Register dev tools assets whenever debug mode is enabled

lib/reactionview/railtie.rb

@@ -14,8 +14,8 @@ class Railtie < Rails::Railtie
       reactionview-dev-tools.umd.js
     ].freeze
 
-    initializer "reactionview.assets" do |app|
-      if ReActionView.config.development? && app.config.respond_to?(:assets)
+    initializer "reactionview.assets", after: :load_config_initializers do |app|
+      if ReActionView.config.debug_mode_enabled? && app.config.respond_to?(:assets)
         gem_root = Gem::Specification.find_by_name("reactionview").gem_dir
 
         app.config.assets.paths << File.join(gem_root, "app", "assets", "javascripts")

test/reactionview/railtie_test.rb

@@ -0,0 +1,91 @@
+# frozen_string_literal: true
+
+require_relative "../test_helper"
+
+class ReActionView::RailtieTest < Minitest::Spec
+  class FakeAssets
+    attr_accessor :paths, :precompile
+
+    def initialize
+      @paths = []
+      @precompile = []
+    end
+  end
+
+  class FakeConfig
+    attr_reader :assets
+
+    def initialize
+      @assets = FakeAssets.new
+    end
+  end
+
+  class FakeApp
+    attr_reader :config
+
+    def initialize
+      @config = FakeConfig.new
+    end
+  end
+
+  before do
+    @previous_debug_mode = ReActionView.config.debug_mode
+    @app = FakeApp.new
+  end
+
+  after do
+    ReActionView.config.debug_mode = @previous_debug_mode
+  end
+
+  def assets_initializer
+    ReActionView::Railtie.initializers.find { |initializer| initializer.name == "reactionview.assets" }
+  end
+
+  def run_assets_initializer(env)
+    Rails.stub(:env, ActiveSupport::StringInquirer.new(env)) do
+      assets_initializer.run(@app)
+    end
+  end
+
+  def gem_javascripts_path
+    File.join(Gem::Specification.find_by_name("reactionview").gem_dir, "app", "assets", "javascripts")
+  end
+
+  test "runs after config initializers so it can see the configured debug_mode" do
+    assert_equal :load_config_initializers, assets_initializer.after
+  end
+
+  test "installs assets outside development when debug mode is enabled" do
+    ReActionView.config.debug_mode = true
+
+    run_assets_initializer("production")
+
+    assert_includes @app.config.assets.paths, gem_javascripts_path
+    assert_equal ReActionView::Railtie::PRECOMPILE_ASSETS, @app.config.assets.precompile
+  end
+
+  test "does not install assets when debug mode is disabled" do
+    ReActionView.config.debug_mode = false
+
+    run_assets_initializer("production")
+
+    assert_empty @app.config.assets.paths
+    assert_empty @app.config.assets.precompile
+  end
+
+  test "installs assets in development when debug mode is left unset" do
+    ReActionView.config.debug_mode = nil
+
+    run_assets_initializer("development")
+
+    assert_includes @app.config.assets.paths, gem_javascripts_path
+  end
+
+  test "does not install assets outside development when debug mode is left unset" do
+    ReActionView.config.debug_mode = nil
+
+    run_assets_initializer("production")
+
+    assert_empty @app.config.assets.paths
+  end
+end