/* $Id$
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.commons.digester3;

import static org.junit.Assert.assertEquals;

import java.util.List;

import org.apache.commons.digester3.RegexMatcher;
import org.apache.commons.digester3.RegexRules;
import org.apache.commons.digester3.Rule;
import org.apache.commons.digester3.SimpleRegexMatcher;
import org.junit.Test;

/**
 * Test case for RegexRules
 *
 * @author Robert Burrell Donkin
 */
public class RegexRulesTestCase
{

    /** Test regex that matches everything */
    @Test
    public void testMatchAll()
    {
        // set up which should match every rule
        RegexRules rules = new RegexRules( new RegexMatcher()
        {
            @Override
            public boolean match( String pathPattern, String rulePattern )
            {
                return true;
            }
        } );

        rules.add( "/a/b/b", new TestRule( "alpha" ) );
        rules.add( "/a/d", new TestRule( "beta" ) );
        rules.add( "/b", new TestRule( "gamma" ) );

        // now test a few patterns
        // check that all are return in the order which they were added
        List<Rule> matches = rules.match( "", "x/g/e", null, null );
        assertEquals( "Wrong number of rules returned (1)", 3, matches.size() );
        assertEquals( "Rule Out Of Order (1)", "alpha", ( (TestRule) matches.get( 0 ) ).getIdentifier() );
        assertEquals( "Rule Out Of Order (2)", "beta", ( (TestRule) matches.get( 1 ) ).getIdentifier() );
        assertEquals( "Rule Out Of Order (3)", "gamma", ( (TestRule) matches.get( 2 ) ).getIdentifier() );

        matches = rules.match( "", "/a", null, null );
        assertEquals( "Wrong number of rules returned (2)", 3, matches.size() );
        assertEquals( "Rule Out Of Order (4)", "alpha", ( (TestRule) matches.get( 0 ) ).getIdentifier() );
        assertEquals( "Rule Out Of Order (5)", "beta", ( (TestRule) matches.get( 1 ) ).getIdentifier() );
        assertEquals( "Rule Out Of Order (6)", "gamma", ( (TestRule) matches.get( 2 ) ).getIdentifier() );
    }

    /** Test regex matcher that matches nothing */
    @Test
    public void testMatchNothing()
    {
        // set up which should match every rule
        RegexRules rules = new RegexRules( new RegexMatcher()
        {
            @Override
            public boolean match( String pathPattern, String rulePattern )
            {
                return false;
            }
        } );

        rules.add( "/b/c/f", new TestRule( "alpha" ) );
        rules.add( "/c/f", new TestRule( "beta" ) );
        rules.add( "/b", new TestRule( "gamma" ) );

        // now test a few patterns
        // check that all are return in the order which they were added
        List<Rule> matches = rules.match( "", "/b/c", null, null );
        assertEquals( "Wrong number of rules returned (1)", 0, matches.size() );

        matches = rules.match( "", "/b/c/f", null, null );
        assertEquals( "Wrong number of rules returned (2)", 0, matches.size() );
    }

    /** Test a mixed regex - in other words, one that sometimes returns true and sometimes false */
    @Test
    public void testMatchMixed()
    {
        // set up which should match every rule
        RegexRules rules = new RegexRules( new RegexMatcher()
        {
            @Override
            public boolean match( String pathPattern, String rulePattern )
            {
                return ( rulePattern.equals( "/match/me" ) );
            }
        } );

        rules.add( "/match", new TestRule( "alpha" ) );
        rules.add( "/match/me", new TestRule( "beta" ) );
        rules.add( "/match", new TestRule( "gamma" ) );

        // now test a few patterns
        // check that all are return in the order which they were added
        List<Rule> matches = rules.match( "", "/match", null, null );
        assertEquals( "Wrong number of rules returned (1)", 1, matches.size() );
        assertEquals( "Wrong Rule (1)", "beta", ( (TestRule) matches.get( 0 ) ).getIdentifier() );

        matches = rules.match( "", "/a/match", null, null );
        assertEquals( "Wrong Rule (2)", "beta", ( (TestRule) matches.get( 0 ) ).getIdentifier() );
    }

    /** Test rules and clear methods */
    @Test
    public void testClear()
    {
        // set up which should match every rule
        RegexRules rules = new RegexRules( new RegexMatcher()
        {
            @Override
            public boolean match( String pathPattern, String rulePattern )
            {
                return true;
            }
        } );

        rules.add( "/abba", new TestRule( "alpha" ) );
        rules.add( "/ad/ma", new TestRule( "beta" ) );
        rules.add( "/gamma", new TestRule( "gamma" ) );

