Creates rspec structure

Author: rrcosta

.rspec

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+--require spec_helper
+--format documentation

spec/rails_helper.rb

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+require 'spec_helper'
+ENV['RAILS_ENV'] ||= 'test'
+require File.expand_path('../../config/environment', __FILE__)
+abort("The Rails environment is running in production mode!") if Rails.env.production?
+require 'rspec/rails'
+
+begin
+  ActiveRecord::Migration.maintain_test_schema!
+rescue ActiveRecord::PendingMigrationError => e
+  puts e.to_s.strip
+  exit 1
+end
+
+RSpec.configure do |config|
+  config.fixture_path = "#{::Rails.root}/spec/fixtures"
+
+  config.use_transactional_fixtures = true
+
+  config.infer_spec_type_from_file_location!
+
+  config.filter_rails_from_backtrace!
+end

spec/spec_helper.rb

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+RSpec.configure do |config|
+  config.expect_with :rspec do |expectations|
+    expectations.include_chain_clauses_in_custom_matcher_descriptions = true
+  end
+
+  config.mock_with :rspec do |mocks|
+    mocks.verify_partial_doubles = true
+  end
+
+  config.shared_context_metadata_behavior = :apply_to_host_groups
+end