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  1. // Copyright Joyent, Inc. and other Node contributors.
  2. //
  3. // Permission is hereby granted, free of charge, to any person obtaining a
  4. // copy of this software and associated documentation files (the
  5. // "Software"), to deal in the Software without restriction, including
  6. // without limitation the rights to use, copy, modify, merge, publish,
  7. // distribute, sublicense, and/or sell copies of the Software, and to permit
  8. // persons to whom the Software is furnished to do so, subject to the
  9. // following conditions:
  10. //
  11. // The above copyright notice and this permission notice shall be included
  12. // in all copies or substantial portions of the Software.
  13. //
  14. // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15. // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  16. // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  17. // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  18. // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  19. // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  20. // USE OR OTHER DEALINGS IN THE SOFTWARE.
  21. var common = require('./common');
  22. var assert = require('assert');
  23. var events = require('../');
  24. var e = new events.EventEmitter();
  25. var hasDefineProperty = !!Object.defineProperty;
  26. try { Object.defineProperty({}, 'x', { value: 0 }); } catch (err) { hasDefineProperty = false }
  27. e.on('maxListeners', common.mustCall());
  28. // Should not corrupt the 'maxListeners' queue.
  29. e.setMaxListeners(42);
  30. var throwsObjs = [NaN, -1, 'and even this'];
  31. var maxError = /^RangeError: The value of "n" is out of range\. It must be a non-negative number\./;
  32. var defError = /^RangeError: The value of "defaultMaxListeners" is out of range\. It must be a non-negative number\./;
  33. for (var i = 0; i < throwsObjs.length; i++) {
  34. var obj = throwsObjs[i];
  35. assert.throws(function() { e.setMaxListeners(obj); }, maxError);
  36. if (hasDefineProperty) {
  37. assert.throws(function() { events.defaultMaxListeners = obj; }, defError);
  38. }
  39. }
  40. e.emit('maxListeners');