1 files changed, 62 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/onEnterFrame-async-resumption-07.js b/js/src/jit-test/tests/debug/onEnterFrame-async-resumption-07.js
new file mode 100644
index 0000000000..578d93ff99
--- /dev/null
+++ b/js/src/jit-test/tests/debug/onEnterFrame-async-resumption-07.js
@@ -0,0 +1,62 @@
+// A Debugger can't force-return from the first onEnterFrame for an async generator.
+
+ignoreUnhandledRejections();
+
+let g = newGlobal({newCompartment: true});
+g.eval(`async function* f(x) { await x; return "ponies"; }`);
+
+let dbg = new Debugger;
+dbg.uncaughtExceptionHook = exc => {}; // ignore errors
+let gw = dbg.addDebuggee(g);
+let hits = 0;
+let resumption = undefined;
+
+dbg.onEnterFrame = frame => {
+    dbg.onEnterFrame = undefined;
+    assertEq(frame.type, "call");
+    assertEq(frame.callee.name, "f");
+    frame.onPop = completion => {
+        hits++;
+    };
+
+    // Try to force-return. It's too early. This results in a call to the
+    // uncaughtExceptionHook but is otherwise ignored.
+    return {return: "rainbows"};
+};
+let it = g.f(0);    // onPop #1: the initial yield
+assertEq(hits, 1);
+let p = it.next();  // onPop #2: await x
+assertEq(hits, 2);
+drainJobQueue();    // onPop #3: return "ponies", #4: the final yield
+assertEq(hits, 4);
+
+let pw = gw.makeDebuggeeValue(p);
+assertEq(pw.isPromise, true);
+assertEq(pw.promiseState, "fulfilled");
+assertEq(pw.promiseValue.getProperty("value").return, "ponies");
+assertEq(pw.promiseValue.getProperty("done").return, true);
+
+// ----
+
+g.eval(`async function* f2(x) { await x; return "moar ponies"; }`);
+
+let savedAsyncGen = undefined;
+dbg.onEnterFrame = frame => {
+    dbg.onEnterFrame = undefined;
+    assertEq(frame.type, "call");
+    assertEq(frame.callee.name, "f2");
+    frame.onPop = completion => {
+        if (savedAsyncGen === undefined) {
+            savedAsyncGen = completion.return;
+        }
+    };
+};
+let it2 = g.f2(123);
+let p2 = it2.next();
+drainJobQueue();
+
+let pw2 = gw.makeDebuggeeValue(p2);
+assertEq(pw2.isPromise, true);
+assertEq(pw2.promiseState, "fulfilled");
+assertEq(pw2.promiseValue.getProperty("value").return, "moar ponies");
+assertEq(pw2.promiseValue.getProperty("done").return, true);