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Diffstat (limited to 'js/src/tests/test262/built-ins/Proxy/deleteProperty/trap-is-undefined-target-is-proxy.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Proxy/deleteProperty/trap-is-undefined-target-is-proxy.js | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Proxy/deleteProperty/trap-is-undefined-target-is-proxy.js b/js/src/tests/test262/built-ins/Proxy/deleteProperty/trap-is-undefined-target-is-proxy.js new file mode 100644 index 0000000000..2195deca63 --- /dev/null +++ b/js/src/tests/test262/built-ins/Proxy/deleteProperty/trap-is-undefined-target-is-proxy.js @@ -0,0 +1,54 @@ +// 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-delete-p +description: > + If "deleteProperty" trap is null or undefined, [[Delete]] call is + properly forwarded to [[ProxyTarget]] (which is also a Proxy object). +info: | + [[Delete]] ( P ) + + [...] + 5. Let target be O.[[ProxyTarget]]. + 6. Let trap be ? GetMethod(handler, "deleteProperty"). + 7. If trap is undefined, then + a. Return ? target.[[Delete]](P). +features: [Proxy, Reflect] +---*/ + +var array = [1]; +var arrayTarget = new Proxy(array, {}); +var arrayProxy = new Proxy(arrayTarget, { + deleteProperty: undefined, +}); + +assert(delete arrayProxy[0]); +assert(!array.hasOwnProperty("0")); + +assert(!Reflect.deleteProperty(arrayProxy, "length")); +assert.sameValue(array.length, 1); + + +var trapCalls = 0; +var target = new Proxy({}, { + deleteProperty: function(_target, key) { + trapCalls++; + return key === "foo"; + }, +}); + +var proxy = new Proxy(target, { + deleteProperty: undefined, +}); + +assert(delete proxy.foo); +assert.sameValue(trapCalls, 1); + +assert.throws(TypeError, function() { + "use strict"; + delete proxy.bar; +}); +assert.sameValue(trapCalls, 2); + +reportCompare(0, 0); |