AsyncWait

Wait, don't sleep :)

Helps in testing async methods in your Go program

If you need testing your async method, wait rather than sleep

Uses:

• Helps avoid undeterministic tests
• Helps have faster tests, because you wait enough (No more or less :))

Usage

go get github.com/rShetty/asyncwait
or, just add `github.com/rShetty/asyncwait` as dependency and preferably fix a version.

Code:

func doWork(workChan chan int, something Something)
  go func() {
    for i := 0; i < 5; i++ {
      workChan <- i
    }
  }

  something.call()
}

The above code pushes 5 int elements into a channel and the aim is to test this async job

Test:

workChan := make(chan int)
maxWaitInMillis := 100
pollIntervalInMillis := 20

doWork(workChan)

// Check for the length of channel to be 5
predicate := func() bool {
  return len(workChan) == 5 
}

successful := NewAsyncWait(maxWaitInMillis, pollIntervalInMillis).Check(predicate)

if successful != true {
  // You fail
}

// Assert call was called on something

Working examples of usage can be found here