1 files changed, 68 insertions, 0 deletions
diff --git a/tests/async/tasyncall.nim b/tests/async/tasyncall.nim
new file mode 100644
index 000000000..60ba557cc
--- /dev/null
+++ b/tests/async/tasyncall.nim
@@ -0,0 +1,68 @@
+discard """
+  file: "tasyncall.nim"
+  exitcode: 0
+"""
+import times, sequtils
+import asyncdispatch
+
+const
+  taskCount = 10
+  sleepDuration = 500
+
+proc futureWithValue(x: int): Future[int] {.async.} =
+  await sleepAsync(sleepDuration)
+  return x
+
+proc futureWithoutValue() {.async.} =
+  await sleepAsync(1000)
+
+proc testFuturesWithValue(x: int): seq[int] =
+  var tasks = newSeq[Future[int]](taskCount)
+
+  for i in 0..<taskCount:
+    tasks[i] = futureWithValue(x)
+
+  result = waitFor all(tasks)
+
+proc testFuturesWithoutValues() =
+  var tasks = newSeq[Future[void]](taskCount)
+
+  for i in 0..<taskCount:
+    tasks[i] = futureWithoutValue()
+
+  waitFor all(tasks)
+
+proc testVarargs(x, y, z: int): seq[int] =
+  let
+    a = futureWithValue(x)
+    b = futureWithValue(y)
+    c = futureWithValue(z)
+
+  result = waitFor all(a, b, c)
+
+block:
+  let
+    startTime = cpuTime()
+    results = testFuturesWithValue(42)
+    expected = repeat(42, taskCount)
+    execTime = cpuTime() - startTime
+
+  doAssert execTime * 1000 < taskCount * sleepDuration
+  doAssert results == expected
+
+block:
+  let startTime = cpuTime()
+  testFuturesWithoutValues()
+  let execTime = cpuTime() - startTime
+
+  doAssert execTime * 1000 < taskCount * sleepDuration
+
+block:
+  let
+    startTime = cpuTime()
+    results = testVarargs(1, 2, 3)
+    expected = @[1, 2, 3]
+    execTime = cpuTime() - startTime
+
+  doAssert execTime * 100 < taskCount * sleepDuration
+  doAssert results == expected