Improvements from Rails plugin template

test/support/rails_app.rb

@@ -32,3 +32,14 @@ ActionController::TestCase.class_eval do
     key.nil? ? assigns : assigns[key]
   end
 end
+
+# ActiveRecord::Migrator.migrations_paths = [File.expand_path("../../test/dummy/db/migrate", __FILE__)]
+# ActiveRecord::Migrator.migrations_paths << File.expand_path('../../db/migrate', __FILE__)
+#
+# 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

test/test_helper.rb

@@ -1,3 +1,5 @@
+# Configure Rails Environment
+ENV['RAILS_ENV'] = 'test'
 require 'bundler/setup'
 
 begin
@@ -35,10 +37,15 @@ else
   $minitest_version = 5
   # https://github.com/seattlerb/minitest/blob/e21fdda9d/lib/minitest/autorun.rb
   # https://github.com/seattlerb/minitest/blob/e21fdda9d/lib/minitest.rb#L45-L59
+  # Filter out Minitest backtrace while allowing backtrace from other libraries
+  # to be shown.
+  Minitest.backtrace_filter = Minitest::BacktraceFilter.new
 end
 
 require 'support/rails_app'
 
+# require "rails/test_help"
+
 require 'support/serialization_testing'
 
 require 'support/rails5_shims'