1 files changed, 37 insertions, 0 deletions
diff --git a/railties/test/application/middleware/show_exceptions_test.rb b/railties/test/application/middleware/show_exceptions_test.rb
new file mode 100644
index 0000000000..5487e41e0a
--- /dev/null
+++ b/railties/test/application/middleware/show_exceptions_test.rb
@@ -0,0 +1,37 @@
+require 'isolation/abstract_unit'
+
+module ApplicationTests
+  class ShowExceptionsTest < Test::Unit::TestCase
+    include ActiveSupport::Testing::Isolation
+
+    def setup
+      build_app
+      boot_rails
+      FileUtils.rm_rf "#{app_path}/config/environments"
+    end
+
+    def app
+      @app ||= Rails.application
+    end
+
+    test "unspecified route when set action_dispatch.show_exceptions to false" do
+      make_basic_app do |app|
+        app.config.action_dispatch.show_exceptions = false
+      end
+
+      assert_raise(ActionController::RoutingError) do
+        get '/foo'
+      end
+    end
+
+    test "unspecified route when set action_dispatch.show_exceptions to true" do
+      make_basic_app do |app|
+        app.config.action_dispatch.show_exceptions = true
+      end
+
+      assert_nothing_raised(ActionController::RoutingError) do
+        get '/foo'
+      end
+    end
+  end
+end