(maint) Improve acceptance tests

Added puppet7 acceptance tests
Added support for gem native extensions in acceptance tests
Fixed reporting of errors from the rake tasks

Author: da-ar

.travis.yml

@@ -29,3 +29,12 @@ jobs:
         - bundle exec rake litmus:install_gems
       script:
         - bundle exec rake litmus:acceptance:parallel
+    - bundler_args: ""
+      rvm: 2.7
+      before_script:
+        - bundle exec rake 'litmus:provision[docker, centos:7]'
+        - bundle exec rake 'litmus:install_agent[puppet7]'
+        - bundle exec rake 'litmus:install_modules_from_directory[./spec/fixtures/acceptance/modules]'
+        - bundle exec rake litmus:install_gems
+      script:
+        - bundle exec rake litmus:acceptance:parallel

Rakefile

@@ -70,13 +70,26 @@ namespace :litmus do
     result = run_command(install_command, target_nodes, config: nil, inventory: inventory_hash)
     if result.is_a?(Array)
       result.each do |node|
-        puts "#{node['node']} failed #{node['result']}" if node['status'] != 'success'
+        puts "#{node['target']} failed: '#{node['value']}'" if node['status'] != 'success'
       end
     else
       raise "Failed trying to run '#{install_command}' against inventory."
     end
   end
 
+  def install_build_tools(target_nodes, inventory_hash)
+    puts 'Installing build tools...'
+    install_build_command = "yum -y group install 'Development Tools'"
+    result = run_command(install_build_command, target_nodes, config: nil, inventory: inventory_hash)
+    if result.is_a?(Array)
+      result.each do |node|
+        puts "#{node['target']} failed: '#{node['value']}'" if node['status'] != 'success'
+      end
+    else
+      raise "Failed trying to run '#{install_build_command}' against inventory."
+    end
+  end
+
   # Install the gem under test and required fixture on a collection of nodes
   #
   # @param :target_node_name [Array] nodes on which to install a puppet module for testing.
@@ -92,11 +105,11 @@ namespace :litmus do
     include BoltSpec::Run
 
     # Build the gem
+    puts 'Building gem...'
     `gem build puppet-strings.gemspec --quiet`
     result = $CHILD_STATUS
     raise "Unable to build the puppet-strings gem. Returned exit code #{result.exitstatus}" unless result.exitstatus.zero?
 
-    puts 'Built'
     # Find the gem build artifact
     gem_tar = Dir.glob('puppet-strings-*.gem').max_by { |f| File.mtime(f) }
     raise "Unable to find package in 'puppet-strings-*.gem'" if gem_tar.nil?
@@ -111,6 +124,8 @@ namespace :litmus do
     puts 'Copying gem to targets...'
     upload_file(gem_tar, File.basename(gem_tar), target_string, inventory: inventory_hash)
 
+    install_build_tools(target_nodes, inventory_hash)
+
     # Install dependent gems
     puts 'Installing yard gem...'
     install_remote_gem('yard', target_nodes, inventory_hash)