refactor(map): use top-level values: key in map.jinja dumps

* Semi-automated using myii/ssf-formula#284

Author: myii

php/_mapdata/_mapdata.jinja

@@ -1,9 +1,9 @@
 # yamllint disable rule:indentation rule:line-length
-# {{ grains.get('osfinger', grains.os) }}
+# {{ grains.get("osfinger", grains.os) }}
 ---
 {#- use salt.slsutil.serialize to avoid encoding errors on some platforms #}
-{{ salt['slsutil.serialize'](
-     'yaml',
+{{ salt["slsutil.serialize"](
+     "yaml",
      map,
      default_flow_style=False,
      allow_unicode=True,

php/_mapdata/init.sls

@@ -2,18 +2,23 @@
 # vim: ft=sls
 ---
 {#- Get the `tplroot` from `tpldir` #}
-{%- set tplroot = tpldir.split('/')[0] %}
-{%- from tplroot ~ "/map.jinja" import php as mapdata with context %}
+{%- set tplroot = tpldir.split("/")[0] %}
+{%- from tplroot ~ "/map.jinja" import php with context %}
 
-{%- do salt['log.debug']('### MAP.JINJA DUMP ###\n' ~ mapdata | yaml(False)) %}
+{%- set _mapdata = {
+      "values": {
+        "php": php,
+      }
+    } %}
+{%- do salt["log.debug"]("### MAP.JINJA DUMP ###\n" ~ _mapdata | yaml(False)) %}
 
-{%- set output_dir = '/temp' if grains.os_family == 'Windows' else '/tmp' %}
-{%- set output_file = output_dir ~ '/salt_mapdata_dump.yaml' %}
+{%- set output_dir = "/temp" if grains.os_family == "Windows" else "/tmp" %}
+{%- set output_file = output_dir ~ "/salt_mapdata_dump.yaml" %}
 
 {{ tplroot }}-mapdata-dump:
   file.managed:
     - name: {{ output_file }}
     - source: salt://{{ tplroot }}/_mapdata/_mapdata.jinja
     - template: jinja
     - context:
-        map: {{ mapdata | yaml }}
+        map: {{ _mapdata | yaml }}

test/integration/default/controls/_mapdata_spec.rb

@@ -5,19 +5,43 @@
 control '`map.jinja` YAML dump' do
   title 'should match the comparison file'
 
-  # Strip the `platform[:finger]` version number down to the "OS major release"
-  mapdata_file = "_mapdata/#{system.platform[:finger].split('.').first}.yaml"
+  ### Method
+  # The steps below for each file appear convoluted but they are both required
+  # and similar in nature:
+  # 1. The earliest method was to simply compare the files textually but this often
+  #    led to false positives due to inconsistencies (e.g. spacing, ordering)
+  # 2. The next method was to load the files back into YAML structures and then
+  #    compare but InSpec provided block diffs this way, unusable by end users
+  # 3. The final step was to dump the YAML structures back into a string to use
+  #    for the comparison; this both worked and provided human-friendly diffs
 
-  # Load the mapdata from profile https://docs.chef.io/inspec/profiles/#profile-files
-  mapdata_dump = YAML.safe_load(inspec.profile.file(mapdata_file))
+  ### Comparison file for the specific platform
+  ### Static, adjusted as part of code contributions, as map data is changed
+  # Strip the `platform[:finger]` version number down to the "OS major release"
+  platform_finger = system.platform[:finger].split('.').first.to_s
+  # Use that to set the path to the file (relative to the InSpec suite directory)
+  mapdata_file_path = "_mapdata/#{platform_finger}.yaml"
+  # Load the mapdata from profile, into a YAML structure
+  # https://docs.chef.io/inspec/profiles/#profile-files
+  mapdata_file_yaml = YAML.safe_load(inspec.profile.file(mapdata_file_path))
+  # Dump the YAML back into a string for comparison
+  mapdata_file_dump = YAML.dump(mapdata_file_yaml)
 
-  # Derive the location of the dumped mapdata
+  ### Output file produced by running the `_mapdata` state
+  ### Dynamic, generated during Kitchen's `converge` phase
+  # Derive the location of the dumped mapdata (differs for Windows)
   output_dir = platform[:family] == 'windows' ? '/temp' : '/tmp'
-  output_file = "#{output_dir}/salt_mapdata_dump.yaml"
+  # Use that to set the path to the file (absolute path, i.e. within the container)
+  output_file_path = "#{output_dir}/salt_mapdata_dump.yaml"
+  # Load the output into a YAML structure using InSpec's `yaml` resource
+  # https://github.com/inspec/inspec/blob/49b7d10/lib/inspec/resources/yaml.rb#L29
+  output_file_yaml = yaml(output_file_path).params
+  # Dump the YAML back into a string for comparison
+  output_file_dump = YAML.dump(output_file_yaml)
 
   describe 'File content' do
     it 'should match profile map data exactly' do
-      expect(yaml(output_file).params).to eq(mapdata_dump)
+      expect(output_file_dump).to eq(mapdata_file_dump)
     end
   end
 end