Patient assertions for polling or retrying tasks.

For further information, I wrote this blog.

Task slowTask = Task();
int retryIntervalMs = 100;
int timeLimitMs = 1000;
Executors.newSingleThreadExecutor().execute(slowTask);
Patently.retry(() -> assertThat(slowTask.isComplete()).isTrue())
	.every(retryIntervalMs)
	.until(timeLimitMs);

In general, you can do the following for a task that is either a Runnable, Callable<T>, or Supplier<Boolean>:

Patiently.retry(task)
	.every(everyMs)
	.until(untilMs);

where long everyMs specifies the interval between retries (how often the task is executed) and long untilMs specifies the when the task will stop being retried. After untilMs, the task will be executed one final time and the result returned (or Exception thrown).

Alternatively, there is an all-in-one:

Patiently.retry(task, everyMs, untilMs);

Additionally, retry can be imported statically.