--- /dev/null	2018-07-31 11:37:01.000000000 +0800
+++ new/test/jdk/com/sun/jndi/dns/ListTests/ListTestBase.java	2018-07-31 11:37:01.000000000 +0800
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import javax.naming.directory.InitialDirContext;
+import java.util.Hashtable;
+
+// This test base will also been referenced outside of current open test folder,
+// please double check all usages when modify this
+public abstract class ListTestBase extends DNSTestBase {
+    private String key;
+    private String[] children;
+
+    public ListTestBase() {
+        // set default test data
+        setKey("subdomain");
+        setChildren(new String[] { "host1", "host2", "host3", "host4", "host5",
+                "host6", "host7", "host8", "host9", });
+    }
+
+    public void initContext() throws Exception {
+        setContext(new InitialDirContext(env()));
+    }
+
+    public void verifyEntries(Hashtable<?, ?> entries) {
+        if (entries.size() != children.length) {
+            throw new RuntimeException(
+                    "Failed: expecting " + children.length + " entries but got "
+                            + entries.size());
+        } else {
+            for (String child : children) {
+                if (entries.get(child.toLowerCase()) == null) {
+                    throw new RuntimeException("Failed: missing " + child);
+                }
+            }
+        }
+    }
+
+    public String getKey() {
+        return key;
+    }
+
+    public void setKey(String key) {
+        this.key = key;
+    }
+
+    public String[] getChildren() {
+        return children;
+    }
+
+    public void setChildren(String[] children) {
+        this.children = children;
+    }
+}