IssueTracker

Component used: WorkManager
Version used: 1.0.0-beta02
Devices/Android versions reproduced on: Pixel/Pie, Pixel2/Pie, Pixel3/Pie, Motorola Moto-G/Lollipop

Steps to reproduce:
Create a OneTimeWorkRequest like below, while it's running, close the app from app drawer. The first assumption that the enqueued task will run in background even when the app is closed is not true (Task is not started again even after an hour). Also the enqueued OneTimeWorkRequest won't start again on next app launch and stays in ENQUEUED state indefinitely.

    private void startTestWork() {
        Constraints testConstraints = new Constraints.Builder()
                .setRequiredNetworkType(NetworkType.CONNECTED)
                .setRequiresBatteryNotLow(true)
                .build();
        isMyWorkerRunning(TEST_WORKER_TAG);
        OneTimeWorkRequest testOneTimeWorkRequest = new OneTimeWorkRequest
                .Builder(TestWorker.class)
                .addTag(TEST_WORKER_TAG)
                .setInitialDelay(0, TimeUnit.SECONDS)
                .setConstraints(testConstraints)
                .build();
        WorkManager.getInstance().enqueueUniqueWork(TEST_WORKER_TAG, ExistingWorkPolicy.KEEP,
                testOneTimeWorkRequest);
    }