diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Debugger-enabled-01.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Debugger-enabled-01.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,18 @@
+var desc = Object.getOwnPropertyDescriptor(Debugger.prototype, "enabled");
+assertEq(typeof desc.get, 'function');
+assertEq(typeof desc.set, 'function');
+
+var g = newGlobal();
+var hits;
+var dbg = new Debugger(g);
+assertEq(dbg.enabled, true);
+dbg.onDebuggerStatement = function () { hits++; };
+
+var vals = [true, false, null, undefined, NaN, "blah", {}];
+for (var i = 0; i < vals.length; i++) {
+    dbg.enabled = vals[i];
+    assertEq(dbg.enabled, !!vals[i]);
+    hits = 0;
+    g.eval("debugger;");
+    assertEq(hits, vals[i] ? 1 : 0);
+}