diff --git a/src/main/java/beamline/models/algorithms/StreamMiningAlgorithm.java b/src/main/java/beamline/models/algorithms/StreamMiningAlgorithm.java
index 2c8398c7ba12d344d08012e990907f06e46fa5a8..f0c4cf943da1cafd9ec851c782faae1560b4c76c 100644
--- a/src/main/java/beamline/models/algorithms/StreamMiningAlgorithm.java
+++ b/src/main/java/beamline/models/algorithms/StreamMiningAlgorithm.java
@@ -56,7 +56,7 @@ public abstract class StreamMiningAlgorithm<T extends Response> extends RichFlat
 	public long getProcessedEvents() {
 		try {
 			if (processedEvents == null || processedEvents.value() == null) {
-				return 0l;
+				return -1;
 			}
 			return processedEvents.value().longValue();
 		} catch (IOException e) {
diff --git a/src/test/java/beamline/tests/AlgorithmTest.java b/src/test/java/beamline/tests/AlgorithmTest.java
index 69997337a9c890c37ab44bf19c201a9d5ae05d3b..53c284315e64d3ff024c538712fb9a79f42019c2 100644
--- a/src/test/java/beamline/tests/AlgorithmTest.java
+++ b/src/test/java/beamline/tests/AlgorithmTest.java
@@ -4,71 +4,23 @@ import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.hasItems;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
-import java.io.Serializable;
-import java.util.ArrayList;
 import java.util.LinkedList;
 import java.util.List;
 
-import org.apache.flink.api.common.typeinfo.BasicTypeInfo;
-import org.apache.flink.api.common.typeinfo.Types;
-import org.apache.flink.streaming.api.datastream.DataStream;
 import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
-import org.apache.flink.streaming.api.operators.StreamFlatMap;
-import org.apache.flink.streaming.runtime.tasks.OneInputStreamTask;
-import org.apache.flink.streaming.runtime.tasks.OneInputStreamTaskTestHarness;
-import org.apache.flink.streaming.util.KeyedOneInputStreamOperatorTestHarness;
-import org.apache.flink.streaming.util.OneInputStreamOperatorTestHarness;
-import org.apache.flink.util.Collector;
-import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import beamline.events.BEvent;
 import beamline.models.algorithms.StreamMiningAlgorithm;
-import beamline.models.responses.Response;
 import beamline.models.responses.StringResponse;
-import beamline.sources.CSVLogSource;
 
 public class AlgorithmTest {
 
-//	private OneInputStreamOperatorTestHarness<String, Long> testHarness;
-//	private StreamMiningAlgorithm statefulFlatMapFunction;
-
-//	@BeforeEach
-//	public void setupTestHarness() throws Exception {
-//
-//		// instantiate user-defined function
-//		statefulFlatMapFunction = new StatefulFlatMapFunction();
-//
-//		// wrap user defined function into a the corresponding operator
-//		testHarness = new OneInputStreamOperatorTestHarness<>(new StreamFlatMap<>(statefulFlatMapFunction));
-//
-//		// optionally configured the execution environment
-//		testHarness.getExecutionConfig().setAutoWatermarkInterval(50);
-//
-//		// open the test harness (will also call open() on RichFunctions)
-//		testHarness.open();
-//	}
-
 	@Test
-	public void test_result() throws Exception {
-//		List<String> acts = new LinkedList<>();
-//		List<String> caseIds = new LinkedList<>();
-//		CSVLogSource source = new CSVLogSource("src/test/resources/sources/source.csv", 0, 1);
-//
-//		StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
-//		DataStream<BEvent> stream = env.addSource(source);
-//		stream.executeAndCollect().forEachRemaining((BEvent e) -> {
-//			acts.add(e.getEventName());
-//			caseIds.add(e.getTraceName());
-//		});
-//		
-//		assertEquals(5, acts.size());
-//		assertEquals(5, caseIds.size());
-//		
-//		assertThat(acts, hasItems("a11","a21","a22","a12","a23"));
-//		assertThat(caseIds, hasItems("c1","c2","c2","c1","c2"));
-		
+	public void test_result_1() throws Exception {
 		StreamMiningAlgorithm<StringResponse> m = new StreamMiningAlgorithm<StringResponse>() {
+			private static final long serialVersionUID = -8445717838576941924L;
+
 			@Override
 			public StringResponse ingest(BEvent event) throws Exception {
 				return new StringResponse(event.getProcessName() + event.getEventName() + event.getTraceName());
@@ -91,67 +43,19 @@ public class AlgorithmTest {
 		
 		assertEquals(4, events.size());
 		assertThat(events, hasItems("p3c1","p7c1","p11c1","p13c1"));
-		
-//		StreamMiningAlgorithm m = new StreamMiningAlgorithm() {
-//			private static final long serialVersionUID = 3268754545347297698L;
-//			
-//			@Override
-//			public Serializable ingest(BEvent event) {
-//				int product = 1;
-//				if (getLatestResponse() != null) {
-//					product = (int) getLatestResponse();
-//				}
-//				product *= Integer.parseInt(event.getEventName());
-//				setLatestResponse(-product);
-//				return product;
-//			}
-//		};
-		
-//		private OneInputStreamOperatorTestHarness<BEvent, Serializable> testHarness = new OneInputStreamOperatorTestHarness<BEvent, Serializable>(m);
-//		StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
-//		env.fromElements(
-//			BEvent.create("p", "3", "c1"),
-//			BEvent.create("p", "7", "c1"),
-//			BEvent.create("p", "11", "c1"),
-//			BEvent.create("p", "13", "c1")).keyBy(BEvent::getProcessName).map(m).print();
-//		env.execute();
-		
-//		Collector<BEvent> stream = mock
-		
-//		System.out.println(m.getProcessedEvents());
-		
-//		assertEquals(4l, m.getProcessedEvents());
-//		assertEquals(3003, m.getLatestResponse());
 	}
+	
+	@Test
+	public void test_result_2() throws Exception {
+		StreamMiningAlgorithm<StringResponse> m = new StreamMiningAlgorithm<StringResponse>() {
+			private static final long serialVersionUID = -8445717838576941924L;
 
-//	@Test
-//	public void test_hooks() throws Exception {
-//		StreamMiningAlgorithm<Integer, Integer> m = new StreamMiningAlgorithm<Integer, Integer>() {
-//			public Integer product = 1;
-//			
-//			@Override
-//			public Integer ingest(Integer event) {
-//				product *= event;
-//				setLatestResponse(-product);
-//				return product;
-//			}
-//		};
-//		
-//		List<Long> resultsBefore = new ArrayList<>();
-//		m.setOnBeforeEvent(() -> {
-//			resultsBefore.add(m.getProcessedEvents());
-//		});
-//		
-//		List<Long> resultsAfter = new ArrayList<>();
-//		m.setOnAfterEvent(() -> {
-//			resultsAfter.add(m.getProcessedEvents());
-//		});
-//		
-//		StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
-//		env.fromElements(3, 7, 11, 13).map(m);
-//		env.execute();
-//		
-//		assertThat(resultsBefore, hasItems(0l,1l,2l,3l));
-//		assertThat(resultsAfter, hasItems(1l,2l,3l,4l));
-//	}
+			@Override
+			public StringResponse ingest(BEvent event) throws Exception {
+				return new StringResponse(event.getProcessName() + event.getEventName() + event.getTraceName());
+			}
+		};
+		
+		assertEquals(-1, m.getProcessedEvents());
+	}
 }