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Java example source code file (CharSetTest.java)

This example Java source code file (CharSetTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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Java - Java tags/keywords

a-z, a-za-z, charrange, charset, charsettest, exception, reflection, string, test

The CharSetTest.java Java example source code

/*
 * 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.lang3;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertTrue;

import java.lang.reflect.Modifier;

import org.junit.Test;

/**
 * Unit tests {@link org.apache.commons.lang3.CharSet}.
 */
public class CharSetTest  {

    //-----------------------------------------------------------------------
    @Test
    public void testClass() {
        assertTrue(Modifier.isPublic(CharSet.class.getModifiers()));
        assertFalse(Modifier.isFinal(CharSet.class.getModifiers()));
    }
    
    //-----------------------------------------------------------------------
    @Test
    public void testGetInstance() {
        assertSame(CharSet.EMPTY, CharSet.getInstance( (String) null));
        assertSame(CharSet.EMPTY, CharSet.getInstance(""));
        assertSame(CharSet.ASCII_ALPHA, CharSet.getInstance("a-zA-Z"));
        assertSame(CharSet.ASCII_ALPHA, CharSet.getInstance("A-Za-z"));
        assertSame(CharSet.ASCII_ALPHA_LOWER, CharSet.getInstance("a-z"));
        assertSame(CharSet.ASCII_ALPHA_UPPER, CharSet.getInstance("A-Z"));
        assertSame(CharSet.ASCII_NUMERIC, CharSet.getInstance("0-9"));
    }

    //-----------------------------------------------------------------------
    @Test
    public void testGetInstance_Stringarray() {
        assertEquals(null, CharSet.getInstance((String[]) null));
        assertEquals("[]", CharSet.getInstance(new String[0]).toString());
        assertEquals("[]", CharSet.getInstance(new String[] {null}).toString());
        assertEquals("[a-e]", CharSet.getInstance(new String[] {"a-e"}).toString());
    }
    
    //-----------------------------------------------------------------------
    @Test
    public void testConstructor_String_simple() {
        CharSet set;
        CharRange[] array;
        
        set = CharSet.getInstance((String) null);
        array = set.getCharRanges();
        assertEquals("[]", set.toString());
        assertEquals(0, array.length);
        
        set = CharSet.getInstance("");
        array = set.getCharRanges();
        assertEquals("[]", set.toString());
        assertEquals(0, array.length);
        
        set = CharSet.getInstance("a");
        array = set.getCharRanges();
        assertEquals("[a]", set.toString());
        assertEquals(1, array.length);
        assertEquals("a", array[0].toString());
        
        set = CharSet.getInstance("^a");
        array = set.getCharRanges();
        assertEquals("[^a]", set.toString());
        assertEquals(1, array.length);
        assertEquals("^a", array[0].toString());
        
        set = CharSet.getInstance("a-e");
        array = set.getCharRanges();
        assertEquals("[a-e]", set.toString());
        assertEquals(1, array.length);
        assertEquals("a-e", array[0].toString());
        
        set = CharSet.getInstance("^a-e");
        array = set.getCharRanges();
        assertEquals("[^a-e]", set.toString());
        assertEquals(1, array.length);
        assertEquals("^a-e", array[0].toString());
    }
    
    @Test
    public void testConstructor_String_combo() {
        CharSet set;
        CharRange[] array;
        
        set = CharSet.getInstance("abc");
        array = set.getCharRanges();
        assertEquals(3, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.is('a')));
        assertTrue(ArrayUtils.contains(array, CharRange.is('b')));
        assertTrue(ArrayUtils.contains(array, CharRange.is('c')));
        
        set = CharSet.getInstance("a-ce-f");
        array = set.getCharRanges();
        assertEquals(2, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.isIn('a', 'c')));
        assertTrue(ArrayUtils.contains(array, CharRange.isIn('e', 'f')));
        
        set = CharSet.getInstance("ae-f");
        array = set.getCharRanges();
        assertEquals(2, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.is('a')));
        assertTrue(ArrayUtils.contains(array, CharRange.isIn('e', 'f')));
        
        set = CharSet.getInstance("e-fa");
        array = set.getCharRanges();
        assertEquals(2, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.is('a')));
        assertTrue(ArrayUtils.contains(array, CharRange.isIn('e', 'f')));
        
        set = CharSet.getInstance("ae-fm-pz");
        array = set.getCharRanges();
        assertEquals(4, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.is('a')));
        assertTrue(ArrayUtils.contains(array, CharRange.isIn('e', 'f')));
        assertTrue(ArrayUtils.contains(array, CharRange.isIn('m', 'p')));
        assertTrue(ArrayUtils.contains(array, CharRange.is('z')));
    }
    
