Add default rake test task and setup for tests

.gitignore

@@ -1,4 +1,9 @@
 .bundle/
 log/*.log
 test/dummy/tmp/
+test/dummy/db/*.sqlite3
+test/dummy/db/*.sqlite3-journal
+test/dummy/log/*.log
 swagger_ui_engine-*.gem
+
+test/dummy/log/test.log

Rakefile

@@ -6,10 +6,23 @@ end
 
 require 'rdoc/task'
 
+load 'rails/tasks/statistics.rake'
+require 'bundler/gem_tasks'
+require 'rake/testtask'
+
+Rake::TestTask.new(:test) do |t|
+  t.libs << 'lib'
+  t.libs << 'test'
+  t.pattern = 'test/**/*_test.rb'
+  t.verbose = false
+end
+
 RDoc::Task.new(:rdoc) do |rdoc|
   rdoc.rdoc_dir = 'rdoc'
   rdoc.title    = 'SwaggerUiEngine'
   rdoc.options << '--line-numbers'
   rdoc.rdoc_files.include('README.rdoc')
   rdoc.rdoc_files.include('lib/**/*.rb')
 end
+
+task default: :test

test/test_helper.rb

@@ -0,0 +1,17 @@
+# Configure Rails Environment
+ENV['RAILS_ENV'] = 'test'
+
+require File.expand_path('../../test/dummy/config/environment.rb', __FILE__)
+require 'rails/test_help'
+
+# Filter out Minitest backtrace while allowing backtrace from other libraries
+# to be shown.
+Minitest.backtrace_filter = Minitest::BacktraceFilter.new
+
+# Load fixtures from the engine
+if ActiveSupport::TestCase.respond_to?(:fixture_path=)
+  ActiveSupport::TestCase.fixture_path = File.expand_path('../fixtures', __FILE__)
+  ActionDispatch::IntegrationTest.fixture_path = ActiveSupport::TestCase.fixture_path
+  ActiveSupport::TestCase.file_fixture_path = ActiveSupport::TestCase.fixture_path + '/files'
+  ActiveSupport::TestCase.fixtures :all
+end