36 lines
1.4 KiB
JavaScript
36 lines
1.4 KiB
JavaScript
/**
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* This is a total and terrible hack that allows us to create otherwise
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* uninstantiable jsdom objects. Currently this exposes a way to create
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* `FileList` objects.
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*
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* This was inspired by felipochoa's implementation in GitHub issue:
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* https://github.com/jsdom/jsdom/issues/1272. This implementation is
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* "better" because it does all of the dirty work during environment
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* setup. It still requires typing.
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*/
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import JsdomEnvironment from 'jest-environment-jsdom';
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export default class JsdomEnvironmentWithBackDoors extends JsdomEnvironment {
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async setup() {
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await super.setup();
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const jsdomUtils = require('jsdom/lib/jsdom/living/generated/utils');
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const jsdomFileList = require('jsdom/lib/jsdom/living/generated/FileList');
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this.global.backdoors = {
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newFileList: (...files) => {
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const impl = jsdomFileList.createImpl(this.global);
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const fileList = Object.assign([...files], {
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item: (i) => fileList[i],
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[jsdomUtils.implSymbol]: impl,
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});
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impl[jsdomUtils.wrapperSymbol] = fileList;
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const fileListCtor =
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this.global[jsdomUtils.ctorRegistrySymbol].FileList;
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Object.setPrototypeOf(fileList, fileListCtor.prototype);
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return fileList;
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},
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};
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}
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}
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