Provide primitive test coverage of the ticket pdf

Gemfile.lock

@@ -12,6 +12,7 @@ GEM
   remote: https://rubygems.org/
   remote: https://rails-assets.org/
   specs:
+    Ascii85 (1.0.3)
     actioncable (5.0.7.1)
       actionpack (= 5.0.7.1)
       nio4r (>= 1.2, < 3.0)
@@ -62,6 +63,7 @@ GEM
       activerecord (>= 3.0)
     addressable (2.5.2)
       public_suffix (>= 2.0.2, < 4.0)
+    afm (0.2.2)
     airbrake (7.4.0)
       airbrake-ruby (~> 2.12)
     airbrake-ruby (2.12.0)
@@ -226,6 +228,7 @@ GEM
       rubocop (>= 0.50.0)
       sysexits (~> 1.1)
     hashdiff (0.3.7)
+    hashery (2.1.2)
     hashie (3.5.7)
     html2haml (2.2.0)
       erubis (~> 2.7.0)
@@ -350,6 +353,14 @@ GEM
     parser (2.5.3.0)
       ast (~> 2.4.0)
     pdf-core (0.2.5)
+    pdf-inspector (1.3.0)
+      pdf-reader (>= 1.0, < 3.0.a)
+    pdf-reader (2.2.0)
+      Ascii85 (~> 1.0.0)
+      afm (~> 0.2.1)
+      hashery (~> 2.0)
+      ruby-rc4
+      ttfunk
     pg (1.1.3)
     piwik_analytics (1.0.2)
       actionpack
@@ -497,6 +508,7 @@ GEM
     ruby-oembed (0.12.0)
     ruby-openid (2.5.0)
     ruby-progressbar (1.10.0)
+    ruby-rc4 (0.1.5)
     ruby_dep (1.5.0)
     ruby_parser (3.11.0)
       sexp_processor (~> 4.9)
@@ -664,6 +676,7 @@ DEPENDENCIES
   omniauth-google-oauth2
   omniauth-openid
   paper_trail
+  pdf-inspector
   pg
   piwik_analytics (~> 1.0.1)
   prawn-qrcode (~> 0.2.2.1)