/*
* 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.codehaus.groovy.antlr;
import groovy.util.GroovyTestCase;
import java.io.Reader;
import java.io.StringReader;
/**
* @author <a href="mailto:groovy@ross-rayner.com">Jeremy Rayner</a>
*/
public class SourceBufferTest extends GroovyTestCase {
public void testEmptyBuffer() throws Exception {
SourceBuffer buffer = getSourceBuffer("");
assertNull(buffer.getSnippet(new LineColumn(1, 1), new LineColumn(1, 1)));
}
public void testSimpleUsage() throws Exception {
SourceBuffer buffer = getSourceBuffer("println 'hello world'");
assertEquals("hello", buffer.getSnippet(new LineColumn(1, 10), new LineColumn(1, 15)));
}
public void testUnixLineUsage() throws Exception {
String endOfLine = "\n";
StringBuffer src = new StringBuffer();
src.append("println 'hello world'").append(endOfLine);
src.append("println 'oh not, not that again'").append(endOfLine);
SourceBuffer buffer = getSourceBuffer(src.toString());
assertEquals("hello", buffer.getSnippet(new LineColumn(1, 10), new LineColumn(1, 15)));
assertEquals("world'" + endOfLine + "print", buffer.getSnippet(new LineColumn(1, 16), new LineColumn(2, 6)));
assertEquals(endOfLine, buffer.getSnippet(new LineColumn(1, 22), new LineColumn(1, 23)));
assertEquals(endOfLine, buffer.getSnippet(new LineColumn(2, 33), new LineColumn(2, 34)));
}
public void testDOSLineUsage() throws Exception {
String endOfLine = "\r\n";
StringBuffer src = new StringBuffer();
src.append("println 'hello world'").append(endOfLine);
src.append("println 'oh not, not that again'").append(endOfLine);
SourceBuffer buffer = getSourceBuffer(src.toString());
assertEquals("hello", buffer.getSnippet(new LineColumn(1, 10), new LineColumn(1, 15)));
assertEquals("oh not", buffer.getSnippet(new LineColumn(2, 10), new LineColumn(2, 16)));
assertEquals("world'" + endOfLine + "print", buffer.getSnippet(new LineColumn(1, 16), new LineColumn(2, 6)));
assertEquals(endOfLine, buffer.getSnippet(new LineColumn(1, 22), new LineColumn(1, 24)));
assertEquals(endOfLine, buffer.getSnippet(new LineColumn(2, 33), new LineColumn(2, 35)));
}
public void testOutOfBounds() throws Exception {
String endOfLine = "\n";
StringBuffer src = new StringBuffer();
src.append("println 'hello world'").append(endOfLine);
src.append("println 'oh not, not that again'").append(endOfLine);
SourceBuffer buffer = getSourceBuffer(src.toString());
assertEquals("println", buffer.getSnippet(new LineColumn(0, 0), new LineColumn(1, 8)));
assertEquals("println", buffer.getSnippet(new LineColumn(-10, -1), new LineColumn(1, 8)));
assertEquals(endOfLine, buffer.getSnippet(new LineColumn(2, 33), new LineColumn(2, 40)));
assertEquals("", buffer.getSnippet(new LineColumn(3, 33), new LineColumn(6, 40)));
}
private SourceBuffer getSourceBuffer(String text) throws Exception {
SourceBuffer buffer = new SourceBuffer();
Reader reader = new UnicodeEscapingReader(new StringReader(text), buffer);
while (reader.read() != -1) {
// empty loop
// - read all characters till the end of the reader
// UnicodeEscapingReader has side effects of
// filling the buffer
}
return buffer;
}
}