Test revoked [[ProxyHandler]]

test/built-ins/Proxy/revocable/handler-is-revoked-proxy.js

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+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-proxycreate
+description: >
+  A Proxy is created with its [[ProxyHandler]] as revoked Proxy.
+info: |
+  ProxyCreate ( target, handler )
+
+  [...]
+  3. Let P be ! MakeBasicObject(« [[ProxyHandler]], [[ProxyTarget]] »).
+  [...]
+  7. Set P.[[ProxyHandler]] to handler.
+  8. Return P.
+features: [Proxy]
+---*/
+
+var revocableHandler = Proxy.revocable({}, {});
+revocableHandler.revoke();
+
+var revocable = Proxy.revocable({}, revocableHandler.proxy);
+assert.sameValue(typeof revocable.proxy, "object");