node/test/parallel/test-tls-client-default-ciphers.js

// Copyright Joyent, Inc. and other Node contributors.
//
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// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
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// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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'use strict';
const common = require('../common');
if (!common.hasCrypto)
  common.skip('missing crypto');

const assert = require('assert');
const tls = require('tls');

function Done() {}

function test1() {
  let ciphers = '';

  tls.createSecureContext = function(options) {
    ciphers = options.ciphers;
    throw new Done();
  };

  assert.throws(tls.connect, Done);

  assert.strictEqual(ciphers, tls.DEFAULT_CIPHERS);
}
test1();