Bug #29821

Bugfix for FileUtils.touch(). An existings file was overwritten. With new testcase.
Submitted by:	Christoffer Hammarstr�m <kreiger.at.linuxgods.com>


git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/io/trunk@140585 13f79535-47bb-0310-9956-ffa450edef68

Author: jmaerki

src/java/org/apache/commons/io/FileUtils.java

@@ -64,7 +64,7 @@
  * @author <a href="mailto:jefft@apache.org">Jeff Turner</a>
  * @author Matthew Hawthorne
  * @author <a href="mailto:jeremias@apache.org">Jeremias Maerki</a>
- * @version $Id: FileUtils.java,v 1.32 2004/06/13 04:58:07 bayard Exp $
+ * @version $Id: FileUtils.java,v 1.33 2004/07/03 11:20:45 jeremias Exp $
  */
 public class FileUtils {
 
@@ -121,8 +121,9 @@ public static String byteCountToDisplaySize(long size) {
      * @throws IOException If an I/O problem occurs
      */
     public static void touch(File file) throws IOException {
-        OutputStream out = new java.io.FileOutputStream(file);
+        OutputStream out = new java.io.FileOutputStream(file, true);
         IOUtils.closeQuietly(out);
+        file.setLastModified(System.currentTimeMillis());
     }
 
 

src/test/org/apache/commons/io/FileUtilsTestCase.java

@@ -15,10 +15,7 @@
  */
 package org.apache.commons.io;
 
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.IOException;
-import java.io.OutputStream;
+import java.io.*;
 import java.net.URL;
 
 import org.apache.commons.io.testtools.FileBasedTestCase;
@@ -32,7 +29,7 @@
  *
  * @author Peter Donald
  * @author Matthew Hawthorne
- * @version $Id: FileUtilsTestCase.java,v 1.18 2004/04/23 22:47:39 jeremias Exp $
+ * @version $Id: FileUtilsTestCase.java,v 1.19 2004/07/03 11:20:45 jeremias Exp $
  * @see FileUtils
  */
 public class FileUtilsTestCase extends FileBasedTestCase {
@@ -450,4 +447,20 @@ public void testFileUtils() throws Exception {
 
     }
 
+    public void testTouch() throws IOException {
+        File file = new File(getTestDirectory(), "touch.txt") ;
+        FileUtils.touch(file);
+        assertTrue("FileUtils.touch() created file.", file.exists());
+        FileOutputStream out = new FileOutputStream(file) ;
+        assertEquals("Created empty file.", 0, file.length());
+        out.write(0) ;
+        out.close();
+        assertEquals("Wrote one byte to file.", 1, file.length());
+        file.setLastModified(0) ;
+        assertEquals("Set lastModified to 0.", 0, file.lastModified());
+        FileUtils.touch(file) ;
+        assertEquals("FileUtils.touch() didn't empty the file.", 1, file.length());
+        assertFalse("FileUtils.touch() changed lastModified.", 0 == file.lastModified()) ;        
+    }
+
 }