66 lines
854 B
V
66 lines
854 B
V
const n = 1000
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const c = 100
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fn f(ch chan int) {
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for _ in 0 .. n {
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_ := <-ch
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}
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ch.close()
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}
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fn test_push_or_unbuffered() {
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ch := chan int{}
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go f(ch)
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mut j := 0
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for {
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ch <- j or { break }
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j++
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}
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assert j == n
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}
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fn test_push_or_buffered() {
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ch := chan int{cap: c}
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go f(ch)
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mut j := 0
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for {
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ch <- j or { break }
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j++
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}
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// we don't know how many elements are in the buffer when the channel
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// is closed, so check j against an interval
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assert j >= n
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assert j <= n + c
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}
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fn g(ch chan int, res chan int) {
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mut j := 0
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for {
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ch <- j or { break }
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j++
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}
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println('done $j')
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res <- j
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}
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fn test_many_senders() {
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ch := chan int{}
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res := chan int{}
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go g(ch, res)
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go g(ch, res)
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go g(ch, res)
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mut k := 0
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for _ in 0 .. 3 * n {
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k = <-ch
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}
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ch.close()
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mut sum := <-res
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sum += <-res
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sum += <-res
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assert sum == 3 * n
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}
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