import CursoredList;
import CursoredListPrinter;

/**
 * A simple way to test cursored lists.  Usage:
 * <pre>
 *   CursoredListTester helper =
 *      new CursoredListTester(list, input, output);
 *   helper.run();
 * </pre>
 *
 * @author Samuel A. Rebelsky
 * @version 1.0 of May 2000
 */
public class CursoredListTester {
    // +--------+----------------------------------------
    // | Fields |
    // +--------+

    /** The list we're testing. */
    protected CursoredList list;

    /** Something to use for input. */
    protected SimpleInput input;

    /** Something to use for output. */
    protected SimpleOutput output;

    /** Up to ten cursors. */
    protected ListCursor[] cursors;

    // +--------------+----------------------------------
    // | Constructors |
    // +--------------+

    public CursoredListTester(CursoredList list,
                              SimpleInput input,
                              SimpleOutput output) {
        this.list = list;
        this.input = input;
        this.output = output;
        cursors = new ListCursor[10];
    } // CursoredListTester(CursoredList, SimpleInput, SimpleOutput)


    // +---------+---------------------------------------
    // | Methods |
    // +---------+

    public void run() {
        output.println("Starting with A");
        list.addToFront("A");
        CursoredListPrinter.print(output, list);
 
        output.println("Getting cursor 0 at the front of the list.");
        cursors[0] = list.newCursor();
        cursors[0].reset();

        output.println("Putting B after cursor 0.");
        list.addAfter("B", cursors[0]);       
        CursoredListPrinter.print(output, list);

        output.println("Replacing cursor 0 with C.");
        list.replaceAt(cursors[0], "C");
        CursoredListPrinter.print(output, list);

        output.println("Getting cursor 1 at the end of the list.");
        cursors[1] = list.newCursor();
        cursors[1].reset();
        cursors[1].advance();
        
        output.println("Adding D after cursor 0");
        list.addAfter("D", cursors[0]);
        CursoredListPrinter.print(output, list);
        
        output.println("Adding E after cursor 1");
        list.addAfter("E", cursors[1]);
        CursoredListPrinter.print(output, list);

        output.println("Adding F before cursor 0");
        list.addBefore("F", cursors[0]);
        CursoredListPrinter.print(output, list);
        
        output.println("Adding G before cursor 1");
        list.addBefore("G", cursors[1]);
        CursoredListPrinter.print(output, list);

        output.println("Putting H at the front");
        list.addToFront("H");
        CursoredListPrinter.print(output, list);

        output.println("Putting I at the end");
        list.addToEnd("I");
        CursoredListPrinter.print(output, list);

        output.println("Deleting cursor 1");
        list.deleteAt(cursors[1]);
        CursoredListPrinter.print(output, list);

        output.println("Resetting cursor 0");
        cursors[0].reset();

        output.println("Deleting cursor 0");
        list.deleteAt(cursors[0]);
        CursoredListPrinter.print(output, list);
    } // run()

} // class CursoredListTester