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setup-python/node_modules/jest-util/build/convertDescriptorToString.js
Danny McCormick 39c08a0eaa Initial pass
2019-06-26 21:12:00 -04:00

39 lines
1.2 KiB
JavaScript

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