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   * Licensed to the Apache Software Foundation (ASF) under one
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   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
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   *
   *     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.FilterExamples.FilterSingleMonthDataFn;
  import org.apache.beam.examples.cookbook.FilterExamples.ProjectionFn;
  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.PCollection;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Unit tests for {@link FilterExamples}. */
  @RunWith(JUnit4.class)
  public class FilterExamplesTest {
  
    private static final TableRow row1 =
        new TableRow()
            .set("month", "6")
            .set("day", "21")
            .set("year", "2014")
            .set("mean_temp", "85.3")
            .set("tornado", true);
    private static final TableRow row2 =
        new TableRow()
            .set("month", "7")
            .set("day", "20")
            .set("year", "2014")
            .set("mean_temp", "75.4")
            .set("tornado", false);
    private static final TableRow row3 =
        new TableRow()
            .set("month", "6")
            .set("day", "18")
            .set("year", "2014")
            .set("mean_temp", "45.3")
            .set("tornado", true);
  
    private static final TableRow outRow1 =
        new TableRow().set("year", 2014).set("month", 6).set("day", 21).set("mean_temp", 85.3);
    private static final TableRow outRow2 =
        new TableRow().set("year", 2014).set("month", 7).set("day", 20).set("mean_temp", 75.4);
    private static final TableRow outRow3 =
        new TableRow().set("year", 2014).set("month", 6).set("day", 18).set("mean_temp", 45.3);
  
    @Rule public TestPipeline p = TestPipeline.create();
  
    @Test
    public void testProjectionFn() {
      PCollection<TableRow> input = p.apply(Create.of(row1, row2, row3));
  
      PCollection<TableRow> results = input.apply(ParDo.of(new ProjectionFn()));
  
      PAssert.that(results).containsInAnyOrder(outRow1, outRow2, outRow3);
      p.run().waitUntilFinish();
    }
  
    @Test
    public void testFilterSingleMonthDataFn() {
      PCollection<TableRow> input = p.apply(Create.of(outRow1, outRow2, outRow3));
  
      PCollection<TableRow> results = input.apply(ParDo.of(new FilterSingleMonthDataFn(7)));
  
      PAssert.that(results).containsInAnyOrder(outRow2);
      p.run().waitUntilFinish();
    }
  }
  