configure CI job to run doctest (PR #61)

.travis.yml

@@ -0,0 +1,10 @@
+dist: trusty
+git:
+  depth: 2
+language: ruby
+rvm: 2.4.1
+cache: bundler
+env:
+  global:
+  - NOKOGIRI_USE_SYSTEM_LIBRARIES=true
+script: bundle exec rake doctest

Gemfile

@@ -5,6 +5,8 @@ gemspec
 # gem 'asciidoctor-doctest', :path => '/Users/carlson/dev/asciidoctor-doctest/'
 gem 'asciidoctor-doctest', github: 'jxxcarlson/asciidoctor-doctest', ref: 'latex'
 
+# FIXME temporarily downgrade Asciidoctor to pass tests
+gem 'asciidoctor', '1.5.5'
 
 # gem 'asciidoctor-doctest', :path => '/Users/carlson/.rvm/gems/ruby-2.3.0/gems/asciidoctor-doctest-1.5.2.dev'
 

test/examples/asciidoc-html/env.adoc

@@ -98,6 +98,5 @@ Buurem lok medes, nor. Paat for deng zu locnoop.
 //.jsxgraph
 [env.jsxgraph, width=200, height=200]
 --
- var board = JXG.JSXGraph.initBoard('box',
- {boundingbox: [-10, 10, 10, -10], axis:true});
+var board = JXG.JSXGraph.initBoard('box', {boundingbox: [-10, 10, 10, -10], axis:true});
 --

test/examples/html/env.html

@@ -119,8 +119,7 @@
     <script src="//cdnjs.cloudflare.com/ajax/libs/jsxgraph/0.99.3/jsxgraphcore.js" type="text/javascript"></script><script src="http://jsxgraph.uni-bayreuth.de/distrib/GeonextReader.js" type="text/javascript"></script>
     <div class="jxgbox" id="box" style="height: 200px; width: 200px;"></div>
     <script type="text/javascript">
-      var board = JXG.JSXGraph.initBoard('box',
-       {boundingbox: [-10, 10, 10, -10], axis:true});
+      var board = JXG.JSXGraph.initBoard('box', {boundingbox: [-10, 10, 10, -10], axis:true});
     </script><br>
   </div>
 </div>