AssetNotPrecompiledError should be raise when config.assets.digest = false, config.assets.compile = false and manifest file isn't present

actionpack/lib/sprockets/helpers/rails_helper.rb

@@ -124,7 +124,7 @@ module Sprockets
           end
 
           if compile_assets
-            if asset = asset_environment[logical_path]
+            if digest_assets && asset = asset_environment[logical_path]
               return asset.digest_path
             end
             return logical_path
@@ -137,7 +137,7 @@ module Sprockets
           if source[0] == ?/
             source
           else
-            source = digest_for(source) if digest_assets
+            source = digest_for(source)
             source = File.join(dir, source)
             source = "/#{source}" unless source =~ /^\//
             source

railties/test/application/assets_test.rb

@@ -180,6 +180,32 @@ module ApplicationTests
       assert_match(/app.js isn't precompiled/, last_response.body)
     end
 
+    test "assets raise AssetNotPrecompiledError when manifest file is present and requested file isn't precompiled if digest is disabled" do
+      app_file "app/views/posts/index.html.erb", "<%= javascript_include_tag 'app' %>"
+      app_file "config/initializers/compile.rb", "Rails.application.config.assets.compile = false"
+
+      app_file "config/routes.rb", <<-RUBY
+        AppTemplate::Application.routes.draw do
+          match '/posts', :to => "posts#index"
+        end
+      RUBY
+
+      ENV["RAILS_ENV"] = "development"
+      capture(:stdout) do
+        Dir.chdir(app_path){ `bundle exec rake assets:precompile` }
+      end
+
+      # Create file after of precompile
+      app_file "app/assets/javascripts/app.js", "alert();"
+
+      require "#{app_path}/config/environment"
+      class ::PostsController < ActionController::Base ; end
+
+      get '/posts'
+      assert_match(/AssetNotPrecompiledError/, last_response.body)
+      assert_match(/app.js isn't precompiled/, last_response.body)
+    end
+
     test "precompile appends the md5 hash to files referenced with asset_path and run in the provided RAILS_ENV" do
       app_file "app/assets/stylesheets/application.css.erb", "<%= asset_path('rails.png') %>"
       # digest is default in false, we must enable it for test environment