1 files changed, 46 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Proxy/has/trap-is-null-target-is-proxy.js b/js/src/tests/test262/built-ins/Proxy/has/trap-is-null-target-is-proxy.js
new file mode 100644
index 0000000000..72b4443c95
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Proxy/has/trap-is-null-target-is-proxy.js
@@ -0,0 +1,46 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-proxy-object-internal-methods-and-internal-slots-hasproperty-p
+description: >
+  If "has" trap is null or undefined, [[HasProperty]] call is properly
+  forwarded to [[ProxyTarget]] (which is also a Proxy object).
+info: |
+  [[HasProperty]] ( P )
+
+  [...]
+  5. Let target be O.[[ProxyTarget]].
+  6. Let trap be ? GetMethod(handler, "has").
+  7. If trap is undefined, then
+    a. Return ? target.[[HasProperty]](P).
+features: [Proxy, Symbol, Reflect, Array.prototype.includes]
+---*/
+
+var stringTarget = new Proxy(new String("str"), {});
+var stringProxy = new Proxy(stringTarget, {
+  get: null,
+});
+
+assert(Reflect.has(stringProxy, "length"));
+assert(0 in stringProxy);
+assert(!(4 in stringProxy));
+
+
+var sym = Symbol();
+var target = new Proxy({}, {
+  has: function(_target, key) {
+    return [sym, "6", "foo"].includes(key);
+  },
+});
+
+var proxy = new Proxy(target, {
+  get: null,
+});
+
+assert(Reflect.has(proxy, sym));
+assert("6" in proxy);
+assert("foo" in Object.create(proxy));
+assert(!("bar" in proxy));
+
+reportCompare(0, 0);