Add waitFor on seq[Future], waitAll and more (#5189)

* Switch to unittest and speedup

* Make timers and callbacks fields public

lib/pure/asyncdispatch.nim

@@ -163,8 +163,8 @@ include includes/asyncfutures
 
 type
   PDispatcherBase = ref object of RootRef
-    timers: HeapQueue[tuple[finishAt: float, fut: Future[void]]]
-    callbacks: Deque[proc ()]
+    timers*: HeapQueue[tuple[finishAt: float, fut: Future[void]]]
+    callbacks*: Deque[proc ()]
 
 proc processTimers(p: PDispatcherBase) {.inline.} =
   #Process just part if timers at a step

tests/async/tasyncall.nim

@@ -2,19 +2,19 @@ discard """
   file: "tasyncall.nim"
   exitcode: 0
 """
-import times, sequtils
+import times, sequtils, unittest
 import asyncdispatch
 
 const
   taskCount = 10
-  sleepDuration = 500
+  sleepDuration = 50
 
 proc futureWithValue(x: int): Future[int] {.async.} =
   await sleepAsync(sleepDuration)
   return x
 
 proc futureWithoutValue() {.async.} =
-  await sleepAsync(1000)
+  await sleepAsync(sleepDuration)
 
 proc testFuturesWithValue(x: int): seq[int] =
   var tasks = newSeq[Future[int]](taskCount)
@@ -40,7 +40,8 @@ proc testVarargs(x, y, z: int): seq[int] =
 
   result = waitFor all(a, b, c)
 
-block:
+suite "tasyncall":
+  test "testFuturesWithValue":
     let
       startTime = cpuTime()
       results = testFuturesWithValue(42)
@@ -50,14 +51,14 @@ block:
     doAssert execTime * 1000 < taskCount * sleepDuration
     doAssert results == expected
 
-block:
+  test "testFuturesWithoutValues":
     let startTime = cpuTime()
     testFuturesWithoutValues()
     let execTime = cpuTime() - startTime
 
     doAssert execTime * 1000 < taskCount * sleepDuration
 
-block:
+  test "testVarargs":
     let
       startTime = cpuTime()
       results = testVarargs(1, 2, 3)
@@ -67,7 +68,7 @@ block:
     doAssert execTime * 100 < taskCount * sleepDuration
     doAssert results == expected
 
-block:
+  test "all on seq[Future]":
     let
       noIntFuturesFut = all(newSeq[Future[int]]())
       noVoidFuturesFut = all(newSeq[Future[void]]())