Add utility functions.

tests/utils/assertions.nim

@@ -0,0 +1,10 @@
+import stew/results, options
+
+proc assertIsOk*[T, E](res: Result[T, E]) =
+  assert res.isOk, res.error
+
+proc assertIsErr*[T, E](res: Result[T, E], error: Option[E] = E.none()) =
+  assert res.isErr, "Result was \"Err\" but expected \"Ok\""
+  if error.isSome():
+    assert res.error == error.get(),
+      "Result was \"" & res.error & "\" but expected \"" & error.get() & "\""

tests/utils/async.nim

@@ -0,0 +1,10 @@
+import chronos/futures, stew/results, chronos
+
+proc waitForResult*[T](
+    fut: Future[T], timeout: Duration
+): Future[Result[T, string]] {.async.} =
+  try:
+    let val = await fut.wait(timeout)
+    return Result[T, string].ok(val)
+  except Exception as e:
+    return Result[T, string].err(e.msg)