karma + mocha + should v7 not working - should is undefined

Question

I am trying to configure karma + mocha + should but I must be missing something since should is undefined in my tests.

According to the plugin documentation, the only steps to follow are:

1.- Add should to frameworks and karma-should to plugins keys in your karma configuration:

module.exports = function(config) {
  config.set({
    frameworks: ['mocha', 'should'],
    plugins: ['karma-should']
  });
};

All should assertions are available in the tests

This is my config:

package.json

"devDependencies": {
    "karma": "^0.13.3",
    "karma-chrome-launcher": "^0.2.0",
    "karma-firefox-launcher": "^0.1.6",
    "karma-mocha": "^0.2.0",
    "karma-phantomjs-launcher": "^0.2.0",
    "karma-requirejs": "^0.2.2",
    "karma-should": "0.0.1",
    "mocha": "^2.2.5",
    "should": "^7.0.2",
  }

karma.conf.js

config.set({

    // base path that will be used to resolve all patterns (eg. files, exclude)
    basePath: '',


    // frameworks to use
    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
    frameworks: ['mocha', 'should'],

    plugins: ['karma-mocha',
              'karma-should',
              'karma-chrome-launcher',
              'karma-firefox-launcher'],

simpleTest.js

describe('theAnswer()', function() {
  it('should be 42', function() {
    theAnswer().should.be.exactly(42);
  });
});


function theAnswer() {
  return 42;
}

When I run karma start I'm getting:

Firefox 39.0.0 (Windows 7 0.0.0) theAnswer() should be 42 FAILED
    theAnswer(...).should is undefined

Any idea why??

Answer 1

It seems to be a problem with the plugin implementation due to a package change in should 7.x.x:

There's an open pull request for this: https://github.com/seegno/karma-should/pull/1

The current plugin version (0.0.1) works up to should 6.x.x.

EDIT: The latest karma-should plugin release (1.0.0) corrects this issue.