diff -r f36b3c273de6 -r 4ff4e27465e0 vm/src/test/java/org/apidesign/vm4brwsr/StaticMethodTest.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/StaticMethodTest.java	Wed Dec 12 09:09:42 2012 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/StaticMethodTest.java	Mon Jan 28 16:26:52 2013 +0100
@@ -78,6 +78,73 @@
             3.0d, 1l
         );
     }
+    
+    @Test public void rintNegativeUp() throws Exception {
+        final double cnts = -453904.634;
+        assertExec(
+            "Should round up to end with 5",
+            Math.class, "rint__DD", 
+            -453905.0, cnts
+        );
+    }
+
+    @Test public void rintNegativeDown() throws Exception {
+        final double cnts = -453904.434;
+        assertExec(
+            "Should round up to end with 4",
+            Math.class, "rint__DD", 
+            -453904.0, cnts
+        );
+    }
+
+    @Test public void rintPositiveUp() throws Exception {
+        final double cnts = 453904.634;
+        assertExec(
+            "Should round up to end with 5",
+            Math.class, "rint__DD", 
+            453905.0, cnts
+        );
+    }
+    @Test public void rintPositiveDown() throws Exception {
+        final double cnts = 453904.434;
+        assertExec(
+            "Should round up to end with 4",
+            Math.class, "rint__DD", 
+            453904.0, cnts
+        );
+    }
+    @Test public void rintOneHalf() throws Exception {
+        final double cnts = 1.5;
+        assertExec(
+            "Should round up to end with 2",
+            Math.class, "rint__DD", 
+            2.0, cnts
+        );
+    }
+    @Test public void rintNegativeOneHalf() throws Exception {
+        final double cnts = -1.5;
+        assertExec(
+            "Should round up to end with 2",
+            Math.class, "rint__DD", 
+            -2.0, cnts
+        );
+    }
+    @Test public void rintTwoAndHalf() throws Exception {
+        final double cnts = 2.5;
+        assertExec(
+            "Should round up to end with 2",
+            Math.class, "rint__DD", 
+            2.0, cnts
+        );
+    }
+    @Test public void rintNegativeTwoOneHalf() throws Exception {
+        final double cnts = -2.5;
+        assertExec(
+            "Should round up to end with 2",
+            Math.class, "rint__DD", 
+            -2.0, cnts
+        );
+    }
 
     @Test public void divAndRound() throws Exception {
         assertExec(