--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/io/LineNumberInputStream/Available.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 1997, 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.
+ */
+
+/* @test
+   @bug 1238944
+   @summary Check for correct implementation of LineNumberInputStream.available
+   */
+
+import java.io.*;
+
+
+public class Available {
+
+    static void check(int a, int bound) throws Exception {
+        if (a > bound) {
+            throw new Exception("Available returned " + a + " > " + bound);
+        }
+    }
+
+    public static void main(String args[]) throws Exception {
+        LineNumberInputStream in = new LineNumberInputStream(new MyInStream());
+        check(in.available(), 5);
+        in.read();
+        in.read();
+        check(in.available(), 4);
+        in.read();
+        in.read();
+        in.read();
+        check(in.available(), 2);
+    }
+
+}
+
+
+class MyInStream extends InputStream {
+
+    char[] buf = {'a', 'b', 'c', 'd', '\n',
+                  'e', 'f', '\r', '\n', 'g'};
+    int ctr = 0;
+
+    public int read() {
+        return ((ctr == 12) ? -1 : (int)buf[ctr++]);
+    }
+
+    public int available() {
+        return (10 - ctr);
+    }
+
+}