    1   /*
    2    $Id: SourceBufferTest.java,v 1.1 2005/06/04 09:39:18 jez Exp $
    3
    4    Copyright 2005 (C) Jeremy Rayner. All Rights Reserved.
    5
    6    Redistribution and use of this software and associated documentation
    7    ("Software"), with or without modification, are permitted provided
    8    that the following conditions are met:
    9
    10   1. Redistributions of source code must retain copyright
    11      statements and notices.  Redistributions must also contain a
    12      copy of this document.
    13
    14   2. Redistributions in binary form must reproduce the
    15      above copyright notice, this list of conditions and the
    16      following disclaimer in the documentation and/or other
    17      materials provided with the distribution.
    18
    19   3. The name "groovy" must not be used to endorse or promote
    20      products derived from this Software without prior written
    21      permission of The Codehaus.  For written permission,
    22      please contact info@codehaus.org.
    23
    24   4. Products derived from this Software may not be called "groovy"
    25      nor may "groovy" appear in their names without prior written
    26      permission of The Codehaus. "groovy" is a registered
    27      trademark of The Codehaus.
    28
    29   5. Due credit should be given to The Codehaus -
    30      http://groovy.codehaus.org/
    31
    32   THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
    33   ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
    34   NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
    35   FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
    36   THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
    37   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
    38   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
    39   SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    40   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
    41   STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    42   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
    43   OF THE POSSIBILITY OF SUCH DAMAGE.
    44
    45   */
    46
    47  package org.codehaus.groovy.antlr;
    48
    49  import groovy.util.GroovyTestCase;
    50
    51  import java.io.Reader;
    52  import java.io.StringReader;
    53
    54  /***
    55   *
    56   * @author <a href="mailto:groovy@ross-rayner.com">Jeremy Rayner</a>
    57   * @version $Revision: 1.1 $
    58   */
    59  public class SourceBufferTest extends GroovyTestCase {
    60
    61      public void testEmptyBuffer() throws Exception {
    62          SourceBuffer buffer = getSourceBuffer("");
    63          assertNull(buffer.getSnippet(new LineColumn(1,1),new LineColumn(1,1)));
    64      }
    65
    66      public void testSimpleUsage() throws Exception {
    67          SourceBuffer buffer = getSourceBuffer("println 'hello world'");
    68          assertEquals("hello",buffer.getSnippet(new LineColumn(1,10),new LineColumn(1,15)));
    69      }
    70
    71      public void testUnixLineUsage() throws Exception {
    72          String endOfLine = "\n";
    73          StringBuffer src = new StringBuffer();
    74          src.append("println 'hello world'").append(endOfLine);
    75          src.append("println 'oh not, not that again'").append(endOfLine);
    76          SourceBuffer buffer = getSourceBuffer(src.toString());
    77          assertEquals("hello",buffer.getSnippet(new LineColumn(1,10),new LineColumn(1,15)));
    78          assertEquals("world'" + endOfLine + "print",buffer.getSnippet(new LineColumn(1,16),new LineColumn(2,6)));
    79          assertEquals(endOfLine,buffer.getSnippet(new LineColumn(1,22),new LineColumn(1,23)));
    80          assertEquals(endOfLine,buffer.getSnippet(new LineColumn(2,33),new LineColumn(2,34)));
    81      }
    82
    83      public void testDOSLineUsage() throws Exception {
    84          String endOfLine = "\r\n";
    85          StringBuffer src = new StringBuffer();
    86          src.append("println 'hello world'").append(endOfLine);
    87          src.append("println 'oh not, not that again'").append(endOfLine);
    88          SourceBuffer buffer = getSourceBuffer(src.toString());
    89          assertEquals("hello",buffer.getSnippet(new LineColumn(1,10),new LineColumn(1,15)));
    90          assertEquals("oh not",buffer.getSnippet(new LineColumn(2,10),new LineColumn(2,16)));
    91          assertEquals("world'" + endOfLine + "print",buffer.getSnippet(new LineColumn(1,16),new LineColumn(2,6)));
    92          assertEquals(endOfLine,buffer.getSnippet(new LineColumn(1,22),new LineColumn(1,24)));
    93          assertEquals(endOfLine,buffer.getSnippet(new LineColumn(2,33),new LineColumn(2,35)));
    94      }
    95
    96      public void testOutOfBounds() throws Exception {
    97          String endOfLine = "\n";
    98          StringBuffer src = new StringBuffer();
    99          src.append("println 'hello world'").append(endOfLine);
    100         src.append("println 'oh not, not that again'").append(endOfLine);
    101         SourceBuffer buffer = getSourceBuffer(src.toString());
    102         assertEquals("println",buffer.getSnippet(new LineColumn(0,0),new LineColumn(1,8)));
    103         assertEquals("println",buffer.getSnippet(new LineColumn(-10,-1),new LineColumn(1,8)));
    104         assertEquals(endOfLine,buffer.getSnippet(new LineColumn(2,33),new LineColumn(2,40)));
    105         assertEquals("",buffer.getSnippet(new LineColumn(3,33),new LineColumn(6,40)));
    106     }
    107
    108     private SourceBuffer getSourceBuffer(String text) throws Exception {
    109         SourceBuffer buffer = new SourceBuffer();
    110         Reader reader = new UnicodeEscapingReader(new StringReader(text),buffer);
    111
    112         while (reader.read() != -1) {
    113             // empty loop
    114             // - read all characters till the end of the reader
    115             // UnicodeEscapingReader has side effects of
    116             // filling the buffer
    117         }
    118         return buffer;
    119     }
    120 }