How can I effectively test error handling in my service layer?

How can I effectively test error handling in my service layer?

To test error handling in your service layer, you should simulate various error scenarios and ensure that your service responds appropriately.

What types of errors should I simulate?

You should consider simulating network failures, database errors, and invalid input scenarios to cover a wide range of potential issues.

How do I assert that the error handling works as expected?

You can use assertions in your tests to check that the correct error messages are returned and that the system behaves as intended.

Are there any tools you recommend for testing?

Yes, tools like JUnit for Java, Mocha for Node.js, or pytest for Python can be very effective for testing error handling.