ci: get Travis to test against rails 6 betas

.travis.yml

@@ -16,6 +16,7 @@ before_install:
 gemfile:
   - gemfiles/rack_2_0.gemfile
   - gemfiles/rack_1_6.gemfile
+  - gemfiles/rails_6_0.gemfile
   - gemfiles/rails_5_2.gemfile
   - gemfiles/rails_5_1.gemfile
   - gemfiles/rails_4_2.gemfile
@@ -31,6 +32,7 @@ gemfile:
 matrix:
   allow_failures:
     - rvm: ruby-head
+    - gemfile: gemfiles/rails_6_0.gemfile
 
   fast_finish: true
 

Appraisals

@@ -17,6 +17,11 @@ appraise "rack_1_6" do
   gem "rack-test", ">= 0.6"
 end
 
+appraise 'rails_6_0' do
+  gem 'actionpack', '~> 6.0.0.a'
+  gem 'activesupport', '~> 6.0.0.a'
+end
+
 appraise 'rails_5-2' do
   gem 'actionpack', '~> 5.2.0'
   gem 'activesupport', '~> 5.2.0'

gemfiles/rails_6_0.gemfile

@@ -0,0 +1,8 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "actionpack", "~> 6.0.0.a"
+gem "activesupport", "~> 6.0.0.a"
+
+gemspec path: "../"