Add missing tests as discovered with Cobertura.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/io/trunk@1304170 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

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

@@ -20,6 +20,7 @@
 import java.io.ByteArrayOutputStream;
 import java.io.CharArrayReader;
 import java.io.CharArrayWriter;
+import java.io.Closeable;
 import java.io.EOFException;
 import java.io.File;
 import java.io.FileInputStream;
@@ -31,6 +32,8 @@
 import java.io.InputStreamReader;
 import java.io.Reader;
 import java.io.StringReader;
+import java.net.ServerSocket;
+import java.net.Socket;
 import java.net.URI;
 import java.net.URL;
 import java.nio.channels.Selector;
@@ -109,6 +112,40 @@ public void testCloseQuietlyNullSelector() {
         IOUtils.closeQuietly(selector);
     }
 
+    public void testCloseableCloseQuietlyOnException() {
+        IOUtils.closeQuietly(new Closeable() {            
+            public void close() throws IOException {
+                throw new IOException();
+            }
+        });
+    }
+
+    public void testSocketCloseQuietlyOnException() {
+        IOUtils.closeQuietly(new Socket() {            
+            public void close() throws IOException {
+                throw new IOException();
+            }
+        });
+    }
+
+    public void testServerSocketCloseQuietlyOnException() throws IOException {
+        IOUtils.closeQuietly(new ServerSocket() {            
+            public void close() throws IOException {
+                throw new IOException();
+            }
+        });
+    }
+
+    public void testSocketCloseQuietly() {
+        IOUtils.closeQuietly((Socket) null);
+        IOUtils.closeQuietly(new Socket());
+    }
+
+    public void testServerSocketCloseQuietly() throws IOException {
+        IOUtils.closeQuietly((ServerSocket) null);
+        IOUtils.closeQuietly(new ServerSocket());
+    }
+
     public void testCloseQuietlySelector() {
         Selector selector = null;
         try {