jdk-1.4/wicket/src/test/java/org/apache/wicket/util/parse/metapattern/MetaPatternTest.java

/*
 * 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.wicket.util.parse.metapattern;


import java.util.regex.Matcher;

import junit.framework.TestCase;

import org.apache.wicket.util.parse.metapattern.parsers.CommaSeparatedVariableParser;
import org.apache.wicket.util.parse.metapattern.parsers.IntegerVariableAssignmentParser;
import org.apache.wicket.util.parse.metapattern.parsers.TagNameParser;
import org.apache.wicket.util.parse.metapattern.parsers.VariableAssignmentParser;

/**
 * Test cases for this object
 * @author Jonathan Locke
 */
public final class MetaPatternTest extends TestCase
{
    /**
     *
     */
    public void testSimple()
    {
        // Parse "variable = <number>"
        final Group variable = new Group(MetaPattern.VARIABLE_NAME);
        final IntegerGroup value = new IntegerGroup(MetaPattern.INTEGER);
        final MetaPattern variableAssignment = new MetaPattern(new MetaPattern[] {variable,
                MetaPattern.OPTIONAL_WHITESPACE, MetaPattern.EQUALS,
                MetaPattern.OPTIONAL_WHITESPACE, value});

        final Matcher matcher = variableAssignment.matcher("foo = 9");
        assertTrue(matcher.matches());
        assertEquals("foo", matcher.group(1));
        assertEquals("9", matcher.group(2));
    }

    /**
     * Test assignment of variables.
     */
    public void testVariableAssignmentParser()
    {
        VariableAssignmentParser parser = new VariableAssignmentParser("foo = 9");
        assertTrue(parser.matches());
        assertEquals("foo", parser.getKey());
        assertEquals("9", parser.getValue());

        parser = new VariableAssignmentParser("foo=9");
        assertTrue(parser.matches());
        assertEquals("foo", parser.getKey());
        assertEquals("9", parser.getValue());
    }
    
    /**
     * Test assignment of integers.
     */
    public void testIntegerVariableAssignmentParser()
    {
        IntegerVariableAssignmentParser parser = 
            	new IntegerVariableAssignmentParser("foo = 9");
        assertTrue(parser.matches());
        assertEquals("foo", parser.getVariable());
        assertEquals(9, parser.getIntValue());
        assertEquals(9, parser.getLongValue());

        parser = new IntegerVariableAssignmentParser("foo=9");
	    assertTrue(parser.matches());
	    assertEquals("foo", parser.getVariable());
	    assertEquals(9, parser.getIntValue());
	    assertEquals(9, parser.getLongValue());

        parser = new IntegerVariableAssignmentParser("foo=a");
	    assertFalse(parser.matches());
    }

    /**
     * Test parsing of comma separated variables.
     */
    public void testCommaSeparatedVariableParser()
    {
        CommaSeparatedVariableParser parser = new CommaSeparatedVariableParser("a,b,c");
	    assertTrue(parser.matches());
	    assertEquals(3, parser.getValues().size());
	    assertEquals("a", parser.getValues().get(0));
	    assertEquals("b", parser.getValues().get(1));
	    assertEquals("c", parser.getValues().get(2));
	    
	    // no whitespaces will be removed
	    parser = new CommaSeparatedVariableParser(" a ,b, c , d ");
	    assertTrue(parser.matches());
	    assertEquals(4, parser.getValues().size());
	    assertEquals(" a ", parser.getValues().get(0));
	    assertEquals("b", parser.getValues().get(1));
	    assertEquals(" c ", parser.getValues().get(2));
	    assertEquals(" d ", parser.getValues().get(3));

	    // It'll care for "" and '' but it'll not remove them
	    parser = new CommaSeparatedVariableParser("'a ',\" b\",'c,d'");
	    assertTrue(parser.matches());
	    assertEquals(3, parser.getValues().size());
	    assertEquals("'a '", parser.getValues().get(0));
	    assertEquals("\" b\"", parser.getValues().get(1));
	    assertEquals("'c,d'", parser.getValues().get(2));

	    // But no escapes. Because no separator is following the 2nd "'",
	    // it'll stop parsing the string.
	    parser = new CommaSeparatedVariableParser("'a\'b, c");
	    assertTrue(parser.matches());
	    assertEquals(1, parser.getValues().size());
	    assertEquals("'a'", parser.getValues().get(0));
	    
	    parser = new CommaSeparatedVariableParser("a");
	    assertTrue(parser.matches());
	    assertEquals(1, parser.getValues().size());
	    assertEquals("a", parser.getValues().get(0));

	    // Empty elements are not supported
	    parser = new CommaSeparatedVariableParser("a,,");
	    assertTrue(parser.matches());
	    assertEquals(1, parser.getValues().size());
	    assertEquals("a", parser.getValues().get(0));
    }

    /**
     * Test the tag parser.
     */
    public void testTagParser()
    {
        String tag = "name";
        TagNameParser parser = new TagNameParser(tag);
        assertEquals(true, parser.matcher().matches());
        assertEquals("name", parser.getName());
        assertNull(parser.getNamespace());

        tag = "namespace:name";
        parser = new TagNameParser(tag);
        assertEquals(true, parser.matcher().matches());
        assertEquals("name", parser.getName());
        assertEquals("namespace", parser.getNamespace());

        tag = "namespace:";
        parser = new TagNameParser(tag);
        assertEquals(false, parser.matcher().matches());

        tag = ":names";
        parser = new TagNameParser(tag);
        assertEquals(false, parser.matcher().matches());
    }
}