AggregateItemReaderTests.java :  » J2EE » spring-batch-2.1.0 » org » springframework » batch » sample » domain » multiline » Java Open Source

package org.springframework.batch.sample.domain.multiline;

import static org.junit.Assert.*;
import java.util.Collection;

import org.junit.Before;
import org.junit.Test;
import org.springframework.batch.item.ItemReader;
import org.springframework.batch.sample.domain.multiline.AggregateItem;
import org.springframework.batch.sample.domain.multiline.AggregateItemReader;

public class AggregateItemReaderTests {

  private ItemReader<AggregateItem<String>> input;

  private AggregateItemReader<String> provider;

  @Before
  public void setUp() {
    // create mock for input
    input = new ItemReader<AggregateItem<String>>() {

      private int count = 0;

      public AggregateItem<String> read() {
        switch (count++) {
        case 0:
          return AggregateItem.getHeader();
        case 1:
        case 2:
        case 3:
          return new AggregateItem<String>("line");
        case 4:
          return AggregateItem.getFooter();
        default:
          return null;
        }
      }

    };
    // create provider
    provider = new AggregateItemReader<String>();
    provider.setItemReader(input);
  }

  @Test
  public void testNext() throws Exception {
    // read object
    Object result = provider.read();

    // it should be collection of 3 strings "line"
    Collection<?> lines = (Collection<?>) result;
    assertEquals(3, lines.size());

    for (Object line : lines) {
      assertEquals("line", line);
    }

    // read object again - it should return null
    assertNull(provider.read());

  }

}