WrapIO

Allows the faking of input to STDIN and capturing of output from STDOUT with semantic method names. Great for testing!

Installation

Add this line to your application's Gemfile:

gem 'wrapio'

And then execute:

$ bundle

Or install it yourself as:

$ gem install wrapio

Usage

WrapIO

Captures output from STDOUT

# wrapio_test.rb

output = WrapIO.of do
    puts "Hello World!"
end

puts output

$ ruby wrapio_test.rb

"Hello World!"

Enable debug to see the faked STDIN

# wrapio_test.rb

WrapIO.debug = true
output = WrapIO.of('input') do
    gets
    puts 'output'
end

$ ruby wrapio_test.rb

-- WrapIO Capture#output  --
-- WrapIO Fake#gets 1 --
input
________________________
output

____________________________

Or use the internal module classes separately

WrapIO::Fake

# fake_test.rb

WrapIO::Fake.input('Hello!') do
    input = gets
end
puts input

$ ruby fake_test.rb

"Hello!"

WrapIO::Capture

# capture_test.rb

output = WrapIO::Capture.output do
    print "Hi!"
end
puts output

$ ruby capture_test.rb

"Hi!"

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/BideoWego/wrapio. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

The gem is available as open source under the terms of the MIT License.