Add nokogiri -v to .travis.yml

[junaruga]

Hi,
I am using Fedora 24.
As I failed rake test in my local environment, let me send pull-request to see Travis CI test result.

$ ruby -v
ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-linux]

$ bundle -v
Bundler version 1.14.3

$ bundle install --path vendor/bundle

$ bundle list
Gems included by the bundle:
  * activesupport (5.0.1)
  * bundler (1.14.3)
  * concurrent-ruby (1.0.4)
  * i18n (0.8.0)
  * loofah (2.0.3)
  * mini_portile2 (2.1.0)
  * minitest (5.10.1)
  * nokogiri (1.7.0.1)
  * rails-dom-testing (2.0.2)
  * rails-html-sanitizer (1.0.3)
  * rake (12.0.0)
  * thread_safe (0.3.5)
  * tzinfo (1.2.2)

$ bundle exec rake test
/usr/local/ruby-2.4.0/bin/ruby -w -I"lib" -I"/home/jaruga/git/rails-html-sanitizer/vendor/bundle/ruby/2.4.0/gems/rake-12.0.0/lib" "/home/jaruga/git/rails-html-sanitizer/vendor/bundle/ruby/2.4.0/gems/rake-12.0.0/lib/rake/rake_test_loader.rb" "test/sanitizer_test.rb" "test/scrubbers_test.rb
...
  1) Failure:
SanitizersTest#test_strip_nested_tags [/home/jaruga/git/rails-html-sanitizer/test/sanitizer_test.rb:67]:
--- expected
+++ actual
@@ -1 +1 @@
-"Weia onclick='alert(document.cookie);'/>rdos"
+"Wei<a onclick='alert(document.cookie);'/>rdos"



  2) Failure:
SanitizersTest#test_should_sanitize_script_tag_with_multiple_open_brackets [/home/jaruga/git/rails-html-sanitizer/test/sanitizer_test.rb:363]:
Expected: alert("XSS");//
Actual: <alert("XSS");//<


  3) Failure:
SanitizersTest#test_strip_tags_with_many_open_quotes [/home/jaruga/git/rails-html-sanitizer/test/sanitizer_test.rb:102]:
Expected: ""
  Actual: "<<"


  4) Failure:
SanitizersTest#test_strip_invalid_html [/home/jaruga/git/rails-html-sanitizer/test/sanitizer_test.rb:61]:
Expected: ""
  Actual: "<<"


  5) Failure:
SanitizersTest#test_strip_links_with_tags_in_tags [/home/jaruga/git/rails-html-sanitizer/test/sanitizer_test.rb:128]:
--- expected
+++ actual
@@ -1 +1 @@
-"a href='hello'&gt;all <b>day</b> long/a&gt;"
+"&lt;a href='hello'&gt;all <b>day</b> long&lt;/a&gt;"


301 runs, 317 assertions, 5 failures, 0 errors, 0 skips
...

$ bundle exec vendor/bundle/ruby/2.4.0/bin/nokogiri -v
# Nokogiri (1.7.0.1)
    ---
    warnings: []
    nokogiri: 1.7.0.1
    ruby:
      version: 2.4.0
      platform: x86_64-linux
      description: ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-linux]
      engine: ruby
    libxml:
      binding: extension
      source: packaged
      libxml2_path: "/home/jaruga/git/rails-html-sanitizer/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.7.0.1/ports/x86_64-pc-linux-gnu/libxml2/2.9.4"
      libxslt_path: "/home/jaruga/git/rails-html-sanitizer/vendor/bundle/ruby/2.4.0/gems/nokogiri-1.7.0.1/ports/x86_64-pc-linux-gnu/libxslt/1.1.29"
      libxml2_patches: []
      libxslt_patches: []
      compiled: 2.9.4
      loaded: 2.9.4

$ rpm -q zlib-devel
zlib-devel-1.2.8-10.fc24.x86_64

[rails-bot]

Thanks for the pull request, and welcome! The Rails team is excited to review your changes, and you should hear from @rafaelfranca (or someone else) soon.

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. Due to the way GitHub handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

Please see the contribution instructions for more information.

[junaruga]

https://travis-ci.org/rails/rails-html-sanitizer/jobs/198133121

The test is success for Travis. and libxml2, libxslt are same version with my environment.

[junaruga]

Maybe situation is same with #49
In my case, I do not use system installed libxml2.

[kaspth]

Not sure I understand what the issue is here? :)

I'll close for now.

[nirvdrum]

I think the issue is Travis shows all the tests for v1.0.3 passing, but anyone trying to run the tests locally is going to see a failure. It's not immediately clear why because we can't see what versions of anything being run are. #66 fixes some of the tests, but I still see two failures. More output in Travis would be helpful in debugging.

[kaspth]

@nirvdrum looks like we're ignoring the Gemfile.lock. Do send a PR to ensure we check it in 👍