The MustCreate Pattern for Go Tests

1 comments

• bccdee 2 hours ago

  A fun quirk about Go that nobody tells you about is that a function with multiple return values can supply multiple arguments. So this:

      func must[T any](t T, err error) T {
          if err != nil {
              panic(err)
          }
          return t
      }
      
      func makeInt(i int) (int, error) {
          if i == 0 {
              return 0, fmt.Errorf("not zero")
          }
          return i, nil
      }
      
      func main() {
          i := must(makeInt(3))
      }
  

  is totally legal & works exactly how you'd expect it to!