Update changelog with 2.4.0 info

CHANGELOG.md

@@ -5,6 +5,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased]
 
+## [2.4.0] - 2021-02-09
+### Added
+- Added `SWAGGER_DRY_RUN` env variable [#274](https://github.com/rswag/rswag/pull/274)
+
 ## [2.3.3] - 2021-02-07
 
 ### Fixed

README.md

@@ -616,15 +616,12 @@ after do |example|
 end
 ```
 
-You need to disable --dry-run option for Rspec > 3
+#### Dry Run Option ####
 
-<!-- This is now enabled by default in rswag.
+The `--dry-run` option is enabled by default for Rspec 3, but if you need to
-You need to set the ``` config.swagger_dry_run = false``` value in the spec/spec_helper.rb file.
+disable it you can use the environment varible `SWAGGER_DRY_RUN=0` during the
-This is one of the more powerful features of rswag. When rswag runs your integration test suite via ```bundle exec rspec```, it will capture the request and response bodies and output those values in the examples section.
+generation command or add the following to your `config/environments/test.rb`:
-These integration tests are usually written with ```let``` variables for post body parameters, and since its an integration test the service is returning actual values.
-We might as well re-use these values and embed them into the generated swagger to provide a more real world example for request/response examples. -->
 
-Add to config/environments/test.rb:
 ```ruby
 RSpec.configure do |config|
   config.swagger_dry_run = false

rswag-specs/lib/rswag/specs/configuration.rb

@@ -28,9 +28,11 @@ module Rswag
       end
 
       def swagger_dry_run
-        @swagger_dry_run ||= begin
+        return @swagger_dry_run if defined? @swagger_dry_run
-          @rspec_config.swagger_dry_run.nil? || @rspec_config.swagger_dry_run
+        if ENV.key?('SWAGGER_DRY_RUN')
+          @rspec_config.swagger_dry_run = ENV['SWAGGER_DRY_RUN'] == '1'
         end
+        @swagger_dry_run = @rspec_config.swagger_dry_run.nil? || @rspec_config.swagger_dry_run
       end
 
       def swagger_format