    @Test
    public void testConstructor_String_comboNegated() {
        CharSet set;
        CharRange[] array;
        
        set = CharSet.getInstance("^abc");
        array = set.getCharRanges();
        assertEquals(3, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.isNot('a')));
        assertTrue(ArrayUtils.contains(array, CharRange.is('b')));
        assertTrue(ArrayUtils.contains(array, CharRange.is('c')));
        
        set = CharSet.getInstance("b^ac");
        array = set.getCharRanges();
        assertEquals(3, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.is('b')));
        assertTrue(ArrayUtils.contains(array, CharRange.isNot('a')));
        assertTrue(ArrayUtils.contains(array, CharRange.is('c')));
        
        set = CharSet.getInstance("db^ac");
        array = set.getCharRanges();
        assertEquals(4, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.is('d')));
        assertTrue(ArrayUtils.contains(array, CharRange.is('b')));
        assertTrue(ArrayUtils.contains(array, CharRange.isNot('a')));
        assertTrue(ArrayUtils.contains(array, CharRange.is('c')));
        
        set = CharSet.getInstance("^b^a");
        array = set.getCharRanges();
        assertEquals(2, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.isNot('b')));
        assertTrue(ArrayUtils.contains(array, CharRange.isNot('a')));
        
        set = CharSet.getInstance("b^a-c^z");
        array = set.getCharRanges();
        assertEquals(3, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.isNotIn('a', 'c')));
        assertTrue(ArrayUtils.contains(array, CharRange.isNot('z')));
        assertTrue(ArrayUtils.contains(array, CharRange.is('b')));
    }

    @Test
    public void testConstructor_String_oddDash() {
        CharSet set;
        CharRange[] array;
        
        set = CharSet.getInstance("-");
        array = set.getCharRanges();
        assertEquals(1, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.is('-')));
        
        set = CharSet.getInstance("--");
        array = set.getCharRanges();
        assertEquals(1, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.is('-')));
        
        set = CharSet.getInstance("---");
        array = set.getCharRanges();
        assertEquals(1, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.is('-')));
        
        set = CharSet.getInstance("----");
        array = set.getCharRanges();
        assertEquals(1, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.is('-')));
        
        set = CharSet.getInstance("-a");
        array = set.getCharRanges();
        assertEquals(2, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.is('-')));
        assertTrue(ArrayUtils.contains(array, CharRange.is('a')));
        
        set = CharSet.getInstance("a-");
        array = set.getCharRanges();
        assertEquals(2, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.is('a')));
        assertTrue(ArrayUtils.contains(array, CharRange.is('-')));
        
        set = CharSet.getInstance("a--");
        array = set.getCharRanges();
        assertEquals(1, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.isIn('a', '-')));
        
        set = CharSet.getInstance("--a");
        array = set.getCharRanges();
        assertEquals(1, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.isIn('-', 'a')));
    }
    
    @Test
    public void testConstructor_String_oddNegate() {
        CharSet set;
        CharRange[] array;
        set = CharSet.getInstance("^");
        array = set.getCharRanges();
        assertEquals(1, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.is('^'))); // "^"
        
        set = CharSet.getInstance("^^");
        array = set.getCharRanges();
        assertEquals(1, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.isNot('^'))); // "^^"
        
        set = CharSet.getInstance("^^^");
        array = set.getCharRanges();
        assertEquals(2, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.isNot('^'))); // "^^"
        assertTrue(ArrayUtils.contains(array, CharRange.is('^'))); // "^"
        
        set = CharSet.getInstance("^^^^");
        array = set.getCharRanges();
        assertEquals(1, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.isNot('^'))); // "^^" x2
        
        set = CharSet.getInstance("a^");
        array = set.getCharRanges();
        assertEquals(2, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.is('a'))); // "a"
        assertTrue(ArrayUtils.contains(array, CharRange.is('^'))); // "^"
        
        set = CharSet.getInstance("^a-");
        array = set.getCharRanges();
        assertEquals(2, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.isNot('a'))); // "^a"
        assertTrue(ArrayUtils.contains(array, CharRange.is('-'))); // "-"
        
