--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/nio/charset/coders/FullRead.java	Wed Jan 27 19:39:55 2010 -0800
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/* @test
+ * @summary Ensure that InputStreamReader reads as many characters as possible
+ */
+
+// InputStreamReader is not required by its spec to read as many characters as
+// possible upon each invocation of read(char[], int, int), but many programs
+// (e.g., javac) depend upon this behavior.
+
+import java.io.*;
+
+
+public class FullRead {
+
+    static int MAX_LEN = 1 << 16;
+
+    static void test(File f, int len) throws Exception {
+        FileOutputStream fo = new FileOutputStream(f);
+        for (int i = 0; i < len; i++)
+            fo.write('x');
+        fo.close();
+
+        FileInputStream fi = new FileInputStream(f);
+        Reader rd = new InputStreamReader(fi, "US-ASCII");
+        char[] cb = new char[MAX_LEN + 100];
+        int n = rd.read(cb, 0, cb.length);
+        System.out.println(len + " : " + n);
+        if (len != n)
+            throw new Exception("Expected " + len + ", read " + n);
+    }
+
+    public static void main(String[] args) throws Exception {
+        File f = File.createTempFile("foo", "bar");
+        f.deleteOnExit();
+        System.out.println(f);
+
+        for (int i = 4; i <= MAX_LEN; i <<= 1)
+            test(f, i);
+    }
+
+}