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40 lines
1.2 KiB
JavaScript
40 lines
1.2 KiB
JavaScript
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'use strict';
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Object.defineProperty(exports, '__esModule', {
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value: true
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});
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exports.default = convertDescriptorToString;
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/**
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* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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// See: https://github.com/facebook/jest/pull/5154
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function convertDescriptorToString(descriptor) {
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if (
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typeof descriptor === 'string' ||
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typeof descriptor === 'number' ||
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descriptor === undefined
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) {
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return descriptor;
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}
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if (typeof descriptor !== 'function') {
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throw new Error('describe expects a class, function, number, or string.');
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}
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if (descriptor.name !== undefined) {
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return descriptor.name;
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} // Fallback for old browsers, pardon Flow
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const stringified = descriptor.toString();
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const typeDescriptorMatch = stringified.match(/class|function/);
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const indexOfNameSpace = // @ts-ignore: typeDescriptorMatch exists
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typeDescriptorMatch.index + typeDescriptorMatch[0].length;
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const indexOfNameAfterSpace = stringified.search(/\(|\{/);
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const name = stringified.substring(indexOfNameSpace, indexOfNameAfterSpace);
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return name.trim();
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}
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