How can I effectively test error handling in Golang?

How can I effectively test error handling in Golang?

You can use the testing package in Golang to create test cases that simulate errors. Would you like an example?

Yes, please provide an example of testing a function that returns an error.

Sure! Here's a simple example:

func Divide(a, b int) (int, error) {
    if b == 0 {
        return 0, errors.New("division by zero")
    }
    return a / b, nil
}

func TestDivide(t *testing.T) {
    _, err := Divide(4, 0)
    if err == nil {
        t.Error("Expected an error but got none")
    }
}

This tests the error handling for division by zero.

That's helpful! How do I run these tests?

You can run your tests using the command go test in your terminal. It will automatically find and execute your test functions.