        set = CharSet.getInstance("^^-c");
        array = set.getCharRanges();
        assertEquals(1, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.isNotIn('^', 'c'))); // "^^-c"
        
        set = CharSet.getInstance("^c-^");
        array = set.getCharRanges();
        assertEquals(1, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.isNotIn('c', '^'))); // "^c-^"
        
        set = CharSet.getInstance("^c-^d");
        array = set.getCharRanges();
        assertEquals(2, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.isNotIn('c', '^'))); // "^c-^"
        assertTrue(ArrayUtils.contains(array, CharRange.is('d'))); // "d"
        
        set = CharSet.getInstance("^^-");
        array = set.getCharRanges();
        assertEquals(2, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.isNot('^'))); // "^^"
        assertTrue(ArrayUtils.contains(array, CharRange.is('-'))); // "-"
    }
    
    @Test
    public void testConstructor_String_oddCombinations() {
        CharSet set;
        CharRange[] array = null;
        
        set = CharSet.getInstance("a-^c");
        array = set.getCharRanges();
        assertTrue(ArrayUtils.contains(array, CharRange.isIn('a', '^'))); // "a-^"
        assertTrue(ArrayUtils.contains(array, CharRange.is('c'))); // "c"
        assertFalse(set.contains('b'));
        assertTrue(set.contains('^'));  
        assertTrue(set.contains('_')); // between ^ and a
        assertTrue(set.contains('c'));  
        
        set = CharSet.getInstance("^a-^c");
        array = set.getCharRanges();
        assertTrue(ArrayUtils.contains(array, CharRange.isNotIn('a', '^'))); // "^a-^"
        assertTrue(ArrayUtils.contains(array, CharRange.is('c'))); // "c"
        assertTrue(set.contains('b'));
        assertFalse(set.contains('^'));  
        assertFalse(set.contains('_')); // between ^ and a
        
        set = CharSet.getInstance("a- ^-- "); //contains everything
        array = set.getCharRanges();
        assertTrue(ArrayUtils.contains(array, CharRange.isIn('a', ' '))); // "a- "
        assertTrue(ArrayUtils.contains(array, CharRange.isNotIn('-', ' '))); // "^-- "
        assertTrue(set.contains('#'));
        assertTrue(set.contains('^'));
        assertTrue(set.contains('a'));
        assertTrue(set.contains('*'));
        assertTrue(set.contains('A'));
        
        set = CharSet.getInstance("^-b");
        array = set.getCharRanges();
        assertTrue(ArrayUtils.contains(array, CharRange.isIn('^','b'))); // "^-b"
        assertTrue(set.contains('b'));
        assertTrue(set.contains('_')); // between ^ and a
        assertFalse(set.contains('A'));
        assertTrue(set.contains('^')); 
        
        set = CharSet.getInstance("b-^");
        array = set.getCharRanges();
        assertTrue(ArrayUtils.contains(array, CharRange.isIn('^','b'))); // "b-^"
        assertTrue(set.contains('b'));
        assertTrue(set.contains('^'));
        assertTrue(set.contains('a')); // between ^ and b
        assertFalse(set.contains('c')); 
    }
        
    //-----------------------------------------------------------------------    
    @Test
    public void testEquals_Object() {
        final CharSet abc = CharSet.getInstance("abc");
        final CharSet abc2 = CharSet.getInstance("abc");
        final CharSet atoc = CharSet.getInstance("a-c");
        final CharSet atoc2 = CharSet.getInstance("a-c");
        final CharSet notatoc = CharSet.getInstance("^a-c");
        final CharSet notatoc2 = CharSet.getInstance("^a-c");
        
        assertFalse(abc.equals(null));
        
        assertTrue(abc.equals(abc));
        assertTrue(abc.equals(abc2));
        assertFalse(abc.equals(atoc));
        assertFalse(abc.equals(notatoc));
        
        assertFalse(atoc.equals(abc));
        assertTrue(atoc.equals(atoc));
        assertTrue(atoc.equals(atoc2));
        assertFalse(atoc.equals(notatoc));
        
        assertFalse(notatoc.equals(abc));
        assertFalse(notatoc.equals(atoc));
        assertTrue(notatoc.equals(notatoc));
        assertTrue(notatoc.equals(notatoc2));
    }
            
