| /* |
| * 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.cep.utils; |
| |
| import org.apache.flink.streaming.api.watermark.Watermark; |
| import org.apache.flink.streaming.runtime.streamrecord.StreamRecord; |
| import org.apache.flink.streaming.util.OneInputStreamOperatorTestHarness; |
| |
| import java.util.Queue; |
| |
| import static org.hamcrest.core.Is.is; |
| import static org.junit.Assert.assertThat; |
| import static org.junit.Assert.assertTrue; |
| |
| /** |
| * Asserter for output from {@link OneInputStreamOperatorTestHarness}. |
| */ |
| public class OutputAsserter { |
| |
| private final Queue<?> output; |
| |
| private OutputAsserter(Queue<?> output) { |
| this.output = output; |
| } |
| |
| public static OutputAsserter assertOutput(Queue<?> output) { |
| return new OutputAsserter(output); |
| } |
| |
| private AssertionError fail(Object record) { |
| return new AssertionError("Received unexpected element: " + record); |
| } |
| |
| public <T> OutputAsserter nextElementEquals(T expected) { |
| final Object record = output.poll(); |
| final Object actual; |
| if (record instanceof StreamRecord) { |
| // This is in case we assert side output |
| actual = ((StreamRecord) record).getValue(); |
| } else { |
| // This is in case we assert the main output |
| actual = record; |
| } |
| assertThat(actual, is(expected)); |
| return this; |
| } |
| |
| public void hasNoMoreElements() { |
| assertTrue(output.isEmpty()); |
| } |
| |
| public OutputAsserter watermarkEquals(long timestamp) { |
| Object record = output.poll(); |
| if (record instanceof Watermark) { |
| Watermark watermark = (Watermark) record; |
| assertThat(watermark.getTimestamp(), is(timestamp)); |
| } else { |
| throw fail(record); |
| } |
| return this; |
| } |
| } |