test for locking files

git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/io/trunk@140528 13f79535-47bb-0310-9956-ffa450edef68

Author: hen

src/test/org/apache/commons/io/output/LockableFileWriterTest.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2004 The Apache Software Foundation.
+ * 
+ * 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.apache.commons.io.output;
+
+
+import java.io.IOException;
+
+import junit.framework.TestCase;
+
+/**
+ * Tests that files really lock, although no writing is done as 
+ * the locking is tested only on construction. 
+ *
+ * @author Henri Yandell (bayard at apache dot org)
+ * @version $Revision: 1.1 $ $Date: 2004/02/23 05:49:52 $
+ */
+
+public class LockableFileWriterTest extends TestCase {
+
+    public LockableFileWriterTest(String name) {
+        super(name);
+    }
+
+    public void testFileLocked() throws IOException {
+        LockableFileWriter lfw = new LockableFileWriter("testlockfile");
+        try {
+            LockableFileWriter lfw2 = new LockableFileWriter("testlockfile");
+            fail("Somehow able to open a locked file. ");
+        } catch(IOException ioe) {
+            String msg = ioe.getMessage();
+            assertTrue( "Exception message does not start correctly. ", 
+                        msg.startsWith("Can't write file, lock ") );
+        }
+        lfw.close();
+    }
+
+    public void testFileNotLocked() throws IOException {
+        LockableFileWriter lfw = new LockableFileWriter("testnotlockfile");
+        lfw.close();
+        try {
+            LockableFileWriter lfw2 = new LockableFileWriter("testnotlockfile");
+            lfw2.close();
+        } catch(IOException ioe) {
+            String msg = ioe.getMessage();
+            if( msg.startsWith("Can't write file, lock ") ) {
+                fail("Somehow unable to open a unlocked file. ");
+            }
+        }
+    }
+
+}