    @Test
    public void testHashCode() {
        final CharSet abc = CharSet.getInstance("abc");
        final CharSet abc2 = CharSet.getInstance("abc");
        final CharSet atoc = CharSet.getInstance("a-c");
        final CharSet atoc2 = CharSet.getInstance("a-c");
        final CharSet notatoc = CharSet.getInstance("^a-c");
        final CharSet notatoc2 = CharSet.getInstance("^a-c");
        
        assertEquals(abc.hashCode(), abc.hashCode());
        assertEquals(abc.hashCode(), abc2.hashCode());
        assertEquals(atoc.hashCode(), atoc.hashCode());
        assertEquals(atoc.hashCode(), atoc2.hashCode());
        assertEquals(notatoc.hashCode(), notatoc.hashCode());
        assertEquals(notatoc.hashCode(), notatoc2.hashCode());
    }
    
    //-----------------------------------------------------------------------    
    @Test
    public void testContains_Char() {
        final CharSet btod = CharSet.getInstance("b-d");
        final CharSet dtob = CharSet.getInstance("d-b");
        final CharSet bcd = CharSet.getInstance("bcd");
        final CharSet bd = CharSet.getInstance("bd");
        final CharSet notbtod = CharSet.getInstance("^b-d");
        
        assertFalse(btod.contains('a'));
        assertTrue(btod.contains('b'));
        assertTrue(btod.contains('c'));
        assertTrue(btod.contains('d'));
        assertFalse(btod.contains('e'));
        
        assertFalse(bcd.contains('a'));
        assertTrue(bcd.contains('b'));
        assertTrue(bcd.contains('c'));
        assertTrue(bcd.contains('d'));
        assertFalse(bcd.contains('e'));
        
        assertFalse(bd.contains('a'));
        assertTrue(bd.contains('b'));
        assertFalse(bd.contains('c'));
        assertTrue(bd.contains('d'));
        assertFalse(bd.contains('e'));
        
        assertTrue(notbtod.contains('a'));
        assertFalse(notbtod.contains('b'));
        assertFalse(notbtod.contains('c'));
        assertFalse(notbtod.contains('d'));
        assertTrue(notbtod.contains('e'));
        
        assertFalse(dtob.contains('a'));
        assertTrue(dtob.contains('b'));
        assertTrue(dtob.contains('c'));
        assertTrue(dtob.contains('d'));
        assertFalse(dtob.contains('e'));
      
        final CharRange[] array = dtob.getCharRanges();
        assertEquals("[b-d]", dtob.toString());
        assertEquals(1, array.length);
    }
    
    //-----------------------------------------------------------------------    
    @Test
    public void testSerialization() {
        CharSet set = CharSet.getInstance("a");
        assertEquals(set, SerializationUtils.clone(set)); 
        set = CharSet.getInstance("a-e");
        assertEquals(set, SerializationUtils.clone(set)); 
        set = CharSet.getInstance("be-f^a-z");
        assertEquals(set, SerializationUtils.clone(set)); 
    }
    
    //-----------------------------------------------------------------------    
    @Test
    public void testStatics() {
        CharRange[] array;
        
        array = CharSet.EMPTY.getCharRanges();
        assertEquals(0, array.length);
        
        array = CharSet.ASCII_ALPHA.getCharRanges();
        assertEquals(2, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.isIn('a', 'z')));
        assertTrue(ArrayUtils.contains(array, CharRange.isIn('A', 'Z')));
        
        array = CharSet.ASCII_ALPHA_LOWER.getCharRanges();
        assertEquals(1, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.isIn('a', 'z')));
        
        array = CharSet.ASCII_ALPHA_UPPER.getCharRanges();
        assertEquals(1, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.isIn('A', 'Z')));
        
        array = CharSet.ASCII_NUMERIC.getCharRanges();
        assertEquals(1, array.length);
        assertTrue(ArrayUtils.contains(array, CharRange.isIn('0', '9')));
    }
    
    @Test
    public void testJavadocExamples() throws Exception {
        assertFalse(CharSet.getInstance("^a-c").contains('a'));
        assertTrue(CharSet.getInstance("^a-c").contains('d'));
        assertTrue(CharSet.getInstance("^^a-c").contains('a'));
        assertFalse(CharSet.getInstance("^^a-c").contains('^'));
        assertTrue(CharSet.getInstance("^a-cd-f").contains('d'));
        assertTrue(CharSet.getInstance("a-c^").contains('^'));
        assertTrue(CharSet.getInstance("^", "a-c").contains('^'));        
    }
}

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