diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Debugger-debuggees-04.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Debugger-debuggees-04.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,26 @@
+// hasDebuggee tests.
+
+var g1 = newGlobal(), g1w;
+g1.eval("var g2 = newGlobal('same-compartment')");
+var g2 = g1.g2;
+var g1w, g2w;
+
+var dbg = new Debugger;
+function checkHas(hasg1, hasg2) {
+    assertEq(dbg.hasDebuggee(g1), hasg1);
+    if (typeof g1w === 'object')
+        assertEq(dbg.hasDebuggee(g1w), hasg1);
+    assertEq(dbg.hasDebuggee(g2), hasg2);
+    if (typeof g2w === 'object')
+        assertEq(dbg.hasDebuggee(g2w), hasg2);
+}
+
+checkHas(false, false);
+g1w = dbg.addDebuggee(g1);
+checkHas(true, false);
+g2w = dbg.addDebuggee(g2);
+checkHas(true, true);
+dbg.removeDebuggee(g1w);
+checkHas(false, true);
+dbg.removeDebuggee(g2);
+checkHas(false, false);