package storm.starter.bolt;
import backtype.storm.Config;
import backtype.storm.task.OutputCollector;
import backtype.storm.task.TopologyContext;
import backtype.storm.topology.OutputFieldsDeclarer;
import backtype.storm.tuple.Fields;
import backtype.storm.tuple.Tuple;
import backtype.storm.tuple.Values;
import org.testng.annotations.Test;
import storm.starter.tools.MockTupleHelpers;
import java.util.Map;
import static org.fest.assertions.api.Assertions.assertThat;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.*;
public class RollingCountBoltTest {
private static final String ANY_NON_SYSTEM_COMPONENT_ID = "irrelevant_component_id";
private static final String ANY_NON_SYSTEM_STREAM_ID = "irrelevant_stream_id";
private Tuple mockNormalTuple(Object obj) {
Tuple tuple = MockTupleHelpers.mockTuple(ANY_NON_SYSTEM_COMPONENT_ID, ANY_NON_SYSTEM_STREAM_ID);
when(tuple.getValue(0)).thenReturn(obj);
return tuple;
}
@SuppressWarnings("rawtypes")
@Test
public void shouldEmitNothingIfNoObjectHasBeenCountedYetAndTickTupleIsReceived() {
// given
Tuple tickTuple = MockTupleHelpers.mockTickTuple();
RollingCountBolt bolt = new RollingCountBolt();
Map conf = mock(Map.class);
TopologyContext context = mock(TopologyContext.class);
OutputCollector collector = mock(OutputCollector.class);
bolt.prepare(conf, context, collector);
// when
bolt.execute(tickTuple);
// then
verifyZeroInteractions(collector);
}
@SuppressWarnings("rawtypes")
@Test
public void shouldEmitSomethingIfAtLeastOneObjectWasCountedAndTickTupleIsReceived() {
// given
Tuple normalTuple = mockNormalTuple(new Object());
Tuple tickTuple = MockTupleHelpers.mockTickTuple();
RollingCountBolt bolt = new RollingCountBolt();
Map conf = mock(Map.class);
TopologyContext context = mock(TopologyContext.class);
OutputCollector collector = mock(OutputCollector.class);
bolt.prepare(conf, context, collector);
// when
bolt.execute(normalTuple);
bolt.execute(tickTuple);
// then
verify(collector).emit(any(Values.class));
}
@Test
public void shouldDeclareOutputFields() {
// given
OutputFieldsDeclarer declarer = mock(OutputFieldsDeclarer.class);
RollingCountBolt bolt = new RollingCountBolt();
// when
bolt.declareOutputFields(declarer);
// then
verify(declarer, times(1)).declare(any(Fields.class));
}
@Test
public void shouldSetTickTupleFrequencyInComponentConfigurationToNonZeroValue() {
// given
RollingCountBolt bolt = new RollingCountBolt();
// when
Map<String, Object> componentConfig = bolt.getComponentConfiguration();
// then
assertThat(componentConfig).containsKey(Config.TOPOLOGY_TICK_TUPLE_FREQ_SECS);
Integer emitFrequencyInSeconds = (Integer) componentConfig.get(Config.TOPOLOGY_TICK_TUPLE_FREQ_SECS);
assertThat(emitFrequencyInSeconds).isGreaterThan(0);
}
}