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Ant example source code file (RegexpMatcherTest.java)

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

Java - Ant tags/keywords

aaaa, io, ioexception, ioexception, line1, line1, line4, line4, regexpmatcher, string, string, stringbuffer, trivial, util, vector, windows

The RegexpMatcherTest.java 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.tools.ant.util.regexp;

import java.io.IOException;
import java.util.Vector;

import junit.framework.TestCase;

/**
 * Tests for all implementations of the RegexpMatcher interface.
 *
 */
public abstract class RegexpMatcherTest extends TestCase {

    public final static String UNIX_LINE = "\n";

    private RegexpMatcher reg;

    public abstract RegexpMatcher getImplementation();

    protected final RegexpMatcher getReg() {return reg;}

    public RegexpMatcherTest(String name) {
        super(name);
    }

    public void setUp() {
        reg = getImplementation();
    }

    public void testMatches() {
        reg.setPattern("aaaa");
        assertTrue("aaaa should match itself", reg.matches("aaaa"));
        assertTrue("aaaa should match xaaaa", reg.matches("xaaaa"));
        assertTrue("aaaa shouldn\'t match xaaa", !reg.matches("xaaa"));
        reg.setPattern("^aaaa");
        assertTrue("^aaaa shouldn\'t match xaaaa", !reg.matches("xaaaa"));
        assertTrue("^aaaa should match aaaax", reg.matches("aaaax"));
        reg.setPattern("aaaa$");
        assertTrue("aaaa$ shouldn\'t match aaaax", !reg.matches("aaaax"));
        assertTrue("aaaa$ should match xaaaa", reg.matches("xaaaa"));
        reg.setPattern("[0-9]+");
        assertTrue("[0-9]+ should match 123", reg.matches("123"));
        assertTrue("[0-9]+ should match 1", reg.matches("1"));
        assertTrue("[0-9]+ shouldn\'t match \'\'", !reg.matches(""));
        assertTrue("[0-9]+ shouldn\'t match a", !reg.matches("a"));
        reg.setPattern("[0-9]*");
        assertTrue("[0-9]* should match 123", reg.matches("123"));
        assertTrue("[0-9]* should match 1", reg.matches("1"));
        assertTrue("[0-9]* should match \'\'", reg.matches(""));
        assertTrue("[0-9]* should match a", reg.matches("a"));
        reg.setPattern("([0-9]+)=\\1");
        assertTrue("([0-9]+)=\\1 should match 1=1", reg.matches("1=1"));
        assertTrue("([0-9]+)=\\1 shouldn\'t match 1=2", !reg.matches("1=2"));
    }

    public void testGroups() {
        reg.setPattern("aaaa");
        Vector v = reg.getGroups("xaaaa");
        assertEquals("No parens -> no extra groups", 1, v.size());
        assertEquals("Trivial match with no parens", "aaaa",
                     (String) v.elementAt(0));

        reg.setPattern("(aaaa)");
        v = reg.getGroups("xaaaa");
        assertEquals("Trivial match with single paren", 2, v.size());
        assertEquals("Trivial match with single paren, full match", "aaaa",
                     (String) v.elementAt(0));
        assertEquals("Trivial match with single paren, matched paren", "aaaa",
                     (String) v.elementAt(0));

        reg.setPattern("(a+)b(b+)");
        v = reg.getGroups("xaabb");
        assertEquals(3, v.size());
        assertEquals("aabb", (String) v.elementAt(0));
        assertEquals("aa", (String) v.elementAt(1));
        assertEquals("b", (String) v.elementAt(2));
    }

    public void testBugzillaReport14619() {
        reg.setPattern("^(.*)/src/((.*/)*)([a-zA-Z0-9_\\.]+)\\.java$");
        Vector v = reg.getGroups("de/tom/src/Google.java");
        assertEquals(5, v.size());
        assertEquals("de/tom", v.elementAt(1));
        assertEquals("", v.elementAt(2));
        assertEquals("", v.elementAt(3));
        assertEquals("Google", v.elementAt(4));
    }

    public void testCaseInsensitiveMatch() {
        reg.setPattern("aaaa");
        assertTrue("aaaa doesn't match AAaa", !reg.matches("AAaa"));
        assertTrue("aaaa matches AAaa ignoring case",
                   reg.matches("AAaa", RegexpMatcher.MATCH_CASE_INSENSITIVE));
    }


