func TestDeadlockUnsynchronizedRead(t *testing.T) {
endless := Zipper(p.Generator(), p.Generator())
out1, out2 := Unzipper(endless)
<-out1
<-out2
<-out2
// expecting a read from out1, next pair is not unzipped yet
// <-out2 // uncomment for deadlock
}
func TestEndlessZipper(t *testing.T) {
endless := Zipper(p.Generator(), p.Generator())
for i := 0; i < 1000; i++ {
expected := PairInt{i, i}
actual := <-endless
if expected != actual {
t.Errorf("%v != %v", expected, actual)
}
}
}
func TestSecondChannelIndependency(t *testing.T) {
endless := Zipper(p.Generator(), p.Generator())
_, out2 := Unzipper(endless)
for expected := 0; expected < 200; expected++ {
second := <-out2
if second != expected {
t.Errorf("E: %d==%d", expected, second)
}
}
}
func TestFirstChannelIndependency(t *testing.T) {
endless := Zipper(p.Generator(), p.Generator())
out1, _ := Unzipper(endless)
for expected := 0; expected < 200; expected++ {
first := <-out1
if first != expected {
t.Errorf("E: %d==%d", expected, first)
}
}
}
func TestDeadlockInterruptedRead(t *testing.T) {
endless := Zipper(p.Generator(), p.Generator())
out1, out2 := Unzipper(endless)
// reading from both output channels initially
for i := 0; i < 20; i++ {
<-out1
<-out2
}
// stop reading from `out1` (uncomment for deadlock)
// for i := 0; i < 5; i++ { <-out2 }
}
func TestUnzipper(t *testing.T) {
endless := Zipper(p.Generator(), p.Generator())
out1, out2 := Unzipper(endless)
for expected := 0; expected < 500; expected++ {
first := <-out1
second := <-out2
if first != expected || second != expected {
t.Errorf("E: %d==%d==%d", expected, first, second)
}
}
// reading also works the other way around
for i := 0; i < 5; i++ {
<-out2
<-out1
}
}