//
// FILE:     CellGridTest.java
// AUTHOR:   Eugene Wallingford 
// DATE:     2012/10/13
// COMMENT:  This test case demonstrates a 2x2 grid of Cells
//           and sequences of moves leading to wins.
//
// MODIFIED: 2012/10/14 -- Eugene Wallingford
// CHANGE:   changed labels to make directions clearer
//
// MODIFIED: 2012/10/17 -- Eugene Wallingford
// CHANGE:   changed name of isWin() to isStraight()
//

import junit.framework.TestCase;

public class CellGridTest extends TestCase {
  
  private Cell upperLeft;
  private Cell lowerLeft;
  private Cell upperRight;
  private Cell lowerRight;
    
  protected void setUp() {
    upperLeft  = new Cell();
    lowerLeft  = new Cell();
    upperRight = new Cell();
    lowerRight = new Cell();
    
    upperLeft.accept( 'E', upperRight );
    upperLeft.accept( 'S', lowerLeft );
    
    upperRight.accept( 'W', upperLeft );
    upperRight.accept( 'S', lowerRight );
    
    lowerLeft.accept( 'E', lowerRight );
    lowerLeft.accept( 'N', upperLeft );
    
    lowerRight.accept( 'W', lowerLeft );
    lowerRight.accept( 'N', upperRight );
  }
  
  public void testSimpleStraight() {
    lowerLeft.move ( 'N', 'x' );
    upperRight.move( 'W', 'o' );
    lowerLeft.move ( 'N', 'x' );
    assertTrue( lowerLeft.isStraight( 'N' ) );
  }
  
  public void testLongerStraight() {
    lowerLeft.move ( 'N', 'x' );
    upperLeft.move ( 'S', 'o' );
    upperRight.move( 'W', 'x' );
    upperLeft.move ( 'S', 'o' );
    assertTrue( upperLeft.isStraight( 'S' ) );
  }
  
  public void testDiscoveredStraight() {
    lowerLeft.move ( 'N', 'x' );
    upperRight.move( 'W', 'o' );
    upperRight.move( 'W', 'x' );
    upperRight.move( 'W', 'o' );
    assertTrue( lowerLeft.isStraight( 'N' ) );
  }
  
  public void testTwoDiscoveredStraights() {
    lowerLeft.move ( 'N', 'x' );
    upperRight.move( 'W', 'o' );
    upperRight.move( 'S', 'x' );
    upperRight.move( 'W', 'o' );
    assertTrue(  upperLeft.isStraight( 'S' ) );
    assertTrue( upperRight.isStraight( 'S' ) );
  }
}