Add tests to repository

tests/java/FlowSet.java

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+// This file is part of the Java Compiler Kit (JKit)
+//
+// The Java Compiler Kit is free software; you can 
+// redistribute it and/or modify it under the terms of the 
+// GNU General Public License as published by the Free Software 
+// Foundation; either version 2 of the License, or (at your 
+// option) any later version.
+//
+// The Java Compiler Kit is distributed in the hope
+// that it will be useful, but WITHOUT ANY WARRANTY; without 
+// even the implied warranty of MERCHANTABILITY or FITNESS FOR 
+// A PARTICULAR PURPOSE.  See the GNU General Public License 
+// for more details.
+//
+// You should have received a copy of the GNU General Public 
+// License along with the Java Compiler Kit; if not, 
+// write to the Free Software Foundation, Inc., 59 Temple Place, 
+// Suite 330, Boston, MA  02111-1307  USA
+//
+// (C) David James Pearce, 2009. 
+
+package jkit.jil.dfa;
+
+public interface FlowSet {
+
+	/**
+	 * FlowSets must be cloneable to facilitate multiple flows of execution
+	 * from conditionals
+	 * 
+	 * @return A Clone of the current FlowSet
+	 */
+	public Object clone();
+	
+	/**
+     * Computes the least upper bound of this flowset and that provided. <b>NOTE</b>
+     * the join operation has a subtle, yet important, requirement. If the
+     * result of the join must be equivalent to *this* flowset, then it must be
+     * the *same* flowset.
+     * 
+     * @param s
+     *            Another FlowSet to join with this
+     * @return true if this FlowSet has changed due to the computation, false
+     *         otherwise
+     */
+	public FlowSet join(FlowSet s);
+}

tests/java/ShipSquare.java

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+import javax.swing.ImageIcon;
+
+/**
+ * A Ship square represents a square that contains a battle ship, but has not
+ * yet been bombed. Ship Squares can be either visible or invisible (depending
+ * on which side they are).
+ * 
+ * @author djp
+ */
+public class ShipSquare extends GridSquare {	
+	private BattleShip ship; 
+	private Type type;
+	
+	public enum Type {
+		VERTICAL_TOP_END,
+		HORIZONTAL_MIDDLE		
+	};
+	
+	/**
+     * Construct a ShipSquare representing part of a battle ship (either a
+     * middle or end piece).
+     * 
+     */
+	public ShipSquare(Type type, BattleShip ship) {
+		this.type = type;
+		this.ship = ship;		
+	}
+	
+	/**
+	 * Get the ship that this square is part of.
+	 * @return
+	 */
+	public BattleShip getShip() { return ship; }
+	
+	/**
+	 * Determine what part of the ship this piece represents.
+	 * @return
+	 */
+	public Type getType() { return type; }
+}