What are Go interfaces and how do I test them?

What are Go interfaces and how do I test them?

Go interfaces are types that specify a contract by defining methods. They allow different types to be treated as the same type if they implement the same methods.

Can you give me an example of a Go interface?

Sure! Here's a simple example: type Reader interface { Read(p []byte) (n int, err error) }. Any type that has a Read method with this signature implements the Reader interface.

How do I write tests for a Go interface?

You can create a mock type that implements the interface and then use it in your tests. This allows you to test the behavior of your code without relying on the actual implementation.

What testing framework should I use for Go?

The built-in testing package is commonly used for writing tests in Go. You can also use frameworks like Testify for more advanced features.