How can I effectively test error handling in Go?

How can I effectively test error handling in Go?

To test error handling in Go, you can use the built-in testing package. Write test functions that check for expected errors.

Can you give me an example of a test case for error handling?

Sure! Here's a simple example:

func TestMyFunction(t *testing.T) {
    _, err := MyFunction()
    if err == nil {
        t.Errorf("Expected an error, got nil")
    }
}

What are some common mistakes to avoid when testing errors?

Common mistakes include not checking for errors at all, or assuming that an error will always be returned. Always validate your assumptions!

How do I handle multiple errors in a single function?

You can return multiple errors from a function by using a custom error type or a slice of errors. This way, you can capture all errors that occur.