Cross-Domain Testing Using Cypress

Introduction:

Imagine you have a website where people can apply for life insurance. To determine the insurance rates and eligibility, you need to fetch their credit scores. However, the credit scoring service is hosted on a different website.

To test this integration and ensure everything works correctly, we use cross-domain testing. It involves simulating the process of requesting credit scores from the external service and adjusting the website's behavior based on the received credit score.

Cross-Domain Testing:

During cross-domain testing, the website follows these steps:

1. The user initiates a life insurance application on the website.
2. The website makes a request to the credit scoring service API to fetch the customer's credit score.
3. The credit scoring service API responds with the credit score data.
4. The website adjusts its behavior based on the received credit score, such as calculating insurance premiums, determining eligibility, or suggesting suitable coverage options.

Testing Scenarios:

Cross-domain testing for this life insurance website may involve several scenarios, including:

1. Testing different credit score ranges to ensure the website responds correctly and presents appropriate options to users.
2. Simulating error responses from the credit scoring service to verify that the website handles them gracefully.
3. Verifying that the website accurately displays updated credit score data for each application.
4. Testing compatibility with different versions or updates of the credit scoring service API.

Cypress Implementation:

To perform cross-domain testing in Cypress for this life insurance website, we can utilize the framework's powerful features. Here are the key steps involved:

1. Intercepting Requests: Use?cy.intercept()?in Cypress to intercept requests made by the website to the credit scoring service API. This allows us to control the responses received during testing.
2. Providing Mock Responses: Within the intercept callback, provide mock responses with different credit score values or error scenarios to simulate various test cases. This ensures comprehensive testing of the website's behavior under different conditions.
3. Validating Behavior: With the received credit score data, validate that the website adjusts its behavior correctly. For example, verify that premium calculations or eligibility determinations align with the credit score provided.

Cypress Code:

Explanation of the above code:

In this simplified example, we intercept the request made by the website to the credit scoring service. We provide a mock response with a credit score of 750. Then, we visit the application page and wait for the credit score request to complete.

Next, we extract the credit score from the response and adjust the website's behavior accordingly.

If the credit score is 700 or higher, we expect to see a premium amount of $100; otherwise, it should be $200.

Conclusion:

By performing cross-domain testing using Cypress, we ensure that the website integrates correctly with the credit scoring service and responds appropriately to the received credit score. This helps validate the accuracy of premium calculations, eligibility determinations, and overall functionality related to credit scores in the context of the life insurance website.