/*
* Copyright 2005 JBoss Inc
*
* Licensed 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.drools.lang;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.*;
import org.antlr.runtime.ANTLRStringStream;
import org.antlr.runtime.CharStream;
import org.antlr.runtime.CommonTokenStream;
import org.antlr.runtime.Lexer;
import org.antlr.runtime.TokenStream;
import org.antlr.runtime.tree.Tree;
import org.drools.base.evaluators.EvaluatorRegistry;
import org.drools.compiler.DroolsParserException;
import org.drools.lang.dsl.DefaultExpander;
public class ErrorsParserTest {
private DRLParser parser;
@Before
public void setUp() throws Exception {
this.parser = null;
// initializes pluggable operators
new EvaluatorRegistry();
}
@After
public void tearDown() throws Exception {
this.parser = null;
}
@Test
public void testNotBindindShouldBarf() throws Exception {
final DRLParser parser = parseResource( "not_with_binding_error.drl" );
parser.compilationUnit();
assertTrue( parser.hasErrors() );
}
@Test
public void testExpanderErrorsAfterExpansion() throws Exception {
final String name = "expander_post_errors.dslr";
final Expander expander = new DefaultExpander();
final String expanded = expander.expand( this.getReader( name ) );
final DRLParser parser = parse( name,
expanded );
parser.compilationUnit();
assertTrue( parser.hasErrors() );
assertEquals( 1,
parser.getErrors().size() );
DroolsParserException err = (DroolsParserException) parser.getErrors().get( 0 );
assertEquals( 6,
err.getLineNumber() );
}
@Test
public void testInvalidSyntax_Catches() throws Exception {
parseResource( "invalid_syntax.drl" ).compilationUnit();
assertTrue( this.parser.hasErrors() );
}
@Test
public void testMultipleErrors() throws Exception {
parseResource( "multiple_errors.drl" ).compilationUnit();
assertTrue( this.parser.hasErrors() );
assertEquals( 2,
this.parser.getErrors().size() );
}
@Test
public void testPackageGarbage() throws Exception {
parseResource( "package_garbage.drl" ).compilationUnit();
assertTrue( this.parser.hasErrors() );
}
@Test
public void testEvalWithSemicolon() throws Exception {
parseResource( "eval_with_semicolon.drl" ).compilationUnit();
assertTrue( this.parser.hasErrors() );
assertEquals( 1,
this.parser.getErrorMessages().size() );
assertEquals( "ERR 102",
this.parser.getErrors().get( 0 ).getErrorCode() );
}
@Test
public void testLexicalError() throws Exception {
parseResource( "lex_error.drl" ).compilationUnit();
assertTrue( parser.hasErrors() );
}
@Test
public void testTempleteError() throws Exception {
parseResource( "template_test_error.drl" ).compilationUnit();
assertTrue( parser.hasErrors() );
}
@Test
public void testErrorMessageForMisplacedParenthesis() throws Exception {
final DRLParser parser = parseResource( "misplaced_parenthesis.drl" );
parser.compilationUnit();
assertTrue( "Parser should have raised errors",
parser.hasErrors() );
assertEquals( 1,
parser.getErrors().size() );
assertEquals( "ERR 102",
parser.getErrors().get( 0 ).getErrorCode() );
}
@Test
public void testNPEOnParser() throws Exception {
final DRLParser parser = parseResource( "npe_on_parser.drl" );
parser.compilationUnit();
assertTrue( "Parser should have raised errors",
parser.hasErrors() );
assertEquals( 1,
parser.getErrors().size() );
assertTrue( parser.getErrors().get( 0 ).getErrorCode().equals( "ERR 102" ) );
}
@Test
public void testCommaMisuse() throws Exception {
final DRLParser parser = parseResource( "comma_misuse.drl" );
try {
parser.compilationUnit();
assertTrue( "Parser should have raised errors",
parser.hasErrors() );
} catch ( NullPointerException npe ) {
fail( "Should not raise NPE" );
}
}
private DRLParser parse(final String text) throws Exception {
this.parser = newParser( newTokenStream( newLexer( newCharStream( text ) ) ) );
return this.parser;
}
private DRLParser parse(final String source,
final String text) throws Exception {
this.parser = newParser( newTokenStream( newLexer( newCharStream( text ) ) ) );
// this.parser.setSource( source );
return this.parser;
}
private Reader getReader(final String name) throws Exception {
final InputStream in = getClass().getResourceAsStream( name );
return new InputStreamReader( in );
}
private DRLParser parseResource(final String name) throws Exception {
final Reader reader = getReader( name );
final StringBuilder text = new StringBuilder();
final char[] buf = new char[1024];
int len = 0;
while ( (len = reader.read( buf )) >= 0 ) {
text.append( buf,
0,
len );
}
return parse( name,
text.toString() );
}
private CharStream newCharStream(final String text) {
return new ANTLRStringStream( text );
}
private DRLLexer newLexer(final CharStream charStream) {
return new DRLLexer( charStream );
}
private TokenStream newTokenStream(final Lexer lexer) {
return new CommonTokenStream( lexer );
}
private DRLParser newParser(final TokenStream tokenStream) {
final DRLParser p = new DRLParser( tokenStream );
return p;
}
}