What types of testing have you done, and which ones do you know?

I have experience with several types of testing:

• Unit testing — testing individual functions and methods. In Go, I use the testing package for writing tests, often with mocks to isolate dependencies.

• Integration testing — testing the interaction between components, such as with databases or external services.

• End-to-End (E2E) testing — testing the entire system as a whole, often through HTTP requests to APIs.

• Load testing — to evaluate performance and stability under load.

• Security testing — checking for vulnerabilities, for example through static code analysis and manual audits.

Here's an example of a simple unit test in Go:

func TestAdd(t *testing.T) {
    result := Add(2, 3)
    if result != 5 {
        t.Errorf("expected 5, got %d", result)
    }
}