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   * 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
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  package org.apache.beam.examples.cookbook;
  
  import com.google.api.services.bigquery.model.TableRow;
  import org.apache.beam.examples.cookbook.MinimalBigQueryTornadoes.ExtractTornadoesFn;
  import org.apache.beam.examples.cookbook.MinimalBigQueryTornadoes.FormatCountsFn;
  import org.apache.beam.sdk.testing.PAssert;
  import org.apache.beam.sdk.testing.TestPipeline;
  import org.apache.beam.sdk.transforms.Create;
  import org.apache.beam.sdk.transforms.ParDo;
  import org.apache.beam.sdk.values.KV;
  import org.apache.beam.sdk.values.PCollection;
  import org.apache.beam.sdk.values.TypeDescriptor;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableList;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Test case for {@link MinimalBigQueryTornadoes}. */
  @RunWith(JUnit4.class)
  public class MinimalBigQueryTornadoesTest {
    @Rule public TestPipeline p = TestPipeline.create();
  
    @Test
    public void testExtractTornadoes() {
      TableRow row = new TableRow().set("month", "6").set("tornado", true);
      PCollection<TableRow> input = p.apply(Create.of(ImmutableList.of(row)));
      PCollection<Integer> result = input.apply(ParDo.of(new ExtractTornadoesFn()));
      PAssert.that(result).containsInAnyOrder(6);
      p.run().waitUntilFinish();
    }
  
    @Test
    public void testNoTornadoes() {
      TableRow row = new TableRow().set("month", 6).set("tornado", false);
      PCollection<TableRow> inputs = p.apply(Create.of(ImmutableList.of(row)));
      PCollection<Integer> result = inputs.apply(ParDo.of(new ExtractTornadoesFn()));
      PAssert.that(result).empty();
      p.run().waitUntilFinish();
    }
  
    @Test
    public void testEmpty() {
      PCollection<KV<Integer, Long>> inputs =
          p.apply(Create.empty(new TypeDescriptor<KV<Integer, Long>>() {}));
      PCollection<String> result = inputs.apply(ParDo.of(new FormatCountsFn()));
      PAssert.that(result).empty();
      p.run().waitUntilFinish();
    }
  
    @Test
    public void testFormatCounts() {
      PCollection<KV<Integer, Long>> inputs =
          p.apply(Create.of(KV.of(3, 0L), KV.of(4, Long.MAX_VALUE), KV.of(5, Long.MIN_VALUE)));
      PCollection<String> result = inputs.apply(ParDo.of(new FormatCountsFn()));
      PAssert.that(result).containsInAnyOrder("3: 0", "4: " + Long.MAX_VALUE, "5: " + Long.MIN_VALUE);
      p.run().waitUntilFinish();
    }
  }
  