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   * "License"); you may not use this file except in compliance
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   *
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   * Unless required by applicable law or agreed to in writing, software
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  package org.apache.beam.examples.cookbook;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  
  import com.google.api.services.bigquery.model.TableRow;
  import java.util.List;
  import org.apache.beam.examples.cookbook.CombinePerKeyExamples.ExtractLargeWordsFn;
  import org.apache.beam.examples.cookbook.CombinePerKeyExamples.FormatShakespeareOutputFn;
  import org.apache.beam.sdk.transforms.DoFnTester;
  import org.apache.beam.sdk.values.KV;
  import org.hamcrest.CoreMatchers;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Unit tests for {@link CombinePerKeyExamples}. */
  @RunWith(JUnit4.class)
  public class CombinePerKeyExamplesTest {
  
    private static final TableRow row1 =
        new TableRow().set("corpus", "king_lear").set("word", "snuffleupaguses");
    private static final TableRow row2 =
        new TableRow().set("corpus", "macbeth").set("word", "antidisestablishmentarianism");
    private static final TableRow row3 =
        new TableRow().set("corpus", "king_lear").set("word", "antidisestablishmentarianism");
    private static final TableRow row4 = new TableRow().set("corpus", "macbeth").set("word", "bob");
    private static final TableRow row5 = new TableRow().set("corpus", "king_lear").set("word", "hi");
  
    static final TableRow[] ROWS_ARRAY = new TableRow[] {row1, row2, row3, row4, row5};
  
    private static final KV<String, String> tuple1 = KV.of("snuffleupaguses", "king_lear");
    private static final KV<String, String> tuple2 = KV.of("antidisestablishmentarianism", "macbeth");
    private static final KV<String, String> tuple3 =
        KV.of("antidisestablishmentarianism", "king_lear");
  
    private static final KV<String, String> combinedTuple1 =
        KV.of("antidisestablishmentarianism", "king_lear,macbeth");
    private static final KV<String, String> combinedTuple2 = KV.of("snuffleupaguses", "king_lear");
  
    @SuppressWarnings({"unchecked", "rawtypes"})
    static final KV<String, String>[] COMBINED_TUPLES_ARRAY =
        new KV[] {combinedTuple1, combinedTuple2};
  
    private static final TableRow resultRow1 =
        new TableRow().set("word", "snuffleupaguses").set("all_plays", "king_lear");
    private static final TableRow resultRow2 =
        new TableRow()
            .set("word", "antidisestablishmentarianism")
            .set("all_plays", "king_lear,macbeth");
  
    @Test
    public void testExtractLargeWordsFn() throws Exception {
      DoFnTester<TableRow, KV<String, String>> extractLargeWordsFn =
          DoFnTester.of(new ExtractLargeWordsFn());
      List<KV<String, String>> results = extractLargeWordsFn.processBundle(ROWS_ARRAY);
      assertThat(results, CoreMatchers.hasItem(tuple1));
      assertThat(results, CoreMatchers.hasItem(tuple2));
      assertThat(results, CoreMatchers.hasItem(tuple3));
    }
  
    @Test
    public void testFormatShakespeareOutputFn() throws Exception {
      DoFnTester<KV<String, String>, TableRow> formatShakespeareOutputFn =
          DoFnTester.of(new FormatShakespeareOutputFn());
      List<TableRow> results = formatShakespeareOutputFn.processBundle(COMBINED_TUPLES_ARRAY);
      assertThat(results, CoreMatchers.hasItem(resultRow1));
      assertThat(results, CoreMatchers.hasItem(resultRow2));
    }
  }
  