@Test
public void getSourceIdFrom() {

    String sourceId = "82817051271953";
    String data = "/course/85196901216965/foldernodes/" + sourceId;
    Long extractedSourceId = notificationSubscriptionContextFactoryTestObject.getSourceIdFrom(data);
    assertEquals("Could not extract sourceId from '" + data + "'", Long.valueOf(sourceId), extractedSourceId);
}