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/*
* Copyright 2017 Jeremy Scheff
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
import { DOMStringList } from "../idbtypes";
/** @public */
export interface FakeDOMStringList extends Array<string> {
contains: (value: string) => boolean;
item: (i: number) => string | null;
}
// Would be nicer to sublcass Array, but I'd have to sacrifice Node 4 support to do that.
export const fakeDOMStringList = (arr: string[]): FakeDOMStringList => {
const arr2 = arr.slice();
Object.defineProperty(arr2, "contains", {
value: (value: string) => arr2.indexOf(value) >= 0,
});
Object.defineProperty(arr2, "item", {
value: (i: number) => {
if (i < 0 || i >= arr2.length) {
return null;
}
return arr2[i];
},
});
return arr2 as FakeDOMStringList;
};
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