public void testGetNonExistingMessageEventSubscription() {
EventSubscriptionQuery sampleEventSubscriptionQuery = mock(EventSubscriptionQuery.class);
when(runtimeServiceMock.createEventSubscriptionQuery()).thenReturn(sampleEventSubscriptionQuery);
when(sampleEventSubscriptionQuery.executionId(anyString())).thenReturn(sampleEventSubscriptionQuery);
when(sampleEventSubscriptionQuery.eventName(anyString())).thenReturn(sampleEventSubscriptionQuery);
when(sampleEventSubscriptionQuery.eventType(anyString())).thenReturn(sampleEventSubscriptionQuery);
when(sampleEventSubscriptionQuery.singleResult()).thenReturn(null);
String executionId = MockProvider.EXAMPLE_EXECUTION_ID;
String nonExistingMessageName = "aMessage";