1 files changed, 83 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Frame-environment-07.js b/js/src/jit-test/tests/debug/Frame-environment-07.js
new file mode 100644
index 0000000000..5e51ba79af
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Frame-environment-07.js
@@ -0,0 +1,83 @@
+// Test that Debugger.Frame.prototype.environment works on suspended generators.
+
+load(libdir + "asserts.js");
+
+const g = newGlobal({ newCompartment: true });
+const dbg = new Debugger(g);
+
+g.eval(`
+function* f() {
+  var value = 42;
+  yield;
+  {
+    let block = "block";
+    yield;
+  }
+  for (let loop of ["loop"]) {
+    yield;
+  }
+  try {
+    throw "err";
+  } catch (err) {
+    yield;
+  }
+  return value;
+}
+`);
+
+let frame;
+dbg.onEnterFrame = f => {
+  frame = f;
+  dbg.onEnterFrame = undefined;
+};
+
+const it = g.f();
+
+assertEq(!!frame, true);
+
+let result = it.next();
+
+assertEq(result.done, false);
+assertEq(result.value, undefined);
+
+assertEq(
+  JSON.stringify(frame.environment.names()),
+  JSON.stringify(["arguments", "value"])
+);
+
+assertEq(frame.environment.getVariable("value"), 42);
+
+frame.environment.setVariable("value", 43);
+
+assertEq(frame.environment.getVariable("value"), 43);
+
+result = it.next();
+
+assertEq(
+  JSON.stringify(frame.environment.names()),
+  JSON.stringify(["block"])
+);
+assertEq(frame.environment.getVariable("block"), "block");
+
+result = it.next();
+
+assertEq(
+  JSON.stringify(frame.environment.names()),
+  JSON.stringify(["loop"])
+);
+assertEq(frame.environment.getVariable("loop"), "loop");
+
+result = it.next();
+
+assertEq(
+  JSON.stringify(frame.environment.names()),
+  JSON.stringify(["err"])
+);
+assertEq(frame.environment.getVariable("err"), "err");
+
+result = it.next();
+
+assertEq(result.done, true);
+assertEq(result.value, 43);
+
+assertThrowsInstanceOf(() => frame.environment, Error);