testDirectProxyRevoke.js

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load(libdir + "asserts.js");

// Test for various properties demanded of Proxy.revocable

var holder = Proxy.revocable({}, {});

// The returned object must inherit from Object.prototype

assertEq(Object.getPrototypeOf(holder), Object.prototype);

assertDeepEq(Object.getOwnPropertyNames(holder), [ 'proxy', 'revoke' ]);

// The revocation function must inherit from Function.prototype

assertEq(Object.getPrototypeOf(holder.revoke), Function.prototype);

// Proxy.revoke should return unique objects from the same opcode call.

var proxyLog = []

var revokerLog = []

var holderLog = []

function addUnique(l, v)

    assertEq(l.indexOf(v), -1);

    l.push(v);

for (let i = 0; i < 5; i++) {

    holder = Proxy.revocable({}, {});

    addUnique(holderLog, holder);

    addUnique(revokerLog, holder.revoke);

    addUnique(proxyLog, holder.proxy);

// The provided revoke function should revoke only the 1 proxy

var p = proxyLog.pop();

var r = revokerLog.pop();

// Works before, but not after. This is mostly a token. There are

// testDirectProxy* tests to check each trap revokes properly.

p.foo;

assertEq(r(), undefined, "Revoke trap must return undefined");

assertThrowsInstanceOf(() => p.foo, TypeError);

assertEq(r(), undefined, "Revoke trap must return undefined");

// None of this should throw, since these proxies are unrevoked.

for (let i = 0; i < proxyLog.length; i++)

    proxyLog[i].foo;