groovy/src/test/org/codehaus/groovy/antlr/treewalker/LineColumnTest.java

/**
 *
 * Copyright 2005 Jeremy Rayner
 *
 * 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.codehaus.groovy.antlr.treewalker;

import antlr.collections.AST;
import junit.framework.TestCase;
import org.codehaus.groovy.antlr.AntlrASTProcessor;
import org.codehaus.groovy.antlr.SourceBuffer;
import org.codehaus.groovy.antlr.UnicodeEscapingReader;
import org.codehaus.groovy.antlr.AntlrASTProcessSnippets;
import org.codehaus.groovy.antlr.parser.GroovyLexer;
import org.codehaus.groovy.antlr.parser.GroovyRecognizer;

import java.io.StringReader;

/**
 * Test that will assert each node of Source AST has a correct line/column info
 * given a SourceBuffer
 *
 * @author Jeremy Rayner
 */
public class LineColumnTest extends TestCase {
    public void testSimpleGroovySource() throws Exception {
        doStuff("def foo()\n" +
                "{ print \"Hello World\" }\n" +
                "\n" +
                "foo()");
    }

    public void doStuff(String input) throws Exception {
        GroovyRecognizer parser;
        SourceBuffer sourceBuffer = new SourceBuffer();
        UnicodeEscapingReader unicodeReader = new UnicodeEscapingReader(new StringReader(input), sourceBuffer);
        GroovyLexer lexer = new GroovyLexer(unicodeReader);
        unicodeReader.setLexer(lexer);
        parser = GroovyRecognizer.make(lexer);
        parser.setSourceBuffer(sourceBuffer);
        String[] tokenNames = parser.getTokenNames();
        parser.compilationUnit();
        AST ast = parser.getAST();
        AntlrASTProcessor snippets = new AntlrASTProcessSnippets(sourceBuffer);
        ast = snippets.process(ast);
        Visitor visitor = new LineColumnChecker(sourceBuffer, tokenNames);
        AntlrASTProcessor traverser = new SourceCodeTraversal(visitor);
        traverser.process(ast);
    }
}