Add unit test assertion messages.

Author: garydgregory

commons-vfs2/src/test/java/org/apache/commons/vfs2/test/ProviderWriteTests.java

@@ -19,6 +19,7 @@
 import java.io.OutputStream;
 import java.util.ArrayList;
 import java.util.HashSet;
+import java.util.Objects;
 import java.util.Set;
 
 import org.apache.commons.vfs2.Capability;
@@ -594,9 +595,9 @@ public TestListener(final FileObject file) {
         public void fileCreated(final FileChangeEvent event) {
             assertTrue("Unexpected create event", events.size() > 0);
             assertSame("Expecting a create event", CREATE, events.remove(0));
-            assertEquals(file, event.getFileObject());
+            assertEquals(Objects.toString(file), file, event.getFileObject());
             try {
-                assertTrue(file.exists());
+                assertTrue(Objects.toString(file), file.exists());
             } catch (final FileSystemException e) {
                 fail();
             }
@@ -609,9 +610,9 @@ public void fileCreated(final FileChangeEvent event) {
         public void fileDeleted(final FileChangeEvent event) {
             assertTrue("Unexpected delete event", events.size() > 0);
             assertSame("Expecting a delete event", DELETE, events.remove(0));
-            assertEquals(file, event.getFileObject());
+            assertEquals(Objects.toString(file), file, event.getFileObject());
             try {
-                assertFalse(file.exists());
+                assertFalse(Objects.toString(file), file.exists());
             } catch (final FileSystemException e) {
                 fail();
             }
@@ -621,9 +622,9 @@ public void fileDeleted(final FileChangeEvent event) {
         public void fileChanged(final FileChangeEvent event) throws Exception {
             assertTrue("Unexpected changed event", events.size() > 0);
             assertSame("Expecting a changed event", CHANGED, events.remove(0));
-            assertEquals(file, event.getFileObject());
+            assertEquals(Objects.toString(file), file, event.getFileObject());
             try {
-                assertFalse(file.exists());
+                assertFalse(Objects.toString(file), file.exists());
             } catch (final FileSystemException e) {
                 fail();
             }