minitest-spec-expect

Expect syntax for Minitest. Made out of love for both rspec2's expect syntax and Minitest's lightweight feel.

Install

In your Gemfile:

gem 'minitest-spec-expect'

or from the command line:

$ gem install minitest-spec-expect

Then require it after your runner:

require 'minitest/autorun'
require 'minitest/spec/expect'

minitest-spec-expect works in the following ruby versions and implementations:

• 1.9.2
• 1.9.3
• 2.0.0
• 2.1.0
• JRuby

Usage

Wrap the object under test in an expect() object. Then call a Minitest expectation on it, substituting must and wont with to and to_not.

For example:

describe Integer do
  describe '#+' do
    it 'adds numbers correctly' do
      expect(1 + 1).to_equal 2
    end

    it 'does not add numbers incorrectly' do
      expect(1 + 1).to_not_equal 3
    end
  end
end

That's equivalent to:

describe Integer do
  describe '#+' do
    it 'adds numbers correctly' do
      (1 + 1).must_equal 2
    end

    it 'does not add numbers incorrectly' do
      (1 + 1).wont_equal 3
    end
  end
end

API

Please see the Minitest expectation docs for details on corresponding must_* and wont_* methods.

#*be

expect(1).to_be :<, 2
expect(1).to_not_be :>, 2

#*be_close_to/#*be_within_delta

expect(Math::PI).to_be_close_to 22.0/7.0, 0.01
expect(Math::PI).to_be_within_delta 22.0/7.0, 0.01
expect(Math::PI).to_not_be_close_to 22.0/6.0, 0.01
expect(Math::PI).to_not_be_within_delta 22.0/6.0, 0.01

#*be_empty

expect([]).to_be_empty
expect({awwyeah: :minitest}).to_not_be_empty

#*be_instance_of

expect([]).to_be_instance_of Array
expect([]).to_not_be_instance_of Hash

#*be_kind_of

expect([]).to_be_kind_of Enumerable
expect([]).to_not_be_kind_of NilClass

#*be_nil

expect(nil).to_be_nil
expect(:something).to_not_be_nil

#*be_same_as

expect(obj = Object.new).to_be_same_as obj
an_object = Object.new
expect(Object.new).to_not_be_same_as an_object

#to_be_silent

expect { '' }.to_be_silent
expect(->{''}).to_be_silent

#*be_within_epsilon

expect(4).to_be_within_epsilon 3.5, 0.15
expect(4).to_not_be_within_epsilon 3.5, 0.11

#*equal

expect('4d3d3d3d').to_equal '4d3d3d3d'
expect('4d3d3d3d').to_not_equal 'tayne'

#*include

expect(['tim', 'eric']).to_include 'eric'
expect(['tim', 'eric']).to_not_include 'brule'

#*match

expect('fartfartfartfart').to_match /(fart)*/
expect('bart').to_not_match /fart/

#to_output

expect { puts 'barf' }.to_output "barf\n"
expect(->{ puts 'barf' }).to_output "barf\n"

#to_raise

expect { raise RuntimeError }.to_raise RuntimeError
expect(->{ raise RuntimeError }).to_raise RuntimeError

#*respond_to

expect(Object.new).to_respond_to :must_respond_to
expect(Object.new).to_not_respond_to :fart_factory

#*throw

expect { throw StandardError }.to_throw StandardError
expect(->{ throw StandardError }).to_throw StandardError

Contribute

1. Fork the repo.
2. Create a branch.
3. Code.
4. Ensure the specs are green ($ rake)
5. Open a pull request.

License

The MIT License (MIT)

Copyright (c) 2013 Dave Jachimiak

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.