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// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.
/**
* Tests an object to determine whether it implements TokenCredential.
*
* @param credential - The assumed TokenCredential to be tested.
*/
export function isTokenCredential(credential) {
// Check for an object with a 'getToken' function and possibly with
// a 'signRequest' function. We do this check to make sure that
// a ServiceClientCredentials implementor (like TokenClientCredentials
// in ms-rest-nodeauth) doesn't get mistaken for a TokenCredential if
// it doesn't actually implement TokenCredential also.
const castCredential = credential;
return (castCredential &&
typeof castCredential.getToken === "function" &&
(castCredential.signRequest === undefined || castCredential.getToken.length > 0));
}
//# sourceMappingURL=tokenCredential.js.map