Implement Remote class

lib/producer/core.rb

@@ -4,6 +4,7 @@ require 'producer/core/env'
 require 'producer/core/errors'
 require 'producer/core/recipe'
 require 'producer/core/recipe/dsl'
+require 'producer/core/remote'
 require 'producer/core/task'
 require 'producer/core/task/dsl'
 require 'producer/core/version'

lib/producer/core/remote.rb

@@ -0,0 +1,18 @@
+module Producer
+  module Core
+    class Remote
+      require 'etc'
+      require 'net/ssh'
+
+      attr_accessor :hostname
+
+      def initialize(hostname)
+        @hostname = hostname
+      end
+
+      def session
+        @session ||= Net::SSH.start(@hostname, Etc.getlogin)
+      end
+    end
+  end
+end

producer-core.gemspec

@@ -19,6 +19,8 @@ Gem::Specification.new do |s|
   s.executables = s.files.grep(/\Abin\//) { |f| File.basename(f) }
 
 
+  s.add_dependency 'net-ssh'
+
   s.add_development_dependency 'rspec'
   s.add_development_dependency 'cucumber'
   s.add_development_dependency 'aruba'

spec/producer/core/remote_spec.rb

@@ -0,0 +1,32 @@
+require 'spec_helper'
+
+module Producer::Core
+  describe Remote do
+    let(:hostname)    { 'some_host.example' }
+    subject(:remote)  { Remote.new(hostname) }
+
+    describe '#hostname' do
+      it 'returns the assignated hostname' do
+        expect(remote.hostname).to be hostname
+      end
+    end
+
+    describe '#session' do
+      it 'builds a new SSH session to the remote host' do
+        expect(Net::SSH).to receive(:start).with(hostname, Etc.getlogin)
+        remote.session
+      end
+
+      it 'returns the session' do
+        session = double('SSH session')
+        allow(Net::SSH).to receive(:start) { session }
+        expect(remote.session).to eq session
+      end
+
+      it 'memoizes the session' do
+        allow(Net::SSH).to receive(:start) { Object.new }
+        expect(remote.session).to be remote.session
+      end
+    end
+  end
+end