Upload Kmake

deps/v8/test/mjsunit/compiler/promise-species.js

@@ -0,0 +1,31 @@
+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax
+
+class Foo extends Promise {};
+
+function f() {
+  return new Promise(r => 88).then(x => 88);
+}
+
+%PrepareFunctionForOptimization(f);
+
+let y;
+
+y = f();
+assertFalse(y instanceof Foo);
+
+y = f();
+assertFalse(y instanceof Foo);
+
+%OptimizeFunctionOnNextCall(f);
+
+y = f();
+assertFalse(y instanceof Foo);
+
+assertTrue(Reflect.defineProperty(Promise, Symbol.species, {value: Foo}));
+
+y = f();
+assertInstanceof(y, Foo);