More JSON factset tests

- Test for known IP address
- Test out json-schema testing

Gemfile

@@ -4,6 +4,10 @@ gemspec
 
 gem 'facter', ENV.fetch('FACTER_GEM_VERSION', nil), require: false
 
+group :test do
+  gem 'json_schemer'
+end
+
 group :development do
   gem 'faraday-retry', require: false
   gem 'github_changelog_generator', '>= 1.16.4', require: false

spec/facts_schema_spec.rb

@@ -0,0 +1,94 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require 'digest'
+require 'pathname'
+require 'json_schemer'
+
+schema = {
+  '$id': 'https://voxpupuli.org/facterdb/factset.schema.json',
+  title: 'Factset',
+  description: 'A saved puppet facter factset',
+
+  'type' => 'object',
+
+  properties: {
+    aio_agent_version: { 'type' => 'string' },
+    os: {
+      type: 'object',
+      properties: {
+        family: { enum: %w[RedHat Debian Gentoo windows OpenBSD Archlinux Suse FreeBSD Darwin Solaris] },
+      },
+    },
+  },
+
+  #  "required": ["_meta_generation_date"],
+
+  allOf: [
+    {
+      if: { properties: { os: { properties: { family: { enum: ['Debian'] } } } } },
+      then: { required: ['aio_agent_version'] },
+      #      'else': { 'required': ["aio_agent_version"] }
+    },
+  ],
+}
+
+schemer = JSONSchemer.schema(schema)
+RSpec::Matchers.define :be_valid_json do
+  match do |actual|
+    content = File.binread(actual)
+    begin
+      JSON.parse(content)
+      true
+    rescue JSON::ParserError => e
+      raise "Invalid JSON file #{actual}.\n#{e}"
+    end
+  end
+
+  failure_message do |actual|
+    "expected that fact file #{actual} was a valid JSON file."
+  end
+end
+
+RSpec::Matchers.define :have_facter_version do |expected_facter_version, filepath|
+  match do |actual|
+    # Simple but naive regex check
+    actual =~ /^#{expected_facter_version}($|\.)/
+  end
+
+  failure_message do |actual|
+    "expected that fact file #{filepath} with facter version #{actual} had a facter version that matched #{expected_facter_version}"
+  end
+end
+
+describe 'Factset Schemas are Valid', type: :feature do
+  before do
+    ENV['FACTERDB_SKIP_DEFAULTDB'] = nil
+    FacterDB.instance_variable_set(:@database, nil)
+  end
+
+  project_dir = Pathname.new(__dir__).parent
+  FacterDB.default_fact_files.each do |filepath|
+    relative_path = Pathname.new(filepath).relative_path_from(project_dir).to_s
+    describe relative_path do
+      subject(:content) do
+        JSON.parse(File.binread(filepath))
+      end
+
+      it 'contains a valid JSON document' do
+        expect(filepath).to be_valid_json
+      end
+
+      it 'contains a fact set which matches the facter version' do
+        facter_dir_path = File.basename(File.dirname(filepath))
+
+        expect(content['facterversion']).to have_facter_version(facter_dir_path, filepath)
+      end
+
+      it 'matches the schema' do
+        valid_json = schemer.validate(content).to_a
+        expect(valid_json).to be_empty
+      end
+    end
+  end
+end

spec/facts_spec.rb

@@ -90,7 +90,7 @@
 
       it 'contains newer networking facts hash' do
         if Gem::Version.new(content['facterversion']) >= Gem::Version.new('3.0.0')
-          expect(content['networking']['ip']).to not_be_nil.and not_be_empty
+          expect(content['networking']['ip']).to eq('10.0.2.15')
           expect(content['networking']['ip6']).to not_be_nil.and not_be_empty
           expect(content['networking']['hostname']).to eq('foo')
           expect(content['networking']['domain']).to eq('example.com')