content: /*
   * 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.beam.sdk.util.construction.renderer;
  
  import static org.junit.Assert.assertEquals;
  
  import org.apache.beam.sdk.testing.TestPipeline;
  import org.apache.beam.sdk.transforms.Create;
  import org.apache.beam.sdk.transforms.Sum;
  import org.apache.beam.sdk.transforms.windowing.FixedWindows;
  import org.apache.beam.sdk.transforms.windowing.Window;
  import org.apache.beam.sdk.values.KV;
  import org.apache.beam.sdk.values.TimestampedValue;
  import org.joda.time.Duration;
  import org.joda.time.Instant;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for {@link PipelineDotRenderer}. */
  @RunWith(JUnit4.class)
  public class PipelineDotRendererTest {
    @Rule public final transient TestPipeline p = TestPipeline.create();
  
    @Test
    public void testEmptyPipeline() {
      assertEquals(
          "digraph {"
              + "    rankdir=LR"
              + "    subgraph cluster_0 {"
              + "        label = \"\""
              + "    }"
              + "}",
          PipelineDotRenderer.toDotString(p).replaceAll(System.lineSeparator(), ""));
    }
  
    @Test
    public void testCompositePipeline() {
      p.apply(
              Create.timestamped(
                  TimestampedValue.of(KV.of(1, 1), new Instant(1)),
                  TimestampedValue.of(KV.of(2, 2), new Instant(2))))
          .apply(Window.into(FixedWindows.of(Duration.millis(10))))
          .apply(Sum.integersPerKey());
      assertEquals(
          "digraph {"
              + "    rankdir=LR"
              + "    subgraph cluster_0 {"
              + "        label = \"\""
              + "        subgraph cluster_1 {"
              + "            label = \"Create.TimestampedValues\""
              + "            subgraph cluster_2 {"
              + "                label = \"Create.TimestampedValues/Create.Values\""
              + "                subgraph cluster_3 {"
              + "                    label = \"Create.TimestampedValues/Create.Values/Read(CreateSource)\""
              + "                    4 [label=\"Impulse\"]"
              + "                    subgraph cluster_5 {"
              + "                        label = \"Create.TimestampedValues/Create.Values/Read(CreateSource)/ParDo(OutputSingleSource)\""
              + "                        6 [label=\"ParMultiDo(OutputSingleSource)\"]"
              + "                        4 -> 6 [style=solid label=\"\"]"
              + "                    }"
              + "                    subgraph cluster_7 {"
              + "                        label = \"Create.TimestampedValues/Create.Values/Read(CreateSource)/ParDo(BoundedSourceAsSDFWrapper)\""
              + "                        8 [label=\"ParMultiDo(BoundedSourceAsSDFWrapper)\"]"
              + "                        6 -> 8 [style=solid label=\"\"]"
              + "                    }"
              + "                }"
              + "            }"
              + "            subgraph cluster_9 {"
              + "                label = \"Create.TimestampedValues/ParDo(ConvertTimestamps)\""
              + "                10 [label=\"ParMultiDo(ConvertTimestamps)\"]"
              + "                8 -> 10 [style=solid label=\"\"]"
              + "            }"
              + "        }"
              + "        subgraph cluster_11 {"
              + "            label = \"Window.Into()\""
              + "            12 [label=\"Window.Assign\"]"
              + "            10 -> 12 [style=solid label=\"\"]"
              + "        }"
              + "        subgraph cluster_13 {"
              + "            label = \"Combine.perKey(SumInteger)\""
              + "            14 [label=\"GroupByKey\"]"
              + "            12 -> 14 [style=solid label=\"\"]"
              + "            subgraph cluster_15 {"
              + "                label = \"Combine.perKey(SumInteger)/Combine.GroupedValues\""
              + "                subgraph cluster_16 {"
              + "                    label = \"Combine.perKey(SumInteger)/Combine.GroupedValues/ParDo(Anonymous)\""
              + "                    17 [label=\"ParMultiDo(Anonymous)\"]"
              + "                    14 -> 17 [style=solid label=\"\"]"
              + "                }"
              + "            }"
              + "        }"
              + "    }"
              + "}",
          PipelineDotRenderer.toDotString(p).replaceAll(System.lineSeparator(), ""));
    }
  }
  