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.runners.spark.structuredstreaming.translation.batch;
  
  import java.io.File;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.OutputStream;
  import java.io.PrintStream;
  import java.io.Serializable;
  import java.util.ArrayList;
  import java.util.List;
  import org.apache.beam.runners.spark.structuredstreaming.SparkSessionRule;
  import org.apache.beam.sdk.io.TextIO;
  import org.apache.beam.sdk.testing.PAssert;
  import org.apache.beam.sdk.testing.TestPipeline;
  import org.apache.beam.sdk.values.PCollection;
  import org.junit.BeforeClass;
  import org.junit.ClassRule;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.TemporaryFolder;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Test class for beam to spark source translation. */
  @RunWith(JUnit4.class)
  public class ComplexSourceTest implements Serializable {
    @ClassRule public static final TemporaryFolder TEMPORARY_FOLDER = new TemporaryFolder();
    private static File file;
    private static List<String> lines = createLines(30);
  
    @ClassRule public static final SparkSessionRule SESSION = new SparkSessionRule();
  
    @Rule
    public transient TestPipeline pipeline =
        TestPipeline.fromOptions(SESSION.createPipelineOptions());
  
    @BeforeClass
    public static void beforeClass() throws IOException {
      file = createFile(lines);
    }
  
    @Test
    public void testBoundedSource() {
      PCollection<String> input = pipeline.apply(TextIO.read().from(file.getPath()));
      PAssert.that(input).containsInAnyOrder(lines);
      pipeline.run();
    }
  
    private static File createFile(List<String> lines) throws IOException {
      File file = TEMPORARY_FOLDER.newFile();
      OutputStream outputStream = new FileOutputStream(file);
      try (PrintStream writer = new PrintStream(outputStream)) {
        for (String line : lines) {
          writer.println(line);
        }
      }
      return file;
    }
  
    private static List<String> createLines(int size) {
      List<String> lines = new ArrayList<>();
      for (int i = 0; i < size; ++i) {
        lines.add("word" + i);
      }
      return lines;
    }
  }
  