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let primitives = [
10,
false,
"test",
Symbol()
]
let getter = "getter";
let getter2 = "getter2";
let key = "key";
for (let value of primitives) {
let prototype = Object.getPrototypeOf(value);
// Strict getters receive a primitive this value.
Object.defineProperty(prototype, "getter", {get: function() {
"use strict";
assertEq(this, value);
return "getter";
}})
assertEq(value.getter, "getter");
assertEq(value[getter], "getter");
// The proxy's [[Get]] trap is also invoked with primitive receiver values.
let proxy = new Proxy({}, {
get(target, property, receiver) {
assertEq(property, "key");
assertEq(receiver, value);
return "get";
}
});
Object.setPrototypeOf(prototype, proxy);
assertEq(value.key, "get");
assertEq(value[key], "get");
assertEq(value.getter, "getter");
assertEq(value[getter], "getter");
// A getter still gets a primitive this value even after going through a proxy.
proxy = new Proxy({
get getter2() {
"use strict";
assertEq(this, value);
return "getter2";
}
}, {});
Object.setPrototypeOf(prototype, proxy);
assertEq(value.getter2, "getter2");
assertEq(value[getter2], "getter2");
assertEq(value.getter, "getter");
assertEq(value[getter], "getter");
}
reportCompare(true, true);
|
