1 files changed, 54 insertions, 0 deletions
diff --git a/js/src/tests/js1_5/Regress/regress-211590.js b/js/src/tests/js1_5/Regress/regress-211590.js
new file mode 100644
index 000000000..a31bd3bfe
--- /dev/null
+++ b/js/src/tests/js1_5/Regress/regress-211590.js
@@ -0,0 +1,54 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 211590;
+var summary = 'Math.random should be random';
+var actual = '';
+var expect = 'between 47.5% and 52.5%';
+
+printBugNumber(BUGNUMBER);
+printStatus (summary);
+ 
+var r = Math.random;
+var c = Math.pow( 2, 53 );
+
+var n = 10000;
+var odd1 = 0;
+var odd2 = 0;
+
+for ( var i = 0; i < n; ++i )
+{
+  var v= r() * c;
+  if ( v & 1 )
+    ++odd1;
+  if ( v - c + c & 1 )
+    ++odd2;
+}
+
+odd1 *= 100 / n;
+odd2 *= 100 / n;
+
+if (odd1 >= 47.5 && odd1 <= 52.5)
+{
+  actual = expect;
+}
+else
+{
+  actual = ' is ' + odd1.toFixed(3);
+}
+
+reportCompare(expect, actual, summary);
+
+if (odd2 >= 47.5 && odd2 <= 52.5)
+{
+  actual = expect;
+}
+else
+{
+  actual = ' is ' + odd2.toFixed(3);
+}
+
+reportCompare(expect, actual, summary);