1 files changed, 24 insertions, 0 deletions
diff --git a/railties/test/engine_test.rb b/railties/test/engine_test.rb
new file mode 100644
index 0000000000..68406dce4c
--- /dev/null
+++ b/railties/test/engine_test.rb
@@ -0,0 +1,24 @@
+require 'abstract_unit'
+
+class EngineTest < ActiveSupport::TestCase
+  it "reports routes as available only if they're actually present" do
+    engine = Class.new(Rails::Engine) do
+      def initialize(*args)
+        @routes = nil
+        super
+      end
+    end
+
+    assert !engine.routes?
+  end
+
+  it "does not add more paths to routes on each call" do
+    engine = Class.new(Rails::Engine)
+
+    engine.routes
+    length = engine.routes.draw_paths.length
+
+    engine.routes
+    assert_equal length, engine.routes.draw_paths.length
+  end
+end