### Question:
Settings { public synchronized void removePendingRegistrationProvider() { OPFLog.logMethod(); preferences.remove(KEY_PENDING_REGISTRATION_PROVIDER); } private  Settings(@NonNull final Context context); @SuppressWarnings("PMD.NonThreadSafeSingleton") static Settings getInstance(@NonNull final Context context); @NonNull synchronized State getState(); synchronized void saveState(@NonNull final State state); synchronized void clear(); @Nullable synchronized String getLastProviderName(); synchronized void saveLastProvider(@Nullable final PushProvider provider); @Nullable synchronized String getLastAndroidId(); synchronized void saveLastAndroidId(@Nullable final String androidId); synchronized void saveUnregisteringProvider(@NonNull final String providerName); synchronized void removeUnregisteringProvider(@NonNull final String providerName); synchronized boolean isProviderUnregistrationPerforming(@NonNull final String providerName); synchronized void saveRegisteringProvider(@NonNull final String providerName); synchronized void removeRegisteringProvider(@NonNull final String providerName); synchronized boolean isProviderRegistrationPerforming(@NonNull final String providerName); synchronized void savePendingRegistrationProvider(@NonNull final String providerName); synchronized void removePendingRegistrationProvider(); @Nullable synchronized String getPendingRegistrationProvider(); synchronized void savePendingUnregistrationProvider(@NonNull final String providerName); synchronized void removePendingUnregistrationProvider(); @Nullable synchronized String getPendingUnregistrationProvider();  }### Answer:
@Test public void testRemovePendingRegistrationProvider() { String[] randomStrings = getRandomStrings(NUM_TESTS, RANDOM_STRING_LENGTH); for (int i = 0; i < NUM_TESTS; ++i) { settings.savePendingRegistrationProvider(randomStrings[i]); assertTrue(sharedPreferences.contains(KEY_PENDING_REGISTRATION_PROVIDER)); settings.removePendingRegistrationProvider(); assertFalse(sharedPreferences.contains(KEY_PENDING_REGISTRATION_PROVIDER)); } }