[
https://issues.apache.org/jira/browse/FLINK-3648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15362407#comment-15362407
]
ASF GitHub Bot commented on FLINK-3648:
---------------------------------------
Github user aljoscha commented on a diff in the pull request:
https://github.com/apache/flink/pull/2199#discussion_r69552327
--- Diff:
flink-streaming-java/src/test/java/org/apache/flink/streaming/util/WindowingTestHarness.java
---
@@ -0,0 +1,217 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.flink.streaming.util;
+
+import org.apache.flink.api.common.ExecutionConfig;
+import org.apache.flink.api.common.state.ListStateDescriptor;
+import org.apache.flink.api.common.typeinfo.TypeInformation;
+import org.apache.flink.api.common.typeutils.TypeSerializer;
+import org.apache.flink.api.java.functions.KeySelector;
+import org.apache.flink.api.java.tuple.Tuple2;
+import org.apache.flink.streaming.api.functions.windowing.WindowFunction;
+import org.apache.flink.streaming.api.watermark.Watermark;
+import org.apache.flink.streaming.api.windowing.assigners.WindowAssigner;
+import org.apache.flink.streaming.api.windowing.triggers.Trigger;
+import org.apache.flink.streaming.api.windowing.windows.Window;
+import
org.apache.flink.streaming.runtime.operators.windowing.WindowOperator;
+import
org.apache.flink.streaming.runtime.operators.windowing.functions.InternalIterableWindowFunction;
+import org.apache.flink.streaming.runtime.streamrecord.StreamRecord;
+import org.apache.flink.streaming.runtime.tasks.StreamTaskState;
+import org.apache.flink.streaming.runtime.tasks.TestTimeServiceProvider;
+import org.apache.flink.util.Collector;
+import org.apache.flink.util.Preconditions;
+
+import java.util.Comparator;
+import java.util.concurrent.ConcurrentLinkedQueue;
+
+/**
+ * A utility class that facilitates the testing of custom {@link Trigger
Triggers} and
+ * {@link WindowAssigner WindowAssigners}. For examples on how to use this
class, the user
+ * can read the {@link
org.apache.flink.streaming.runtime.operators.windowing.WindowingTestHarnessTest}.
+ */
+public class WindowingTestHarness<K, IN, W extends Window> {
+
+ private final TestTimeServiceProvider timeServiceProvider;
+
+ private final OneInputStreamOperatorTestHarness<IN, IN> testHarness;
+
+ private final ConcurrentLinkedQueue<Object> expectedOutputs = new
ConcurrentLinkedQueue<>();
+
+ private volatile boolean isOpen = false;
+
+ public WindowingTestHarness(ExecutionConfig executionConfig,
+
WindowAssigner<? super IN, W> windowAssigner,
+
TypeInformation<K> keyType,
+
TypeInformation<IN> inputType,
+
TypeSerializer<W> windowSerializer,
--- End diff --
This should be retrievable from the `WindowAssigner`.
> Introduce Trigger Test Harness
> ------------------------------
>
> Key: FLINK-3648
> URL: https://issues.apache.org/jira/browse/FLINK-3648
> Project: Flink
> Issue Type: Sub-task
> Components: Streaming
> Reporter: Aljoscha Krettek
> Assignee: Kostas Kloudas
>
> As mentioned in
> https://docs.google.com/document/d/1Xp-YBf87vLTduYSivgqWVEMjYUmkA-hyb4muX3KRl08/edit#
> we should build on the processing-time clock introduced in FLINK-3646 and
> add a testing harness for triggers. The harness should allow inputting
> elements, updating watermark, updating processing-time and firing timers. The
> output of the trigger as well as state managed by the partitioned state
> abstraction should be observable to verify correct trigger behavior.
> Then, we should add tests for all triggers.
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