diff -r 484248c9c1d6 -r 9830c8b761ce rt/vm/src/test/java/org/apidesign/vm4brwsr/MathTest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rt/vm/src/test/java/org/apidesign/vm4brwsr/MathTest.java	Tue Jan 20 13:01:31 2015 +0100
@@ -0,0 +1,115 @@
+/**
+ * Back 2 Browser Bytecode Translator
+ * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 2 of the License.
+ *
+ * This program 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. Look for COPYING file in the top folder.
+ * If not, see http://opensource.org/licenses/GPL-2.0.
+ */
+package org.apidesign.vm4brwsr;
+
+import org.testng.annotations.AfterClass;
+import org.testng.annotations.BeforeClass;
+import org.testng.annotations.Test;
+
+/** Checks behavior on Math class.
+ *
+ * @author Jaroslav Tulach <jtulach@netbeans.org>
+ */
+public class MathTest {
+    @Test public void rintNegativeUp() throws Exception {
+        final double cnts = -453904.634;
+        assertExec("Should round up to end with 5", mathClass(), "rint__DD", 
+            -453905.0, cnts
+        );
+    }
+
+    protected Class<?> mathClass() {
+        return Math.class;
+    }
+
+    @Test public void rintNegativeDown() throws Exception {
+        final double cnts = -453904.434;
+        assertExec("Should round up to end with 4", mathClass(), "rint__DD", 
+            -453904.0, cnts
+        );
+    }
+
+    @Test public void rintPositiveUp() throws Exception {
+        final double cnts = 453904.634;
+        assertExec("Should round up to end with 5", mathClass(), "rint__DD", 
+            453905.0, cnts
+        );
+    }
+    @Test public void rintPositiveDown() throws Exception {
+        final double cnts = 453904.434;
+        assertExec("Should round up to end with 4", mathClass(), "rint__DD", 
+            453904.0, cnts
+        );
+    }
+    @Test public void rintOneHalf() throws Exception {
+        final double cnts = 1.5;
+        assertExec("Should round up to end with 2", mathClass(), "rint__DD", 
+            2.0, cnts
+        );
+    }
+    @Test public void rintNegativeOneHalf() throws Exception {
+        final double cnts = -1.5;
+        assertExec("Should round up to end with 2", mathClass(), "rint__DD", 
+            -2.0, cnts
+        );
+    }
+    @Test public void rintTwoAndHalf() throws Exception {
+        final double cnts = 2.5;
+        assertExec("Should round up to end with 2", mathClass(), "rint__DD", 
+            2.0, cnts
+        );
+    }
+    @Test public void rintNegativeTwoOneHalf() throws Exception {
+        final double cnts = -2.5;
+        assertExec("Should round up to end with 2", mathClass(), "rint__DD", 
+            -2.0, cnts
+        );
+    }
+
+    @Test public void ieeeReminder1() throws Exception {
+        assertExec("Same result 1", mathClass(), "IEEEremainder__DDD", 
+            Math.IEEEremainder(10.0, 4.5), 10.0, 4.5
+        );
+    }
+
+    @Test public void ieeeReminder2() throws Exception {
+        assertExec("Same result 1", mathClass(), "IEEEremainder__DDD", 
+            Math.IEEEremainder(Integer.MAX_VALUE, -4.5), Integer.MAX_VALUE, -4.5
+        );
+    }
+
+    private static TestVM code;
+    
+    @BeforeClass 
+    public static void compileTheCode() throws Exception {
+        StringBuilder sb = new StringBuilder();
+        code = TestVM.compileClass(sb);
+    }
+    @AfterClass
+    public static void releaseTheCode() {
+        code = null;
+    }
+
+    private void assertExec(
+        String msg, Class<?> clazz, String method, 
+        Object ret, Object... args
+    ) throws Exception {
+        code.assertExec(msg, clazz, method, ret, args);
+    }
+    
+}