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// Test proxy traps invoked while doing for-in enumeration over a proxy +
// property deletion. Note that some of this is implementation-defined, but if
// our behavior changes we want to know about it.
// In particular, we should be very careful with proxy traps invoked under
// SuppressDeletedProperty.
let target = {a: 1, b: 2, c: 3, d: 4};
let log = [];
let handler = {
getPrototypeOf: function (t) {
log.push("get-proto");
return Reflect.getPrototypeOf(t);
},
deleteProperty: function (t, prop) {
log.push(`delete: ${prop}`);
return Reflect.deleteProperty(t, prop);
},
getOwnPropertyDescriptor: function (t, prop) {
log.push(`get-desc: ${prop}`);
return Reflect.getOwnPropertyDescriptor(t, prop);
},
ownKeys: function (t) {
log.push("own-keys");
return Reflect.ownKeys(t);
}
};
let proxy = new Proxy(target, handler);
for (let p in proxy) {
log.push(`iter: ${p}`);
delete proxy.d;
}
assertEq(log.join("\n"), [
"own-keys",
"get-desc: a",
"get-desc: b",
"get-desc: c",
"get-desc: d",
"get-proto",
"iter: a",
"delete: d",
"iter: b",
"delete: d",
"iter: c",
"delete: d",
].join("\n"));