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

* Semi-automated using https://github.com/myii/ssf-formula/pull/285

salt/_mapdata/_mapdata.jinja

@@ -0,0 +1,13 @@
+# yamllint disable rule:indentation rule:line-length
+# {{ grains.get("osfinger", grains.os) }}
+---
+{#- use salt.slsutil.serialize to avoid encoding errors on some platforms #}
+{{ salt["slsutil.serialize"](
+     "yaml",
+     map,
+     default_flow_style=False,
+     allow_unicode=True,
+   )
+   | regex_replace("^\s+'$", "'", multiline=True)
+   | trim
+}}

salt/_mapdata/init.sls

@@ -0,0 +1,26 @@
+# -*- coding: utf-8 -*-
+# vim: ft=sls
+---
+{#- Get the `tplroot` from `tpldir` #}
+{%- set tplroot = tpldir.split("/")[0] %}
+{%- from tplroot ~ "/map.jinja" import salt_settings with context %}
+{%- from tplroot ~ "/map.jinja" import formulas_settings with context %}
+
+{%- set _mapdata = {
+      "values": {
+        "salt_settings": salt_settings,
+        "formulas_settings": formulas_settings,
+      }
+    } %}
+{%- 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" %}
+
+{{ tplroot }}-mapdata-dump:
+  file.managed:
+    - name: {{ output_file }}
+    - source: salt://{{ tplroot }}/_mapdata/_mapdata.jinja
+    - template: jinja
+    - context:
+        map: {{ _mapdata | yaml }}