Init commit with test setup.

.gitignore

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+/.bundle/
+/.yardoc
+/Gemfile.lock
+/_yardoc/
+/coverage/
+/doc/
+/pkg/
+/spec/reports/
+/tmp/
+*.bundle
+*.so
+*.o
+*.a
+mkmf.log

Gemfile

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+source "https://rubygems.org"
+
+# Specify your gem's dependencies in twemoji.gemspec
+gemspec
+
+group :development do
+  gem "rake"
+  gem "bundler"
+  gem "pry"
+end
+
+group :test do
+  gem "minitest", ">= 5.5"
+end

LICENSE

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+Copyright (c) 2015 Juanito Fatas
+
+MIT License
+
+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.

README.md

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+# Html::Pipeline::RougeFilter
+
+[Rouge](https://github.com/jneen/rouge) integration for [HTML::Pipeline](https://github.com/jch/html-pipeline)
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+gem 'html-pipeline-rouge_filter'
+```
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install html-pipeline-rouge_filter
+
+## Usage
+
+TODO: Write usage instructions here
+
+## Contributing
+
+1. Fork it ( https://github.com/[my-github-username]/html-pipeline-rouge_filter/fork )
+2. Create your feature branch (`git checkout -b my-new-feature`)
+3. Commit your changes (`git commit -am 'Add some feature'`)
+4. Push to the branch (`git push origin my-new-feature`)
+5. Create a new Pull Request

Rakefile

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+require "bundler/gem_tasks"
+require "rake/testtask"
+
+Rake::TestTask.new do |t|
+  t.libs << "test"
+  t.test_files = FileList['test/**/*_test.rb']
+  t.verbose = true
+end
+
+task default: :test

html-pipeline-rouge_filter.gemspec

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+# coding: utf-8
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'html/pipeline/rouge_filter/version'
+
+Gem::Specification.new do |spec|
+  spec.name          = "html-pipeline-rouge_filter"
+  spec.version       = HTML_Pipeline::RougeFilter::VERSION
+  spec.authors       = ["Juanito Fatas"]
+  spec.email         = ["katehuang0320@gmail.com"]
+  spec.summary       = %q{Rouge integration with html-pipeline.}
+  spec.description   = spec.summary
+  spec.homepage      = "https://github.com/juanitofatas/html-pipeline-rouge_filter"
+  spec.license       = "MIT"
+
+  spec.files         = `git ls-files -z`.split("\x0")
+  spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
+  spec.require_paths = ["lib"]
+
+  spec.add_dependency "html-pipeline", "~> 1.11"
+  spec.add_dependency "rouge", "~> 1.8"
+end

lib/html/pipeline/rouge_filter.rb

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+require "html/pipeline/rouge_filter/version"
+require "html/pipeline/filter"
+
+module HTML
+  class Pipeline
+    class RougeFilter < Filter
+      def call
+      end
+    end
+  end
+end
+

lib/html/pipeline/rouge_filter/version.rb

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+# NOTE use HTML_Pipeline since HTML::Pipeline is a class
+# and we don't want to define it here inadvertently
+module HTML_Pipeline
+  class RougeFilter
+    VERSION = "0.0.1"
+  end
+end

test/rouge_filter_test.rb

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+require "test_helper"
+require "html/pipeline/rouge_filter"
+
+class HTML::Pipeline::RougeFilterTest < Minitest::Test
+  RougeFilter = HTML::Pipeline::RougeFilter
+
+  def setup
+  end
+
+  def test_version
+    assert_equal HTML_Pipeline::RougeFilter::VERSION, "0.0.1"
+  end
+end

test/test_helper.rb

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+require "bundler/setup"
+require "html/pipeline"
+require "minitest/autorun"
+
+module TestHelpers
+end
+
+Minitest::Test.send(:include, TestHelpers)