/*
* TestRegexpParser.java
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 3
* of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307, USA.
*
* Copyright (c) 2003-2005 Per Cederberg. All rights reserved.
*/
package net.percederberg.grammatica.test;
import java.io.StringReader;
import net.percederberg.grammatica.parser.ParseException;
import net.percederberg.grammatica.parser.Parser;
import net.percederberg.grammatica.parser.ParserCreationException;
/**
* A test case for the generated RegexpParser class.
*
* @author Per Cederberg, <per at percederberg dot net>
* @version 1.0
*/
public class TestRegexpParser extends ParserTestCase {
/**
* The valid input string.
*/
private static final String VALID_INPUT =
"[a-z.]+(a|b).?";
/**
* The parse tree for the valid input string.
*/
private static final String VALID_OUTPUT =
"Expr(2001)\n" +
" Term(2002)\n" +
" Fact(2003)\n" +
" Atom(2004)\n" +
" LEFT_BRACKET(1003): \"[\", line: 1, col: 1\n" +
" CharacterSet(2006)\n" +
" Character(2007)\n" +
" CHAR(1014): \"a\", line: 1, col: 2\n" +
" Character(2007)\n" +
" CHAR(1014): \"-\", line: 1, col: 3\n" +
" Character(2007)\n" +
" CHAR(1014): \"z\", line: 1, col: 4\n" +
" Character(2007)\n" +
" DOT(1011): \".\", line: 1, col: 5\n" +
" RIGHT_BRACKET(1004): \"]\", line: 1, col: 6\n" +
" AtomModifier(2005)\n" +
" PLUS(1009): \"+\", line: 1, col: 7\n" +
" Fact(2003)\n" +
" Atom(2004)\n" +
" LEFT_PAREN(1001): \"(\", line: 1, col: 8\n" +
" Expr(2001)\n" +
" Term(2002)\n" +
" Fact(2003)\n" +
" Atom(2004)\n" +
" CHAR(1014): \"a\", line: 1, col: 9\n" +
" VERTICAL_BAR(1010): \"|\", line: 1, col: 10\n" +
" Expr(2001)\n" +
" Term(2002)\n" +
" Fact(2003)\n" +
" Atom(2004)\n" +
" CHAR(1014): \"b\", line: 1, col: 11\n" +
" RIGHT_PAREN(1002): \")\", line: 1, col: 12\n" +
" Fact(2003)\n" +
" Atom(2004)\n" +
" DOT(1011): \".\", line: 1, col: 13\n" +
" AtomModifier(2005)\n" +
" QUESTION(1007): \"?\", line: 1, col: 14\n";
/**
* The unexpected EOF input string.
*/
private static final String UNEXPECTED_EOF_INPUT = "(abc";
/**
* The unexpected character input string.
*/
private static final String UNEXPECTED_CHAR_INPUT = "a\nb";
/**
* The unexpected token input string.
*/
private static final String UNEXPECTED_TOKEN_INPUT = "abc)";
/**
* Creates a new test case.
*
* @param name the test case name
*/
public TestRegexpParser(String name) {
super(name);
}
/**
* Tests parsing a valid input string.
*/
public void testValidInput() {
parse(createParser(VALID_INPUT), VALID_OUTPUT);
}
/**
* Tests parsing with an unexpected EOF error.
*/
public void testUnexpectedEOF() {
failParse(createParser(UNEXPECTED_EOF_INPUT),
ParseException.UNEXPECTED_EOF_ERROR,
1,
5);
}
/**
* Tests parsing with an unexpected character error.
*/
public void testUnexpectedChar() {
failParse(createParser(UNEXPECTED_CHAR_INPUT),
ParseException.UNEXPECTED_CHAR_ERROR,
1,
2);
}
/**
* Tests parsing with an unexpected token error.
*/
public void testUnexpectedToken() {
failParse(createParser(UNEXPECTED_TOKEN_INPUT),
ParseException.UNEXPECTED_TOKEN_ERROR,
1,
4);
}
/**
* Creates a new parser.
*
* @param input the input to parse
*
* @return the parser created
*/
private Parser createParser(String input) {
Parser parser = null;
try {
parser = new RegexpParser(new StringReader(input));
parser.prepare();
} catch (ParserCreationException e) {
fail(e.getMessage());
}
return parser;
}
}