Initial Dever 0.0.1

test/rust/fixtures/async-stream.dever

@@ -0,0 +1,52 @@
+add(value: Int, state: Int) (next: Int) pure { next = value + state }
+
+type Message { Value(value: Int?) }
+
+count(value: Message, state: Int) (next: Int) pure { next = state + 1 }
+
+until(value: Int, state: Int) (next: Int, stop: Bool) pure { next = state + value
+ stop = value >= 2 }
+
+delayed(value: Int, state: Int) (next: Int) { dever.task.sleep(0)
+ next = state + value }
+
+sendOne(value: Int, target: Channel<Int>) () { send(target, value) }
+
+bad(value: Int) () { dever.task.sleep(-1) }
+
+consumeBad(values: AsyncStream<Int>) () { each(bad, values) }
+
+failed(value: dever.time.SleepResult.Done) (answer: Bool) recover("观察流失败") { answer = false }
+failed(value: dever.time.SleepResult.Failed(message)) (answer: Bool) recover("观察流失败") { answer = length(message) > 0 }
+
+cleanup() (answer: Bool) { values = stream([1, 2])
+ failure = failed(result(consumeBad(values)))
+ remaining = reduce(add, values, 0)
+ answer = failure and remaining == 0 }
+
+creation() (values: AsyncStream<Int>) { values = dever.task.ticks(1) }
+
+invalid() () { close(dever.task.ticks(0)) }
+
+verify() (answer: Bool) {
+ values = stream([1, 2, 3])
+ alias = values
+ total = reduce(add, values, 0)
+ empty = reduce(add, alias, 0)
+ limited = stream([1, 2, 3])
+ prefix = reduceUntil(until, limited, 0)
+ after = reduce(add, limited, 0)
+ async_total = reduce(delayed, stream([1, 2, 3]), 0)
+ bytes_total = reduce(add, stream(dever.bytes.fromText("AB")), 0)
+ channel_values = channel(Message, 2)
+ send(channel_values, Message.Value(null))
+ send(channel_values, Message.Value(2))
+ close(channel_values)
+ items = reduce(count, stream(channel_values), 0)
+ target = channel(Int, 2)
+ each(sendOne, stream([10, 20]), target)
+ first = receive(target)
+ second = receive(target)
+ ticks = reduceUntil(until, dever.task.ticks(1), 0)
+ answer = total == 6 and empty == 0 and prefix == 3 and after == 0 and async_total == 6 and bytes_total == 131 and items == 2 and first == 10 and second == 20 and ticks == 3
+}