1 files changed, 49 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Object-getPromiseReactions-02.js b/js/src/jit-test/tests/debug/Object-getPromiseReactions-02.js
new file mode 100644
index 0000000000..9922dd3389
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Object-getPromiseReactions-02.js
@@ -0,0 +1,49 @@
+// Debugger.Object.protoype.getPromiseReactions reports directly resolved promises.
+
+load(libdir + 'array-compare.js');
+
+var g = newGlobal({ newCompartment: true });
+var dbg = new Debugger;
+var DOg = dbg.addDebuggee(g);
+
+g.eval(`
+    var pResolve, pReject;
+    var p = new Promise((resolve, reject) => { pResolve = resolve; pReject = reject });
+    var p2 = new Promise((resolve, reject) => { resolve(p); });
+    var p3 = new Promise((resolve, reject) => { resolve(p); });
+    var p4 = new Promise((resolve, reject) => { resolve(p2); });
+`);
+
+var [DOp, DOp2, DOp3, DOp4] = [g.p, g.p2, g.p3, g.p4].map(p => DOg.makeDebuggeeValue(p));
+
+// Since the standard resolving functions enqueue a job to do the `then` call,
+// none of the reactions should be visible yet.
+assertEq(true, arraysEqual(DOp.getPromiseReactions(), []));
+assertEq(true, arraysEqual(DOp2.getPromiseReactions(), []));
+assertEq(true, arraysEqual(DOp3.getPromiseReactions(), []));
+assertEq(true, arraysEqual(DOp4.getPromiseReactions(), []));
+
+// This should let them all appear in place.
+drainJobQueue();
+
+assertEq(true, arraysEqual(DOp.getPromiseReactions(), [DOp2, DOp3]));
+assertEq(true, arraysEqual(DOp2.getPromiseReactions(), [DOp4]));
+assertEq(true, arraysEqual(DOp3.getPromiseReactions(), []));
+assertEq(true, arraysEqual(DOp4.getPromiseReactions(), []));
+
+// Resolving the initial promise should kick off its reactions, but propagating
+// that the rest of the way requires microtasks.
+g.pResolve(42);
+
+assertEq(true, arraysEqual(DOp.getPromiseReactions(), []));
+assertEq(true, arraysEqual(DOp2.getPromiseReactions(), [DOp4]));
+assertEq(true, arraysEqual(DOp3.getPromiseReactions(), []));
+assertEq(true, arraysEqual(DOp4.getPromiseReactions(), []));
+
+// Let the propagation complete.
+drainJobQueue();
+
+assertEq(true, arraysEqual(DOp.getPromiseReactions(), []));
+assertEq(true, arraysEqual(DOp2.getPromiseReactions(), []));
+assertEq(true, arraysEqual(DOp3.getPromiseReactions(), []));
+assertEq(true, arraysEqual(DOp4.getPromiseReactions(), []));