/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 */

/*

 *

 *

 * (C) Copyright Taligent, Inc. 1996, 1997 - All Rights Reserved

 * (C) Copyright IBM Corp. 1996 - 1998 - All Rights Reserved

 *

 * Portions copyright (c) 2007 Sun Microsystems, Inc.

 * All Rights Reserved.

 *

 * The original version of this source code and documentation

 * is copyrighted and owned by Taligent, Inc., a wholly-owned

 * subsidiary of IBM. These materials are provided under terms

 * of a License Agreement between Taligent and Sun. This technology

 * is protected by multiple US and International patents.

 *

 * This notice and attribution to Taligent may not be removed.

 * Taligent is a registered trademark of Taligent, Inc.

 *

 * Permission to use, copy, modify, and distribute this software

 * and its documentation for NON-COMMERCIAL purposes and without

 * fee is hereby granted provided that this copyright notice

 * appears in all copies. Please refer to the file "copyright.html"

 * for further important copyright and licensing information.

 *

 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF

 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED

 * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A

 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR

 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR

 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.

 *

 */

import java.lang.reflect.*;

import java.util.Hashtable;

import java.util.Enumeration;

import java.util.Vector;

import java.io.*;

import java.text.*;

/**

 * RBTestFmwk is a base class for tests that can be run conveniently from

 * the command line as well as under the Java test harness.

 * <p>

 * Sub-classes implement a set of methods named Test<something>. Each

 * of these methods performs some test. Test methods should indicate

 * errors by calling either err or errln.  This will increment the

 * errorCount field and may optionally print a message to the log.

 * Debugging information may also be added to the log via the log

 * and logln methods.  These methods will add their arguments to the

 * log only if the test is being run in verbose mode.

 */

public class RBTestFmwk {

    //------------------------------------------------------------------------

    // Everything below here is boilerplate code that makes it possible

    // to add a new test by simply adding a function to an existing class

    //------------------------------------------------------------------------

    protected RBTestFmwk() {

        // Create a hashtable containing all the test methods.

        testMethods = new Hashtable();

        Method[] methods = getClass().getDeclaredMethods();

        for( int i=0; i<methods.length; i++ ) {

            if( methods[i].getName().startsWith("Test")

                    || methods[i].getName().startsWith("test") ) {

                testMethods.put( methods[i].getName(), methods[i] );

            }

        }

    }

    protected void run(String[] args) throws Exception

    {

        System.out.println(getClass().getName() + " {");

        indentLevel++;

        // Set up the log and reference streams.  We use PrintWriters in order to

        // take advantage of character conversion.  The JavaEsc converter will

        // convert Unicode outside the ASCII range to Java's \\uxxxx notation.

        log = new PrintWriter(System.out,true);

        // Parse the test arguments.  They can be either the flag

        // "-verbose" or names of test methods. Create a list of

        // tests to be run.

        Vector testsToRun = new Vector( args.length );

        for( int i=0; i<args.length; i++ ) {

            if( args[i].equals("-verbose") ) {

                verbose = true;

            }

            else if( args[i].equals("-prompt") ) {

                prompt = true;

            } else if (args[i].equals("-nothrow")) {

                nothrow = true;

            } else {

                Object m = testMethods.get( args[i] );

                if( m != null ) {

                    testsToRun.addElement( m );

                }

                else {

                    usage();

                    return;

                }

            }

        }

        // If no test method names were given explicitly, run them all.

        if( testsToRun.size() == 0 ) {

            Enumeration methodNames = testMethods.elements();

            while( methodNames.hasMoreElements() ) {

                testsToRun.addElement( methodNames.nextElement() );

            }

        }

        // Run the list of tests given in the test arguments

        for( int i=0; i<testsToRun.size(); i++ ) {

            int oldCount = errorCount;

            Method testMethod = (Method)testsToRun.elementAt(i);

            writeTestName(testMethod.getName());

            try {

                testMethod.invoke(this, new Object[0]);

            }

            catch( IllegalAccessException e ) {

                errln("Can't acces test method " + testMethod.getName());

            }

            catch( InvocationTargetException e ) {

                errorCount++;

                log.println("\nUncaught throwable thrown in test method "

                            + testMethod.getName());

                e.getTargetException().printStackTrace(this.log);

                if (!nothrow) {

                    throw new RuntimeException("Exiting...");

                }

            }

            writeTestResult(errorCount - oldCount);

        }

        indentLevel--;

        writeTestResult(errorCount);

        if (prompt) {

            System.out.println("Hit RETURN to exit...");

            try {

                System.in.read();

            }

            catch (IOException e) {

                System.out.println("Exception: " + e.toString() + e.getMessage());

            }

        }

        if (nothrow) {

            System.exit(errorCount);

        }

    }

    /**

     * Adds given string to the log if we are in verbose mode.

     */

    protected void log( String message ) {

        if( verbose ) {

            indent(indentLevel + 1);

            log.print( message );

            log.flush();

        }

    }

    protected void logln( String message ) {

        log(message + System.getProperty("line.separator"));

    }

    /**

     * Report an error

     */

    protected void err( String message ) {

        errorCount++;

        indent(indentLevel + 1);

        log.print( message );

        log.flush();

        if (!nothrow) {

            throw new RuntimeException(message);

        }

    }

    protected void errln( String message ) {

        err(message + System.getProperty("line.separator"));

    }

    protected void writeTestName(String testName) {

        indent(indentLevel);

        log.print(testName);

        log.flush();

        needLineFeed = true;

    }

    protected void writeTestResult(int count) {

        if (!needLineFeed) {

            indent(indentLevel);

            log.print("}");

        }

        needLineFeed = false;

        if (count != 0)

            log.println(" FAILED");

        else

            log.println(" Passed");

    }

    private final void indent(int distance) {

        if (needLineFeed) {

            log.println(" {");

            needLineFeed = false;

        }

        log.print(spaces.substring(0, distance * 2));

    }

    /**

     * Print a usage message for this test class.

     */

    void usage() {

        System.out.println(getClass().getName() +

                            ": [-verbose] [-nothrow] [-prompt] [test names]");

        System.out.println("test names:");

        Enumeration methodNames = testMethods.keys();

        while( methodNames.hasMoreElements() ) {

            System.out.println("\t" + methodNames.nextElement() );

        }

    }

    private boolean     prompt = false;

    private boolean     nothrow = false;

    protected boolean   verbose = false;

    private PrintWriter log;

    private int         indentLevel = 0;

    private boolean     needLineFeed = false;

    private int         errorCount = 0;

    private Hashtable testMethods;

    private final String spaces = "                                          ";

}