judgment of test results: Compare the actual order information with the expected results.
• Note: It can ensure that the order information is correctly transmitted and paid, and the order management module is processed correctly.

5.3.Test case 3:

• Test case name:search_integration_test
• Test goal: Verify that the integration of the search function and the product list module works properly.
• Test prerequisites: The user has logged in and entered the homepage of the website.
• Test steps:
  1. Enter keywords in the search box and click the search button.
  2. Check whether the product list module displays a product list that matches the keyword.
• Expected results: The expected product list module successfully displays the product list that matches the keyword.
• Actual results: Record the actual product list displayed by the product list module.
• Judgment of test results: Compare the actual product list with the expected results.
• Note: This ensures that the search function is triggered correctly and the relevant product lists are displayed correctly.