Update gem setup for tests

.github/workflows/linters.yml

@@ -12,23 +12,16 @@ jobs:
     steps:
     - uses: actions/checkout@v1
 
+    - name: Setup Gemfile
+      run: |
+        cp test/support/gemfile.rb Gemfile
+
     - name: Setup Ruby
       uses: ruby/setup-ruby@v1
       with:
         ruby-version: 2.6
         bundler-cache: true
 
-    - name: Set Gemfile
-      run: |
-        echo "">> Gemfile
-        echo "group :test do">> Gemfile
-        echo "  gem 'pandoc-ruby', require: false" >> Gemfile
-        echo "  gem 'rubocop', require: false" >> Gemfile
-        echo "  gem 'rubocop-performance', require: false" >> Gemfile
-        echo "  gem 'rubocop-rails', require: false" >> Gemfile
-        echo "  gem 'slim_lint', require: false" >> Gemfile
-        echo "end" >> Gemfile
-
     - name: Setup gems
       run: |
         bundle install --jobs 4 --retry 3

.github/workflows/tests.yml

@@ -91,15 +91,14 @@ jobs:
       - name: Prepare Redmine source
         working-directory: redmine
         run: |
-          sed -i '/rubocop/d' Gemfile
-          rm -f .rubocop*
           cp plugins/redmine_messenger/test/support/database-mysql.yml config/database.yml
           cp plugins/redmine_messenger/test/support/configuration.yml config/configuration.yml
 
       - name: Install Ruby dependencies
         working-directory: redmine
         run: |
-          bundle install --jobs=4 --retry=3 --without development
+          bundle config set --local without 'development'
+          bundle install --jobs=4 --retry=3
 
       - name: Run Redmine rake tasks
         env:

test/support/gemfile.rb

@@ -0,0 +1,9 @@
+source 'https://rubygems.org'
+
+group :test do
+  gem 'pandoc-ruby', require: false
+  gem 'rubocop', require: false
+  gem 'rubocop-performance', require: false
+  gem 'rubocop-rails', require: false
+  gem 'slim_lint', require: false
+end