// make sure there are no issues concerning line separator interpretation
// a line separator for regex (perl) is always a unix line (ie \n)

    public void testParagraphCharacter() throws IOException {
        reg.setPattern("end of text$");
        assertTrue("paragraph character", !reg.matches("end of text\u2029"));
    }

    public void testLineSeparatorCharacter() throws IOException {
        reg.setPattern("end of text$");
        assertTrue("line-separator character", !reg.matches("end of text\u2028"));
    }

    public void testNextLineCharacter() throws IOException {
        reg.setPattern("end of text$");
        assertTrue("next-line character", !reg.matches("end of text\u0085"));
    }

    public void testStandaloneCR() throws IOException {
        reg.setPattern("end of text$");
        assertTrue("standalone CR", !reg.matches("end of text\r"));
    }

    public void testWindowsLineSeparator() throws IOException {
        reg.setPattern("end of text$");
        assertTrue("Windows line separator", !reg.matches("end of text\r\n"));
    }

    public void testWindowsLineSeparator2() throws IOException {
        reg.setPattern("end of text\r$");
        assertTrue("Windows line separator", reg.matches("end of text\r\n"));
    }

    public void testUnixLineSeparator() throws IOException {
        reg.setPattern("end of text$");
        assertTrue("Unix line separator", reg.matches("end of text\n"));
    }


    public void testMultiVersusSingleLine() throws IOException {
        StringBuffer buf = new StringBuffer();
        buf.append("Line1").append(UNIX_LINE);
        buf.append("starttest Line2").append(UNIX_LINE);
        buf.append("Line3 endtest").append(UNIX_LINE);
        buf.append("Line4").append(UNIX_LINE);
        String text = buf.toString();

        doStartTest1(text);
        doStartTest2(text);
        doEndTest1(text);
        doEndTest2(text);
    }

    protected void doStartTest1(String text) {
        reg.setPattern("^starttest");
        assertTrue("^starttest in default mode", !reg.matches(text));
        assertTrue("^starttest in single line mode",
               !reg.matches(text, RegexpMatcher.MATCH_SINGLELINE));
        assertTrue("^starttest in multi line mode",
               reg.matches(text, RegexpMatcher.MATCH_MULTILINE));
    }

    protected void doStartTest2(String text) {
        reg.setPattern("^Line1");
        assertTrue("^Line1 in default mode", reg.matches(text));
        assertTrue("^Line1 in single line mode",
               reg.matches(text, RegexpMatcher.MATCH_SINGLELINE));
        assertTrue("^Line1 in multi line mode",
               reg.matches(text, RegexpMatcher.MATCH_MULTILINE));
    }

    protected void doEndTest1(String text) {
        reg.setPattern("endtest$");
        assertTrue("endtest$ in default mode", !reg.matches(text));
        assertTrue("endtest$ in single line mode",
               !reg.matches(text, RegexpMatcher.MATCH_SINGLELINE));
        assertTrue("endtest$ in multi line mode",
               reg.matches(text, RegexpMatcher.MATCH_MULTILINE));
    }

    protected void doEndTest2(String text) {
        reg.setPattern("Line4$");
        assertTrue("Line4$ in default mode", reg.matches(text));
        assertTrue("Line4$ in single line mode",
               reg.matches(text, RegexpMatcher.MATCH_SINGLELINE));
        assertTrue("Line4$ in multi line mode",
               reg.matches(text, RegexpMatcher.MATCH_MULTILINE));
    }

}

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