1 files changed, 25 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Object-getPromiseReactions-01.js b/js/src/jit-test/tests/debug/Object-getPromiseReactions-01.js
new file mode 100644
index 0000000000..ab56984960
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Object-getPromiseReactions-01.js
@@ -0,0 +1,25 @@
+// Debugger.Object.prototype.getPromiseReactions throws on non-promises, but
+// works on wrappers of promises.
+
+load(libdir + 'asserts.js');
+load(libdir + 'array-compare.js');
+
+var g = newGlobal({ newCompartment: true });
+var dbg = new Debugger;
+var DOg = dbg.addDebuggee(g);
+
+assertThrowsInstanceOf(() => DOg.getPromiseReactions(), TypeError);
+
+// Try retrieving an empty reaction list from an actual promise.
+g.eval(`var p = Promise.resolve();`);
+var DOgp = DOg.makeDebuggeeValue(g.p);
+assertEq(true, arraysEqual(DOgp.getPromiseReactions(), []));
+
+// Try a Debugger.Object of a cross-compartment wrapper of a promise. This
+// should still work: the promise accessors generally do checked unwraps of
+// their arguments.
+var g2 = newGlobal({ newCompartment: true });
+DOg2 = dbg.addDebuggee(g2);
+var DOg2gp = DOg2.makeDebuggeeValue(g.p);
+assertEq(DOgp, DOg2gp.unwrap());
+assertEq(true, arraysEqual(DOg2gp.getPromiseReactions(), []));