rspec custom matchers - each, enum, and match_in_order
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README.rdoc

rspec-multi-matchers

Summary

  • test collection using each or other enumerable methods

  • makes testing more natural and have a friendlier failure message

HomePage

DESCRIPTION:

require 'rubygems'
require 'spec'
require 'rspec_multi_matchers'

describe 'array of ones' do
  it 'should be all ones' do
    [1,2,3].should each { |n| 
      n.should == 1
    }
  end

  # this is a new shortcut for a smaller use case
  it 'should be all ones' do
    [1,1,1].should each be_eql(1)
  end
end

=begin output
'array of ones should fail on 2' FAILED
    line: 14
  item 1: 2
expected: 1,
     got: 2 (using ==)
=end

As expected, the output shows expected and got fields line is the line number of the expectiation inside the block the item line gives the index of the item being yielded to the block, and the item itself

Warning

Note the use of brackets '{ … }' instead of 'do … end' this is necessary because 'do .. end' does not bind strongly enough

RELATED ARTICLES:

INSTALL:

  • gem install rspec_multi_matchers

LICENSE:

(The MIT License)

Copyright © 2010 Greg Weber

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.