better-expect

Assert-style handling of exceptions, modeled after better-assert for self-documenting failure messages.

Basically does the opposit of assert, by expecting an error to be thrown.

Installation

$ npm install better-expect

Example

As with better-assert, expectations can be deactivated with the NO_ASSERT environmental variable.

var expect = require('better-expect');
 
function test() {
  throw new Error();
};
 
expect(Error, test);
// (passes)
 
expect(Error, function() { return; });
// ExpectationError: Error, function() { return; }
//    at Object.<anonymous> (~/better-expect/example.js:8:1)
//    at Module._compile (module.js:449:26)
//    at Object.Module._extensions..js (module.js:467:10)
//    at Module.load (module.js:356:32)
//    at Function.Module._load (module.js:312:12)
//    at Module.runMain (module.js:492:10)
//    at process.startup.processNextTick.process._tickCallback (node.js:244:9)

See the tests for more examples.

License

(The MIT License)

Copyright (c) 2013 Torkild Dyvik Olsen torkild@tdolsen.net

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit 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.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.