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Diffstat (limited to 'js/src/tests/test262/built-ins/Proxy/setPrototypeOf/trap-is-missing-target-is-proxy.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Proxy/setPrototypeOf/trap-is-missing-target-is-proxy.js | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Proxy/setPrototypeOf/trap-is-missing-target-is-proxy.js b/js/src/tests/test262/built-ins/Proxy/setPrototypeOf/trap-is-missing-target-is-proxy.js new file mode 100644 index 0000000000..8a3f56b5cb --- /dev/null +++ b/js/src/tests/test262/built-ins/Proxy/setPrototypeOf/trap-is-missing-target-is-proxy.js @@ -0,0 +1,38 @@ +// 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-setprototypeof-v +description: > + If "setPrototypeOf" trap is null or undefined, [[SetPrototypeOf]] call + is properly forwarded to [[ProxyTarget]] (which is also a Proxy object). +info: | + [[SetPrototypeOf]] ( V ) + + [...] + 5. Let target be O.[[ProxyTarget]]. + 6. Let trap be ? GetMethod(handler, "setPrototypeOf"). + 7. If trap is undefined, then + a. Return ? target.[[SetPrototypeOf]](V). + + [[SetPrototypeOf]] ( V ) + + [...] + 8. Let booleanTrapResult be ! ToBoolean(? Call(trap, handler, « target, V »)). + 9. If booleanTrapResult is false, return false. +features: [Proxy] +---*/ + +var target = new Proxy({}, { + setPrototypeOf: function(_target, _value) { + return false; + }, +}); + +var proxy = new Proxy(target, {}); + +assert.throws(TypeError, function() { + Object.setPrototypeOf(proxy, null); +}); + +reportCompare(0, 0); |