adding the install stuff

install/install.feature

@@ -0,0 +1,23 @@
+Feature: Installation of dependencies
+  In order to check that the supplied homework can be graded by AutoGrader
+  As an AutoGrader deployer
+  I need to check the installation
+
+  Scenario: Install gems
+    Given that I am in the project root directory "ruby-intro"
+    When I install gems
+    Then I should see that there are no errors
+
+  Scenario: Install or check AutoGraders
+    Given that I am in the project root directory "ruby-intro"
+    When I install or check "saasbook/rag" as "rag"
+    And I change to branch "develop"
+    And I install the AutoGrader gems
+    And I run cucumber for AutoGrader
+    Then I should see that there are no errors
+
+  Scenario: Verify correct version of AutoGraders
+    Given I go to the AutoGrader directory "rag"
+    And it has an origin of "saasbook/rag"
+    When I fetch the latest on origin branch "develop"
+    Then I should see no difference

install/install_steps.rb

@@ -0,0 +1,79 @@
+require 'open3'
+
+def run_in_dir(arg_string, dir=@dir)
+  run_process(arg_string, dir, false)
+end
+
+def run_process(cli_string, dir='.', gemfile=false)
+  if gemfile
+    @test_output, @test_errors, @test_status = Open3.capture3(
+        { 'BUNDLE_GEMFILE' => 'Gemfile' }, cli_string, :chdir => dir
+    )
+  else
+    @test_output, @test_errors, @test_status = Open3.capture3(
+        cli_string, :chdir => dir
+    )
+  end
+  raise ( @test_output + @test_errors + @test_status.to_s ) unless @test_status.success?
+end
+
+Given /^that I am in the project root directory "(.*?)"$/ do |project_dir|
+  @project_dir = project_dir
+  expect(File.basename(Dir.getwd)).to eq @project_dir
+end
+
+Given(/^I go to the AutoGrader directory "(.*?)"$/) do |rag|
+  @dir = rag
+end
+
+Given(/^it has an origin of "(.*?)"$/) do |origin|
+  run_in_dir("git remote -v")
+  origin = "https://github.com/#{origin}".gsub('.git', '')
+  @test_output = @test_output.gsub('.git', '')
+  expect(@test_output).to match(/origin\t#{origin} \(fetch\)/)
+end
+
+When(/^I install gems$/) do
+  @dir = Dir.getwd
+  run_process 'bundle install', '.', true
+end
+
+When(/^I install or check "(.*)" as "(.*)"$/) do |repo, dir|
+  if ! Dir.exists?(dir)
+    puts "Clone AutoGraders as '#{dir}'"
+    run_process("git clone https://github.com/#{repo} #{dir}" )
+  else
+    puts "Existing '#{dir}'. Skip clone, fetch instead."
+    run_in_dir("git fetch origin", dir )
+  end
+  @dir = dir if  Dir.exists?(dir)
+  steps %Q{Given it has an origin of "#{repo}"}
+end
+
+When(/^I fetch the latest on origin branch "(.*?)"$/) do |branch|
+  @branch = branch
+  run_in_dir("git fetch origin #{@branch}")
+end
+
+When(/^I change to branch "(.*?)"$/) do |branch|
+  run_in_dir("git checkout #{branch}")
+end
+
+When(/^I install the AutoGrader gems$/) do
+  run_process('bundle install', @dir, true)
+end
+
+When /^I run cucumber for AutoGrader$/ do
+  @test_output, @test_errors, @test_status = Open3.capture3(
+      { 'BUNDLE_GEMFILE' => 'Gemfile' }, 'bundle exec cucumber', :chdir => 'rag'
+  )
+end
+
+Then(/^I should see no difference$/) do
+  run_in_dir("git diff origin/#{@branch}")
+  expect(@test_output == '').to be_true
+end
+
+Then(/^I should see that there are no errors$/) do
+  expect(@test_status).to be_success
+end