feat(React) expose camelize_props function

lib/react-rails.rb

@@ -1,4 +1,4 @@
+require 'react'
 require 'react/jsx'
 require 'react/rails'
 require 'react/server_rendering'
-

lib/react.rb

@@ -0,0 +1,19 @@
+module React
+  # Recursively camelize `props`, returning a new Hash
+  # @param props [Object] If it's a Hash or Array, it will be recursed. Otherwise it will be returned.
+  # @return [Hash] a new hash whose keys are camelized strings
+  def self.camelize_props(props)
+    case props
+    when Hash
+      props.each_with_object({}) do |(key, value), new_props|
+        new_key = key.to_s.camelize(:lower)
+        new_value = camelize_props(value)
+        new_props[new_key] = new_value
+      end
+    when Array
+      props.map { |item| camelize_props(item) }
+    else
+      props
+    end
+  end
+end

lib/react/rails/component_mount.rb

@@ -24,7 +24,9 @@ def teardown(env)
       # on the client.
       def react_component(name, props = {}, options = {}, &block)
         options = {:tag => options} if options.is_a?(Symbol)
-        props = camelize_props_key(props) if camelize_props_switch
+        if camelize_props_switch
+          props = React.camelize_props(props)
+        end
 
         prerender_options = options[:prerender]
         if prerender_options
@@ -45,23 +47,6 @@ def react_component(name, props = {}, options = {}, &block)
 
         content_tag(html_tag, '', html_options, &block)
       end
-
-      private
-
-      def camelize_props_key(props)
-        return props unless props.is_a?(Hash)
-        props.inject({}) do |h, (k,v)|
-          h[k.to_s.camelize(:lower)] = case v
-          when Hash
-            camelize_props_key(v)
-          when Array
-            v.map {|i| camelize_props_key(i) }
-          else
-            v
-          end
-          h
-        end
-      end
     end
   end
 end

test/react_asset_test.rb

@@ -0,0 +1,47 @@
+require 'test_helper'
+
+class ReactAssetTest < ActionDispatch::IntegrationTest
+  setup do
+    clear_sprockets_cache
+  end
+
+  teardown do
+    clear_sprockets_cache
+  end
+
+  test 'asset pipeline should deliver drop-in react file replacement' do
+    app_react_file_path = File.expand_path("../dummy/vendor/assets/javascripts/react.js",  __FILE__)
+    react_file_token = "'test_confirmation_token_react_content_non_production';\n"
+    File.write(app_react_file_path, react_file_token)
+    manually_expire_asset("react.js")
+    react_asset = Rails.application.assets['react.js']
+
+    get '/assets/react.js'
+
+    File.unlink(app_react_file_path)
+
+    assert_response :success
+    assert_equal react_file_token.length, react_asset.to_s.length, "The asset pipeline serves the drop-in file"
+    assert_equal react_file_token.length, @response.body.length, "The asset route serves the drop-in file"
+  end
+
+  test 'precompiling assets works' do
+    begin
+      precompile_assets
+    ensure
+      clear_precompiled_assets
+    end
+  end
+
+  test "the development version with addons is loaded" do
+    asset = Rails.application.assets.find_asset('react')
+    assert asset.pathname.to_s.end_with?('development-with-addons/react.js')
+  end
+
+  test "the production build is optimized for production" do
+    production_path = File.expand_path("../../lib/assets/react-source/production/react.js", __FILE__)
+    production_js = File.read(production_path)
+    env_checks = production_js.scan("NODE_ENV")
+    assert_equal(0, env_checks.length, "Dead code is removed for production")
+  end
+end

test/react_test.rb

@@ -1,46 +1,31 @@
-require 'test_helper'
-class ReactTest < ActionDispatch::IntegrationTest
-  setup do
-    clear_sprockets_cache
-  end
-
-  teardown do
-    clear_sprockets_cache
-  end
-
-  test 'asset pipeline should deliver drop-in react file replacement' do
-    app_react_file_path = File.expand_path("../dummy/vendor/assets/javascripts/react.js",  __FILE__)
-    react_file_token = "'test_confirmation_token_react_content_non_production';\n"
-    File.write(app_react_file_path, react_file_token)
-    manually_expire_asset("react.js")
-    react_asset = Rails.application.assets['react.js']
-
-    get '/assets/react.js'
-
-    File.unlink(app_react_file_path)
-
-    assert_response :success
-    assert_equal react_file_token.length, react_asset.to_s.length, "The asset pipeline serves the drop-in file"
-    assert_equal react_file_token.length, @response.body.length, "The asset route serves the drop-in file"
-  end
-
-  test 'precompiling assets works' do
-    begin
-      precompile_assets
-    ensure
-      clear_precompiled_assets
-    end
-  end
-
-  test "the development version with addons is loaded" do
-    asset = Rails.application.assets.find_asset('react')
-    assert asset.pathname.to_s.end_with?('development-with-addons/react.js')
-  end
-
-  test "the production build is optimized for production" do
-    production_path = File.expand_path("../../lib/assets/react-source/production/react.js", __FILE__)
-    production_js = File.read(production_path)
-    env_checks = production_js.scan("NODE_ENV")
-    assert_equal(0, env_checks.length, "Dead code is removed for production")
+require "test_helper"
+
+class ReactTest < ActiveSupport::TestCase
+  def test_it_camelizes_props
+    raw_props = {
+      multi_word_sym: {
+        nested_key: [
+          {double_nested: true},
+          1,
+          "string item",
+          [ { nested_array: {} }],
+        ]
+      },
+      "alreadyCamelized" => :ok,
+    }
+
+    expected_props = {
+      "multiWordSym" => {
+        "nestedKey" => [
+          { "doubleNested" => true },
+          1,
+          "string item",
+          [ { "nestedArray" => {} }],
+        ]
+      },
+      "alreadyCamelized" => :ok
+    }
+
+    assert_equal expected_props, React.camelize_props(raw_props)
   end
 end