Tempfile::Fixture

Have tempfile serve you IO fixtures.

Add this line to your application's Gemfile:

gem 'tempfile-fixture'

And then execute:

$ bundle

Or install it yourself as:

$ gem install tempfile-fixture

You can use the Fixture functionality anywhere. This is how you might use it:

# /test/test_helper.rb
 
require 'tempfile/fixture'  

def path_to_fixture(file) 
  File.expand_path(File.join('files', file), __dir__)
end

# /test/files/data.txt
42
11
99
23
12

# /test/my_fixture_test.rb

require_relative 'test_helper'

def test_calculate_sum
  Tempfile.Fixture(path_to_fixture('data.txt')) do |data_file|
    answer = calculate_sum(data_file.readlines)
    assert_equal 187, answer 
  end
end

Under the hood it's doing a FileUtils copy_file, so it will fail on directories (yay); you can pass binary: true to force the tempfile to have a binary encoding. This probably doesn't do anything :'), because it's copying metadata as well.

After checking out the repo, run bin/setup to install dependencies. Then, run rake test 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.

Bug reports and pull requests are welcome on GitHub at https://github.com/SleeplessByte/tempfile-fixture.