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chan_utils_test.go
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/
chan_utils_test.go
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package discovery
import (
"sync"
"testing"
)
func countBools(c chan bool, wg *sync.WaitGroup, i *int) {
getMostRecentBool(c)
*i++
wg.Done()
}
func countStrings(c chan string, wg *sync.WaitGroup, i *int) {
getMostRecentString(c)
*i++
wg.Done()
}
func TestGetMostRecentBool(t *testing.T) {
wg := new(sync.WaitGroup)
expected := 0
c := make(chan bool, 5)
i := 0
// Sending an event at a time (and waiting between), we'll see each counted.
go countBools(c, wg, &i)
wg.Add(1)
c <- true
wg.Wait()
go countBools(c, wg, &i)
wg.Add(1)
c <- true
wg.Wait()
if expected = 2; i != expected {
t.Fatalf("wrong number of things: %d vs %d", i, expected)
}
i = 0
// now we'll see it fold 3 items down to 1.
wg.Add(1)
c <- true
c <- true
c <- true
go countBools(c, wg, &i)
wg.Wait()
if expected = 1; i != expected {
t.Fatalf("wrong number of things: %d vs %d", i, expected)
}
}
func TestGetMostRecentString(t *testing.T) {
wg := new(sync.WaitGroup)
expected := 0
c := make(chan string, 5)
i := 0
// Sending an event at a time (and waiting between), we'll see each counted.
go countStrings(c, wg, &i)
wg.Add(1)
c <- "1"
wg.Wait()
go countStrings(c, wg, &i)
wg.Add(1)
c <- "1"
wg.Wait()
if expected = 2; i != expected {
t.Fatalf("wrong number of things: %d vs %d", i, expected)
}
i = 0
// now we'll see it fold 3 items down to 1.
wg.Add(1)
c <- "1"
c <- "1"
c <- "1"
go countStrings(c, wg, &i)
wg.Wait()
if expected = 1; i != expected {
t.Fatalf("wrong number of things: %d vs %d", i, expected)
}
}