A little confused by the test case of `singleflight` of `internal/singleflight`.
Which is the codes singleflight <https://github.com/golang/go/blob/master/src/internal/singleflight/singleflight_test.go#L43> . 1. wg1 Purpose for wg1 is as commented as: // At least one goroutine is in fn now and all of them have at // least reached the line before the Do. Confused about `At least one goroutine is in fn `，what test situation for this? I mean, for example, if 'no one goroutine is in fn', would be any problem? 2. the channel `c` Each `fn` just read from `c`, and write value back, as codes: v := <-c c <- v // pump; make available for any future calls Don't really get the purpose. 3. got value The expect value of got is: 0<got<N. Why not 0<got<=N, I mean there is case got==N? -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/54d0186e-ac0c-4518-a187-68736037fb1bn%40googlegroups.com.
