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38 lines
1.4 KiB
38 lines
1.4 KiB
8 years ago
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'use strict';
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require('../common');
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const assert = require('assert');
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const vm = require('vm');
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// This, admittedly contrived, example tests an edge cases of the vm module.
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//
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// The GetterCallback explicitly checks the global_proxy() if a property is
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// not found on the sandbox. In the following test, the explicit check
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// inside the callback yields different results than deferring the
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// check until after the callback. The check is deferred if the
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// callback does not intercept, i.e., if args.GetReturnValue().Set() is
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// not called.
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// Check that the GetterCallback explicitly calls GetRealNamedProperty()
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// on the global proxy if the property is not found on the sandbox.
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//
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// foo is not defined on the sandbox until we call CopyProperties().
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// In the GetterCallback, we do not find the property on the sandbox and
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// get the property from the global proxy. Since the return value is
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// the sandbox, we replace it by
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// the global_proxy to keep the correct identities.
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//
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// This test case is partially inspired by
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// https://github.com/nodejs/node/issues/855
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const sandbox = {console};
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sandbox.document = {defaultView: sandbox};
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vm.createContext(sandbox);
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const code = `Object.defineProperty(
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this,
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'foo',
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{ get: function() {return document.defaultView} }
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);
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var result = foo === this;`;
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vm.runInContext(code, sandbox);
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assert.strictEqual(sandbox.result, true);
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