new test, mainly to debug error on Windows

src/tests/junit/org/apache/tools/ant/types/selectors/OwnedBySelectorTest.java

@@ -0,0 +1,49 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You 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.tools.ant.types.selectors;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.io.File;
+import java.nio.file.Files;
+import java.nio.file.attribute.UserPrincipal;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+
+public class OwnedBySelectorTest {
+
+    @Rule
+    public TemporaryFolder folder = new TemporaryFolder();
+
+    @Test
+    public void ownedByIsTrueForSelf() throws Exception {
+        String self = System.getProperty("user.name");
+        File file = folder.newFile("f.txt");
+        UserPrincipal user = Files.getOwner(file.toPath());
+        assertEquals(self, user.getName());
+
+        OwnedBySelector s = new OwnedBySelector();
+        s.setOwner(self);
+        assertTrue(s.isSelected(null, null, file));
+    }
+
+}