package storm.starter.bolt;
import backtype.storm.Config;
import backtype.storm.topology.BasicOutputCollector;
import backtype.storm.topology.OutputFieldsDeclarer;
import backtype.storm.tuple.Fields;
import backtype.storm.tuple.Tuple;
import backtype.storm.tuple.Values;
import com.google.common.collect.Lists;
import org.testng.annotations.DataProvider;
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 IntermediateRankingsBoltTest {
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 static final Object ANY_OBJECT = new Object();
private static final int ANY_TOPN = 10;
private static final long ANY_COUNT = 42;
private Tuple mockRankableTuple(Object obj, long count) {
Tuple tuple = MockTupleHelpers.mockTuple(ANY_NON_SYSTEM_COMPONENT_ID, ANY_NON_SYSTEM_STREAM_ID);
when(tuple.getValues()).thenReturn(Lists.newArrayList(ANY_OBJECT, ANY_COUNT));
return tuple;
}
@DataProvider
public Object[][] illegalTopN() {
return new Object[][]{ { -10 }, { -3 }, { -2 }, { -1 }, { 0 } };
}
@Test(expectedExceptions = IllegalArgumentException.class, dataProvider = "illegalTopN")
public void negativeOrZeroTopNShouldThrowIAE(int topN) {
new IntermediateRankingsBolt(topN);
}
@DataProvider
public Object[][] illegalEmitFrequency() {
return new Object[][]{ { -10 }, { -3 }, { -2 }, { -1 }, { 0 } };
}
@Test(expectedExceptions = IllegalArgumentException.class, dataProvider = "illegalEmitFrequency")
public void negativeOrZeroEmitFrequencyShouldThrowIAE(int emitFrequencyInSeconds) {
new IntermediateRankingsBolt(ANY_TOPN, emitFrequencyInSeconds);
}
@DataProvider
public Object[][] legalTopN() {
return new Object[][]{ { 1 }, { 2 }, { 3 }, { 20 } };
}
@Test(dataProvider = "legalTopN")
public void positiveTopNShouldBeOk(int topN) {
new IntermediateRankingsBolt(topN);
}
@DataProvider
public Object[][] legalEmitFrequency() {
return new Object[][]{ { 1 }, { 2 }, { 3 }, { 20 } };
}
@Test(dataProvider = "legalEmitFrequency")
public void positiveEmitFrequencyShouldBeOk(int emitFrequencyInSeconds) {
new IntermediateRankingsBolt(ANY_TOPN, emitFrequencyInSeconds);
}
@Test
public void shouldEmitSomethingIfTickTupleIsReceived() {
// given
Tuple tickTuple = MockTupleHelpers.mockTickTuple();
BasicOutputCollector collector = mock(BasicOutputCollector.class);
IntermediateRankingsBolt bolt = new IntermediateRankingsBolt();
// when
bolt.execute(tickTuple, collector);
// then
// verifyZeroInteractions(collector);
verify(collector).emit(any(Values.class));
}
@Test
public void shouldEmitNothingIfNormalTupleIsReceived() {
// given
Tuple normalTuple = mockRankableTuple(ANY_OBJECT, ANY_COUNT);
BasicOutputCollector collector = mock(BasicOutputCollector.class);
IntermediateRankingsBolt bolt = new IntermediateRankingsBolt();
// when
bolt.execute(normalTuple, collector);
// then
verifyZeroInteractions(collector);
}
@Test
public void shouldDeclareOutputFields() {
// given
OutputFieldsDeclarer declarer = mock(OutputFieldsDeclarer.class);
IntermediateRankingsBolt bolt = new IntermediateRankingsBolt();
// when
bolt.declareOutputFields(declarer);
// then
verify(declarer, times(1)).declare(any(Fields.class));
}
@Test
public void shouldSetTickTupleFrequencyInComponentConfigurationToNonZeroValue() {
// given
IntermediateRankingsBolt bolt = new IntermediateRankingsBolt();
// 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);
}
}