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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /webidl/ecmascript-binding/class-string-iterator-prototype-object.any.html - WPT Dashboard Interop Dashboard
- /webidl/ecmascript-binding/class-string-iterator-prototype-object.any.worker.html - WPT Dashboard Interop Dashboard
"use strict";
const iteratorProto = Object.getPrototypeOf((new URLSearchParams()).entries());
test(() => {
assert_own_property(iteratorProto, Symbol.toStringTag);
const propDesc = Object.getOwnPropertyDescriptor(iteratorProto, Symbol.toStringTag);
assert_equals(propDesc.value, "URLSearchParams Iterator", "value");
assert_equals(propDesc.configurable, true, "configurable");
assert_equals(propDesc.enumerable, false, "enumerable");
assert_equals(propDesc.writable, false, "writable");
}, "@@toStringTag exists with the appropriate descriptor");
test(() => {
assert_equals(Object.prototype.toString.call(iteratorProto), "[object URLSearchParams Iterator]");
}, "Object.prototype.toString");
test(t => {
assert_own_property(iteratorProto, Symbol.toStringTag, "Precondition for this test: @@toStringTag exists");
t.add_cleanup(() => {
Object.defineProperty(iteratorProto, Symbol.toStringTag, { value: "URLSearchParams Iterator" });
});
Object.defineProperty(iteratorProto, Symbol.toStringTag, { value: "Not URLSearchParams Iterator" });
assert_equals(Object.prototype.toString.call(iteratorProto), "[object Not URLSearchParams Iterator]");
}, "Object.prototype.toString applied after modifying @@toStringTag");
// was no @@toStringTag, it would fall back to a magic class string. This tests that the bug is
// fixed.
test(() => {
const iterator = (new URLSearchParams()).keys();
assert_equals(Object.prototype.toString.call(iterator), "[object URLSearchParams Iterator]");
Object.setPrototypeOf(iterator, null);
assert_equals(Object.prototype.toString.call(iterator), "[object Object]");
}, "Object.prototype.toString applied to a null-prototype instance");
test(t => {
const proto = Object.getPrototypeOf(iteratorProto);
t.add_cleanup(() => {
Object.setPrototypeOf(iteratorProto, proto);
});
Object.setPrototypeOf(iteratorProto, null);
assert_equals(Object.prototype.toString.call(iteratorProto), "[object URLSearchParams Iterator]");
}, "Object.prototype.toString applied after nulling the prototype");