Improve wait() test.

tests/testfut.nim

@@ -28,56 +28,56 @@ proc testFuture4(): Future[int] {.async.} =
     result = 0
 
   if result == 0:
-    return
+    return -1
 
   ## Test for immediately completed future and timeout = -1
   result = 0
   try:
     var res = await wait(testFuture2(), -1)
-    result = 1
+    result = 2
   except:
     result = 0
 
   if result == 0:
-    return
+    return -2
 
   ## Test for not immediately completed future and timeout = 0
   result = 0
   try:
     var res = await wait(testFuture1(), 0)
   except AsyncTimeoutError:
-    result = 1
+    result = 3
 
   if result == 0:
-    return
+    return -3
 
   ## Test for immediately completed future and timeout = 0
   result = 0
   try:
     var res = await wait(testFuture2(), 0)
-    result = 1
+    result = 4
   except:
     result = 0
 
   if result == 0:
-    return
+    return -4
 
   ## Test for future which cannot be completed in timeout period
   result = 0
   try:
     var res = await wait(testFuture1(), 50)
   except AsyncTimeoutError:
-    result = 1
+    result = 5
 
   if result == 0:
-    return
+    return -5
 
   ## Test for future which will be completed before timeout exceeded.
   try:
     var res = await wait(testFuture1(), 150)
-    result = 1
+    result = 6
   except:
-    result = 0
+    result = -6
 
 proc test1(): bool =
   var fut = testFuture1()
@@ -131,10 +131,8 @@ proc test4(): string =
   if fut.finished:
     result = testResult
 
-proc test5(): bool =
-  var res = waitFor(testFuture4())
-  if res == 1:
-    result = true
+proc test5(): int =
+  result = waitFor(testFuture4())
 
 when isMainModule:
   suite "Future[T] behavior test suite":
@@ -147,4 +145,4 @@ when isMainModule:
     test "Future[T] callbacks not changing order after removeCallback()":
       check test4() == "1245"
     test "wait[T]() test":
-      check test5() == true
+      check test5() == 6