34 lines
1.2 KiB
JavaScript
34 lines
1.2 KiB
JavaScript
"use strict";
|
|
|
|
test(() => {
|
|
const observableArray = document.adoptedStyleSheets;
|
|
assert_array_equals(
|
|
Object.getOwnPropertyNames(observableArray),
|
|
["length"],
|
|
"Initially only \"length\".");
|
|
|
|
observableArray["zzz"] = true;
|
|
observableArray["aaa"] = true;
|
|
assert_array_equals(
|
|
Object.getOwnPropertyNames(observableArray),
|
|
["length", "zzz", "aaa"],
|
|
"Own properties whose key is a string have been added.");
|
|
|
|
observableArray[0] = new CSSStyleSheet();
|
|
observableArray[1] = new CSSStyleSheet();
|
|
assert_array_equals(
|
|
Object.getOwnPropertyNames(observableArray),
|
|
["0", "1", "length", "zzz", "aaa"],
|
|
"Own properties whose key is an array index have been added.");
|
|
|
|
observableArray[Symbol.toStringTag] = "string_tag";
|
|
observableArray[Symbol.toPrimitive] = "primitive";
|
|
assert_array_equals(
|
|
Object.getOwnPropertyNames(observableArray),
|
|
["0", "1", "length", "zzz", "aaa"],
|
|
"Own properties whose key is a symbol have been added (non-symbol).");
|
|
assert_array_equals(
|
|
Object.getOwnPropertySymbols(observableArray),
|
|
[Symbol.toStringTag, Symbol.toPrimitive],
|
|
"Own properties whose key is a symbol have been added (symbol).");
|
|
}, "ObservableArray's ownKeys trap");
|