Test that EmptyArchiveException is thrown when creating archives with no files

This closes #63

Author: plamentotev

src/test/java/org/codehaus/plexus/archiver/tar/TarArchiverTest.java

@@ -38,6 +38,7 @@
 import org.codehaus.plexus.archiver.ArchiverException;
 import org.codehaus.plexus.archiver.UnixStat;
 import org.codehaus.plexus.archiver.bzip2.BZip2Compressor;
+import org.codehaus.plexus.archiver.exceptions.EmptyArchiveException;
 import org.codehaus.plexus.archiver.gzip.GZipCompressor;
 import org.codehaus.plexus.archiver.util.ArchiveEntryUtils;
 import org.codehaus.plexus.archiver.util.Compressor;
@@ -227,6 +228,22 @@ public void testCreateArchiveWithDetectedModes()
         }
     }
 
+    public void testCreateEmptyArchive()
+        throws Exception
+    {
+        TarArchiver archiver = getPosixTarArchiver();
+        archiver.setDestFile( getTestFile( "target/output/empty.tar" ) );
+        try
+        {
+            archiver.createArchive();
+
+            fail( "Creating empty archive should throw EmptyArchiveException" );
+        }
+        catch ( EmptyArchiveException ignore )
+        {
+        }
+    }
+
     public void testUnicode() throws Exception
     {
         File tmpDir = getTestFile( "src/test/resources/utf8" );

src/test/java/org/codehaus/plexus/archiver/zip/ZipArchiverTest.java

@@ -48,6 +48,7 @@
 import org.codehaus.plexus.archiver.BasePlexusArchiverTest;
 import org.codehaus.plexus.archiver.UnArchiver;
 import org.codehaus.plexus.archiver.UnixStat;
+import org.codehaus.plexus.archiver.exceptions.EmptyArchiveException;
 import org.codehaus.plexus.archiver.tar.TarArchiver;
 import org.codehaus.plexus.archiver.tar.TarFile;
 import org.codehaus.plexus.archiver.util.ArchiveEntryUtils;
@@ -284,6 +285,22 @@ public void testCreateArchiveWithDetectedModes()
         }
     }
 
+    public void testCreateEmptyArchive()
+        throws Exception
+    {
+        ZipArchiver archiver = getZipArchiver();
+        archiver.setDestFile( getTestFile( "target/output/empty.zip" ) );
+        try
+        {
+            archiver.createArchive();
+
+            fail( "Creating empty archive should throw EmptyArchiveException" );
+        }
+        catch ( EmptyArchiveException ignore )
+        {
+        }
+    }
+
     private ZipArchiver getZipArchiver()
     {
         try