display mountable engine routes on RoutingError.

1 files changed, 20 insertions, 2 deletions

diff --git a/actionpack/test/dispatch/debug_exceptions_test.rb b/actionpack/test/dispatch/debug_exceptions_test.rb
index 39e791b4f4..1319eba9ac 100644
--- a/actionpack/test/dispatch/debug_exceptions_test.rb
+++ b/actionpack/test/dispatch/debug_exceptions_test.rb
@@ -45,8 +45,17 @@ class DebugExceptionsTest < ActionDispatch::IntegrationTest
     end
   end
 
-  ProductionApp  = ActionDispatch::DebugExceptions.new(Boomer.new(false))
-  DevelopmentApp = ActionDispatch::DebugExceptions.new(Boomer.new(true))
+  def setup
+    app = ActiveSupport::OrderedOptions.new
+    app.config = ActiveSupport::OrderedOptions.new
+    app.config.assets = ActiveSupport::OrderedOptions.new
+    app.config.assets.prefix = '/sprockets'
+    Rails.stubs(:application).returns(app)
+  end
+
+  RoutesApp = Struct.new(:routes).new(SharedTestRoutes)
+  ProductionApp  = ActionDispatch::DebugExceptions.new(Boomer.new(false), RoutesApp)
+  DevelopmentApp = ActionDispatch::DebugExceptions.new(Boomer.new(true), RoutesApp)
 
   test 'skip diagnosis if not showing detailed exceptions' do
     @app = ProductionApp
@@ -78,6 +87,15 @@ class DebugExceptionsTest < ActionDispatch::IntegrationTest
     assert boomer.closed, "Expected to close the response body"
   end
 
+  test 'displays routes in a table when a RoutingError occurs' do
+    @app = DevelopmentApp
+    get "/pass", {}, {'action_dispatch.show_exceptions' => true}
+    routing_table = body[/route_table.*<.table>/m]
+    assert_match '/:controller(/:action)(.:format)', routing_table
+    assert_match ':controller#:action', routing_table
+    assert_no_match '&lt;|&gt;', routing_table, "there should not be escaped html in the output"
+  end
+
   test "rescue with diagnostics message" do
     @app = DevelopmentApp