Awaitility is a small Java DSL for synchronizing asynchronous operations
Latest commit 548bcc2 Dec 6, 2018


Build Status Maven Central Javadoc

Testing asynchronous systems is hard. Not only does it require handling threads, timeouts and concurrency issues, but the intent of the test code can be obscured by all these details. Awaitility is a DSL that allows you to express expectations of an asynchronous system in a concise and easy to read manner. For example:

public void updatesCustomerStatus() throws Exception {
    // Publish an asynchronous event:
    // Awaitility lets you wait until the asynchronous operation completes:
    await().atMost(5, SECONDS).until(customerStatusIsUpdated());


  • 2018-12-06: Awaitility 3.1.5 is released with two new Kotlin extension functions: untilNull and has. See changelog for details.
  • 2018-12-05: Awaitility 3.1.4 is released with a new Kotlin extension function: untilNotNull. See changelog for details.
  • 2018-11-16: Awaitility 3.1.3 is released with improvements and changes. See changelog for details. Older news