edb02104d2
This PR replaces `assert!` with `assertBEq` to fix issues where asserts didn't trigger the `ctest` due to being in a separate task. This was caused by panics not being caught in tasks, while IO errors were handled by the `AsyncTask` if we use the `block` function on them. --------- Co-authored-by: Henrik Böving <hargonix@gmail.com>
75 lines
1.8 KiB
Text
75 lines
1.8 KiB
Text
import Std.Internal.Async
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import Std.Internal.UV
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import Std.Net.Addr
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open Std.Internal.IO.Async
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open Std.Net
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-- Using this function to create IO Error. For some reason the assert! is not pausing the execution.
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def assertBEq [BEq α] [ToString α] (actual expected : α) : IO Unit := do
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unless actual == expected do
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throw <| IO.userError <|
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s!"expected '{expected}', got '{actual}'"
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-- Define the Async monad
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structure Async (α : Type) where
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run : IO (AsyncTask α)
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namespace Async
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-- Monad instance for Async
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instance : Monad Async where
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pure x := Async.mk (pure (AsyncTask.pure x))
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bind ma f := Async.mk do
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let task ← ma.run
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task.bindIO fun a => (f a).run
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-- Await function to simplify AsyncTask handling
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def await (task : IO (AsyncTask α)) : Async α :=
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Async.mk task
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instance : MonadLift IO Async where
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monadLift io := Async.mk (io >>= (pure ∘ AsyncTask.pure))
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/-- Joe is another client. -/
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def runJoe (addr: SocketAddress) : Async Unit := do
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let client ← TCP.Socket.Client.mk
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await (client.connect addr)
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await (client.send (String.toUTF8 "hello robert!"))
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await client.shutdown
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def listenClose : IO Unit := do
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let addr := SocketAddressV4.mk (.ofParts 127 0 0 1) 8080
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let server ← TCP.Socket.Server.mk
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server.bind addr
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server.listen 128
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def acceptClose : IO Unit := do
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let addr := SocketAddressV4.mk (.ofParts 127 0 0 1) 8081
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let server ← TCP.Socket.Server.mk
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server.bind addr
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server.listen 128
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let joeTask ← (runJoe addr).run
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let task ← server.accept
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let client ← task.block
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let mes ← client.recv? 1024
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let msg ← mes.block
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assertBEq (String.fromUTF8? =<< msg) ("hello robert!")
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let mes ← client.recv? 1024
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let msg ← mes.block
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assertBEq (String.fromUTF8? =<< msg) none
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-- Waiting to avoid errors from escaping.
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joeTask.block
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#eval acceptClose
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#eval listenClose
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