test(map): verify map.jinja dump using _mapdata state

* Semi-automated using https://github.com/myii/ssf-formula/pull/245

test/integration/share/libraries/system.rb

@@ -0,0 +1,99 @@
+# frozen_string_literal: true
+
+# system.rb -- InSpec resources for system values
+# Author: Daniel Dehennin <daniel.dehennin@ac-dijon.fr>
+# Copyright (C) 2020 Daniel Dehennin <daniel.dehennin@ac-dijon.fr>
+
+HOSTNAME_CMDS = %w[hostname hostnamectl].freeze
+HOSTNAME_CMDS_OPT = {
+  'hostname' => '-s',
+  'hostnamectl' => '--static'
+}.freeze
+
+class SystemResource < Inspec.resource(1)
+  name 'system'
+
+  attr_reader :platform
+  attr_reader :hostname
+
+  def initialize
+    @platform = build_platform
+    @hostname = found_hostname
+  end
+
+  private
+
+  def found_hostname
+    cmd = guess_hostname_cmd
+
+    unless cmd.exit_status.zero?
+      raise Inspec::Exceptions::ResourceSkipped,
+            "Error running '#{cmd}': #{cmd.stderr}"
+    end
+
+    cmd.stdout.chomp
+  end
+
+  def guess_hostname_cmd
+    HOSTNAME_CMDS.each do |cmd|
+      if inspec.command(cmd).exist?
+        return inspec.command("#{cmd} #{HOSTNAME_CMDS_OPT[cmd]}")
+      end
+    end
+
+    raise Inspec::Exceptions::ResourceSkipped,
+          "Error: #{@platform[:finger]}} has none of #{HOSTNAME_CMDS.join(', ')}"
+  end
+
+  def build_platform
+    {
+      family: build_platform_family,
+      name: build_platform_name,
+      release: build_platform_release,
+      finger: build_platform_finger
+    }
+  end
+
+  def build_platform_family
+    case inspec.platform[:name]
+    when 'arch'
+      'arch'
+    else
+      inspec.platform[:family]
+    end
+  end
+
+  def build_platform_name
+    case inspec.platform[:name]
+    when 'amazon'
+      'amazonlinux'
+    else
+      inspec.platform[:name]
+    end
+  end
+
+  def build_platform_release
+    case inspec.platform[:name]
+    when 'amazon'
+      # `2018` relase is named `1` in kitchen.yaml
+      inspec.platform[:release].gsub(/2018.*/, '1')
+    when 'arch'
+      'base-latest'
+    else
+      inspec.platform[:release]
+    end
+  end
+
+  def build_platform_finger
+    "#{build_platform_name}-#{build_finger_release}"
+  end
+
+  def build_finger_release
+    case inspec.platform[:name]
+    when 'ubuntu'
+      build_platform_release.split('.').slice(0, 2).join('.')
+    else
+      build_platform_release.split('.')[0]
+    end
+  end
+end