chore(sidekiq): move rails spec to spec/isolated

Author: solnic

sentry-sidekiq/spec/sentry/rails_spec.rb renamed to sentry-sidekiq/spec/isolated/rails_spec.rb

@@ -1,12 +1,15 @@
 # frozen_string_literal: true
 
-return unless ENV["WITH_SENTRY_RAILS"]
+begin
+  require "simplecov"
+  SimpleCov.command_name "SidekiqRails"
+rescue LoadError
+end
 
 require "logger"
 
 require "rails"
 require "sentry-rails"
-require "spec_helper"
 
 require "action_controller/railtie"
 
@@ -23,15 +26,9 @@ def self.name
   app.config.hosts = nil
   app.config.secret_key_base = "test"
   app.config.eager_load = false
+
   app.initializer :configure_sentry do
-    Sentry.init do |config|
-      config.release = 'beta'
-      config.dsn = "dummy://12345:67890@sentry.localdomain:3000/sentry/42"
-      config.transport.transport_class = Sentry::DummyTransport
-      # for sending events synchronously
-      config.background_worker_threads = 0
-      yield(config, app) if block_given?
-    end
+    perform_basic_setup
   end
 
   app.initialize!