update dart:math

test/codegen/lib/math/low_test.dart

Index: test/codegen/lib/math/low_test.dart
diff --git a/test/codegen/lib/math/low_test.dart b/test/codegen/lib/math/low_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..31f0e8a8f69db32f4d2e64ee658f22d0089da2cd
--- /dev/null
+++ b/test/codegen/lib/math/low_test.dart
@@ -0,0 +1,34 @@
+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// Test that the default PRNG does uniformly distribute values when not using
+// a power of 2.
+
+// Library tag to allow Dartium to run the test.
+library low_test;
+
+import "package:expect/expect.dart";
+import 'dart:math';
+
+void main() {
+  var n = (2 * (1<<32)) ~/ 3;
+  var n2 = n ~/ 2;
+  
+  var iterations = 200000;
+
+  var seed = new Random().nextInt(1<<16);
+  print("low_test seed: $seed");
+  var prng = new Random(seed);
+
+  var low = 0;
+  for (var i = 0; i < iterations; i++) {
+    if (prng.nextInt(n) < n2) {
+      low++;
+    }
+  }
+  
+  var diff = (low - (iterations ~/ 2)).abs();
+  print("$low, $diff");
+  Expect.isTrue(diff < (iterations ~/ 20)); 
+}