You mentioned that you wrote tests — can you tell what kind of tests and what tools you used?

I wrote various types of tests in Go, mainly unit tests and integration tests. For unit tests, I used the standard testing package, which makes it easy to create test functions starting with Test.

Example of a simple unit test:

package mypackage

import "testing"

func TestSum(t *testing.T) {
    result := Sum(2, 3)
    expected := 5
    if result != expected {
        t.Errorf("Sum(2, 3) = %d; want %d", result, expected)
    }
}

For integration tests, I sometimes used frameworks like testify for convenient assertion methods and mocks. I also wrote tests that verify interactions with databases or external services, using test environments or mock servers.

Overall, the approach is to cover critical business logic with unit tests and verify component integration with integration tests.