philiplambok · September 7, 2020 04:43
diff --git a/webpacker.rb b/webpacker.rb
 # Prolog:
 #
 #   In default rails testing setup we actually will running assets compiling in every thread
 #   In this case, we doing 8 times compiling assets (becuase we use parallel_test for 8 threads).
 #   And in some cases (thread) our compiling doesn't work as expected, so, this module will help us
 #   to only run assets compiling at once.
 #
 #   This code was taken from:
 #   https://makandracards.com/makandra/46247-how-to-make-webpacker-compile-once-for-parallel-tests-and-only-if-necessary
 #
 # rubocop:disable Style/AccessModifierDeclarations, Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity
 module WebpackerTestSupport
  module_function def compile_once
    digest_file = Rails.root.join("tmp/webpacker_#{Rails.env}_digest")

    app_code = Dir[Webpacker.config.source_path.join('**/*')]
    npm_code = Dir[Rails.root.join('yarn.lock')]

    packable_contents = (app_code + npm_code)
                        .sort
                        .map { |filename| File.read(filename) if File.file?(filename) }
                        .join
    digest = Digest::SHA256.hexdigest(packable_contents)

    return if digest_file.exist? && digest_file.read == digest

    if ENV['TEST_ENV_NUMBER'].to_i < 1
      public_output_path = Webpacker.config.public_output_path
      FileUtils.rm_r(public_output_path) if File.exist?(public_output_path)
      puts "Removed Webpack output directory #{public_output_path}"

      Webpacker.compile

      digest_file.write(digest)
    else
      loop do
        break if digest_file.exist? && digest_file.read == digest

        sleep 0.1
      end
    end
  end
 end
 # rubocop:enable Style/AccessModifierDeclarations, Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity

 WebpackerTestSupport.compile_once

 # The configured asset host will become a `<base>` tag in the HTML's `<head>` and allow resolving test assets via the
 # development Rails server. This makes HTML-only screenshots for non-`@javascript` Scenarios prettier.
 # Note that you won't be using development assets, but the compiled files from inside `RAILS_ROOT/public/packs-test/`.
 Capybara.asset_host = 'http://localhost:3000/'
	# Prolog:
	#
	# In default rails testing setup we actually will running assets compiling in every thread
	# In this case, we doing 8 times compiling assets (becuase we use parallel_test for 8 threads).
	# And in some cases (thread) our compiling doesn't work as expected, so, this module will help us
	# to only run assets compiling at once.
	#
	# This code was taken from:
	# https://makandracards.com/makandra/46247-how-to-make-webpacker-compile-once-for-parallel-tests-and-only-if-necessary
	#
	# rubocop:disable Style/AccessModifierDeclarations, Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity
	module WebpackerTestSupport
	module_function def compile_once
	digest_file = Rails.root.join("tmp/webpacker_#{Rails.env}_digest")

	app_code = Dir[Webpacker.config.source_path.join('*/')]
	npm_code = Dir[Rails.root.join('yarn.lock')]

	packable_contents = (app_code + npm_code)
	.sort
	.map { \|filename\| File.read(filename) if File.file?(filename) }
	.join
	digest = Digest::SHA256.hexdigest(packable_contents)

	return if digest_file.exist? && digest_file.read == digest

	if ENV['TEST_ENV_NUMBER'].to_i < 1
	public_output_path = Webpacker.config.public_output_path
	FileUtils.rm_r(public_output_path) if File.exist?(public_output_path)
	puts "Removed Webpack output directory #{public_output_path}"

	Webpacker.compile

	digest_file.write(digest)
	else
	loop do
	break if digest_file.exist? && digest_file.read == digest

	sleep 0.1
	end
	end
	end
	end
	# rubocop:enable Style/AccessModifierDeclarations, Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity

	WebpackerTestSupport.compile_once

	# The configured asset host will become a `<base>` tag in the HTML's `<head>` and allow resolving test assets via the
	# development Rails server. This makes HTML-only screenshots for non-`@javascript` Scenarios prettier.
	# Note that you won't be using development assets, but the compiled files from inside `RAILS_ROOT/public/packs-test/`.
	Capybara.asset_host = 'http://localhost:3000/'