import static org.junit.Assert.assertEquals;
import org.junit.Test;
import java.util.Arrays;

import org.junit.Test;

public class TestLargest {
  @Test
  public void testSimple() {
    assertEquals(9, Largest.largest(new int[] {9,8,7}));
  }
  @Test
  public void testBoundary() {
    assertEquals(Integer.MAX_VALUE, Largest.largest(new int[] {1,200}));
  }
  @Test
  public void testInverse() {
    assert(3!=Largest.largest(new int[] {1,3,7}));
  }
  @Test
  public void testCrosscheck() {
  	int[] a = new int[] {3,1,7};
  	Arrays.sort(a);
    assert(Largest.largest(new int[] {1,3,7}) == a[a.length-1]);
  }
  @Test
  public void testForceError() {
  	Largest.largest(new int[] {});
  	Largest.largest(null);
  }
  /*@Test
  public void testPerformCharacter() {
  }*/
}