        // check that rules returns all rules in the order which they were added
        List<Rule> matches = rules.rules();
        assertEquals( "Wrong number of rules returned (1)", 3, matches.size() );
        assertEquals( "Rule Out Of Order (1)", "alpha", ( (TestRule) matches.get( 0 ) ).getIdentifier() );
        assertEquals( "Rule Out Of Order (2)", "beta", ( (TestRule) matches.get( 1 ) ).getIdentifier() );
        assertEquals( "Rule Out Of Order (3)", "gamma", ( (TestRule) matches.get( 2 ) ).getIdentifier() );

        matches = rules.match( "", "/eggs", null, null );
        assertEquals( "Wrong number of rules returned (2)", 3, matches.size() );
        assertEquals( "Rule Out Of Order (4)", "alpha", ( (TestRule) matches.get( 0 ) ).getIdentifier() );
        assertEquals( "Rule Out Of Order (5)", "beta", ( (TestRule) matches.get( 1 ) ).getIdentifier() );
        assertEquals( "Rule Out Of Order (6)", "gamma", ( (TestRule) matches.get( 2 ) ).getIdentifier() );

        rules.clear();
        matches = rules.rules();
        assertEquals( "Wrong number of rules returned (3)", 0, matches.size() );

        matches = rules.match( "", "/eggs", null, null );
        assertEquals( "Wrong number of rules returned (4)", 0, matches.size() );
    }

    @Test
    public void testSimpleRegexMatch()
    {

        SimpleRegexMatcher matcher = new SimpleRegexMatcher();

        // SimpleLog log = new SimpleLog("{testSimpleRegexMatch:SimpleRegexMatcher]");
        // log.setLevel(SimpleLog.LOG_LEVEL_TRACE);

        assertEquals( "Simple Regex Match '/alpha/beta/gamma' to '/alpha/beta/gamma' ", true,
                      matcher.match( "/alpha/beta/gamma", "/alpha/beta/gamma" ) );
        assertEquals( "Simple Regex Match '/alpha/beta/gamma' to '/alpha/beta/gamma/epsilon' ", false,
                      matcher.match( "/alpha/beta/gamma", "/alpha/beta/gamma/epsilon" ) );
        assertEquals( "Simple Regex Match '/alpha/beta/gamma' to '/alpha/*' ", true,
                      matcher.match( "/alpha/beta/gamma", "/alpha/*" ) );
        assertEquals( "Simple Regex Match '/alpha/beta/gamma' to '/alpha/*/gamma' ", true,
                      matcher.match( "/alpha/beta/gamma", "/alpha/*/gamma" ) );
        assertEquals( "Simple Regex Match '/alpha/beta/gamma' to '/alpha/*me' ", false,
                      matcher.match( "/alpha/beta/gamma", "/alpha/*me" ) );
        assertEquals( "Simple Regex Match '/alpha/beta/gamma' to '*/beta/gamma' ", true,
                      matcher.match( "/alpha/beta/gamma", "*/beta/gamma" ) );
        assertEquals( "Simple Regex Match '/alpha/beta/gamma' to '*/alpha/beta/gamma' ", true,
                      matcher.match( "/alpha/beta/gamma", "*/alpha/beta/gamma" ) );
        assertEquals( "Simple Regex Match '/alpha/beta/gamma' to '*/bet/gamma' ", false,
                      matcher.match( "/alpha/beta/gamma", "*/bet/gamma" ) );
        assertEquals( "Simple Regex Match '/alpha/beta/gamma' to 'alph?/beta/gamma' ", true,
                      matcher.match( "/alpha/beta/gamma", "/alph?/beta/gamma" ) );
        assertEquals( "Simple Regex Match '/alpha/beta/gamma' to '/?lpha/beta/gamma' ", true,
                      matcher.match( "/alpha/beta/gamma", "/?lpha/beta/gamma" ) );
        assertEquals( "Simple Regex Match '/alpha/beta/gamma' to '/alpha/?beta/gamma' ", false,
                      matcher.match( "/alpha/beta/gamma", "/alpha/?beta/gamma" ) );
        assertEquals( "Simple Regex Match '/alpha/beta/gamma' to '/alpha/?eta/*' ", true,
                      matcher.match( "/alpha/beta/gamma", "/alpha/?eta/*" ) );
        assertEquals( "Simple Regex Match '/alpha/beta/gamma' to '/alpha/?eta/*e' ", false,
                      matcher.match( "/alpha/beta/gamma", "/alpha/?eta/*e" ) );
        assertEquals( "Simple Regex Match '/alpha/beta/gamma' to '*/?et?/?amma' ", true,
                      matcher.match( "/alpha/beta/gamma", "*/?et?/?amma" ) );
        assertEquals( "Simple Regex Match '/alpha/beta/gamma/beta/epsilon/beta/gamma/epsilon' to "
                          + " '*/beta/gamma/?p*n' ", true,
                      matcher.match( "/alpha/beta/gamma/beta/epsilon/beta/gamma/epsilon", "*/beta/gamma/?p*n" ) );
        assertEquals( "Simple Regex Match '/alpha/beta/gamma/beta/epsilon/beta/gamma/epsilon' to "
            + " '*/beta/gamma/?p*no' ", false, matcher.match( "/alpha/beta/gamma", "*/beta/gamma/?p*no" ) );
    }
}