Update .travis.yml to build all gemfiles

.travis.yml

@@ -5,6 +5,15 @@ rvm:
   - 2.3.3
   - 2.2.5
   - 2.1
+gemfile:
+  - Gemfile
+  - test/gemfiles/rails4.Gemfile
+  - test/gemfiles/no-rails.Gemfile
+
+matrix:
+  exclude:
+    - rvm: 2.1
+      gemfile: Gemfile
 
 sudo: false
 cache:
@@ -15,7 +24,7 @@ branches:
     - 'master'
     - 'develop'
 
-before_install: test/scripts/prepare-travis.sh
+before_install: gem install bundler
 bundler_args: "--deployment --without development --jobs=3 --retry=3"
 
 script: test/scripts/travis.sh

test/scripts/prepare-travis.sh

@@ -1,12 +0,0 @@
-#!/usr/bin/env bash
-
-set -x
-
-gem install bundler
-
-if [[ ${TRAVIS_RUBY_VERSION} == "2.1" ]]; then
-  # use rails 4 for ruby 2.1, because rails 5 needs ruby >= 2.2.2
-  echo "gem 'rails', '4.2.7.1'" >> Gemfile
-  bundle install --without development --jobs=3 --retry=3
-  bundle update rails
-fi

test/scripts/travis.sh

@@ -2,12 +2,11 @@
 
 set -x
 
-if [[ ${TRAVIS_RUBY_VERSION} == "2.1" ]]; then
-  # ruby 2.1
-  export NO_COVERAGE="true" # No coverage for rails 4, because controller specs are disabled
+if [[ ${BUNDLE_GEMFILE} =~ .*test/gemfiles/.*.Gemfile ]]; then
+  # No coverage for other gemfiles, because some specs are disabled
+  export NO_COVERAGE="true"
   bundle exec rake --trace
 else
-  # ruby >= 2.2
   bundle exec rake --trace
   test_exit_code=$?
   bundle exec codeclimate-test-reporter