| /* |
| * [The "BSD license"] |
| * Copyright (c) 2011 Terence Parr |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package org.antlr.test; |
| |
| import org.junit.Test; |
| |
| /** test runtime parse errors */ |
| public class TestSyntaxErrors extends BaseTest { |
| @Test public void testLL2() throws Exception { |
| String grammar = |
| "grammar T;\n" + |
| "a : 'a' 'b'" + |
| " | 'a' 'c'" + |
| ";\n" + |
| "q : 'e' ;\n"; |
| String found = execParser("T.g", grammar, "TParser", "TLexer", "a", "ae", false); |
| String expecting = "line 1:1 no viable alternative at input 'e'\n"; |
| String result = stderrDuringParse; |
| assertEquals(expecting, result); |
| } |
| |
| @Test public void testLL3() throws Exception { |
| String grammar = |
| "grammar T;\n" + |
| "a : 'a' 'b'* 'c'" + |
| " | 'a' 'b' 'd'" + |
| " ;\n" + |
| "q : 'e' ;\n"; |
| System.out.println(grammar); |
| String found = execParser("T.g", grammar, "TParser", "TLexer", "a", "abe", false); |
| String expecting = "line 1:2 no viable alternative at input 'e'\n"; |
| String result = stderrDuringParse; |
| assertEquals(expecting, result); |
| } |
| |
| @Test public void testLLStar() throws Exception { |
| String grammar = |
| "grammar T;\n" + |
| "a : 'a'+ 'b'" + |
| " | 'a'+ 'c'" + |
| ";\n" + |
| "q : 'e' ;\n"; |
| String found = execParser("T.g", grammar, "TParser", "TLexer", "a", "aaae", false); |
| String expecting = "line 1:3 no viable alternative at input 'e'\n"; |
| String result = stderrDuringParse; |
| assertEquals(expecting, result); |
| } |
| |
| @Test public void testSynPred() throws Exception { |
| String grammar = |
| "grammar T;\n" + |
| "a : (e '.')=> e '.'" + |
| " | (e ';')=> e ';'" + |
| " | 'z'" + |
| " ;\n" + |
| "e : '(' e ')'" + |
| " | 'i'" + |
| " ;\n"; |
| System.out.println(grammar); |
| String found = execParser("T.g", grammar, "TParser", "TLexer", "a", "((i))z", false); |
| String expecting = "line 1:0 no viable alternative at input '('\n"; |
| String result = stderrDuringParse; |
| assertEquals(expecting, result); |
| } |
| |
| @Test public void testLL1ErrorInfo() throws Exception { |
| String grammar = |
| "grammar T;\n" + |
| "start : animal (AND acClass)? service EOF;\n" + |
| "animal : (DOG | CAT );\n" + |
| "service : (HARDWARE | SOFTWARE) ;\n" + |
| "AND : 'and';\n" + |
| "DOG : 'dog';\n" + |
| "CAT : 'cat';\n" + |
| "HARDWARE: 'hardware';\n" + |
| "SOFTWARE: 'software';\n" + |
| "WS : ' ' {skip();} ;" + |
| "acClass\n" + |
| "@init\n" + |
| "{ System.out.println(computeContextSensitiveRuleFOLLOW().toString(tokenNames)); }\n" + |
| " : ;\n"; |
| String result = execParser("T.g", grammar, "TParser", "TLexer", "start", "dog and software", false); |
| String expecting = "{HARDWARE,SOFTWARE}\n"; |
| assertEquals(expecting, result); |
| } |
| } |