8135000: Number.prototype.toFixed returns wrong string for 0.5 and -0.5

Reviewed-by: attila, sundar

nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/objects/NativeNumber.java

@@ -33,6 +33,7 @@ import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
 import java.lang.invoke.MethodType;
+import java.math.RoundingMode;
 import java.text.NumberFormat;
 import java.util.Locale;
 import jdk.internal.dynalink.linker.GuardedInvocation;
@@ -187,6 +188,7 @@ public final class NativeNumber extends ScriptObject {
         format.setMinimumFractionDigits(fractionDigits);
         format.setMaximumFractionDigits(fractionDigits);
         format.setGroupingUsed(false);
+        format.setRoundingMode(RoundingMode.HALF_UP);
 
         return format.format(x);
     }

nashorn/test/script/basic/JDK-8135000.js

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2015, 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.
+ */
+
+/**
+ * JDK-8135000: Number.prototype.toFixed returns wrong string for 0.5 and -0.5
+ *
+ * @test
+ * @run
+ */
+
+print(-2.6.toFixed());
+print(-2.5.toFixed());
+print(-2.4.toFixed());
+print(-1.6.toFixed());
+print(-1.5.toFixed());
+print(-1.4.toFixed());
+print(-0.6.toFixed());
+print(-0.5.toFixed());
+print(-0.4.toFixed());
+print(0.4.toFixed());
+print(0.5.toFixed());
+print(0.6.toFixed());
+print(1.4.toFixed());
+print(1.5.toFixed());
+print(1.6.toFixed());
+print(2.4.toFixed());
+print(2.5.toFixed());
+print(2.6.toFixed());

nashorn/test/script/basic/JDK-8135000.js.EXPECTED

@@ -0,0 +1,18 @@
+-3
+-3
+-2
+-2
+-2
+-1
+-1
+-1
+0
+0
+1
+1
+1
+2
+2
+2
+3
+3