Simple crash test controller

app/controllers/crash_test_controller.rb

@@ -0,0 +1,5 @@
+class CrashTestController < ApplicationController
+  def index
+    1/0
+  end
+end

config/routes.rb

@@ -181,6 +181,8 @@
 
   # API STUB
   get '/api/v1/taxon_names/' => 'api/v1/taxon_names#all'
+
+  get '/crash_test/' => 'crash_test#index' unless Rails.env.production?
 
   # Example of regular route:
   #   get 'products/:id' => 'catalog#view'

spec/controllers/crash_test_controller_spec.rb

@@ -0,0 +1,11 @@
+require 'rails_helper'
+
+RSpec.describe CrashTestController, :type => :controller do
+  describe "#index" do
+    it "crashes when visited" do
+      expect { get(:index) }.to raise_error(ZeroDivisionError)
+    end
+
+  end
+
+end

spec/routing/crash_test_routing_spec.rb

@@ -0,0 +1,20 @@
+require "rails_helper"
+
+describe CrashTestController, :type => :routing do
+  describe "routing" do
+    context "when in production" do
+      # before { Rails.stub_chain(:env, :production?) { true } }
+      it "is not routable", skip: "config/routes.rb evaluated too early. Re-evaluation possible?" do
+        expect(get("/crash_test")).to_not be_routable
+      end
+    end
+
+    context "when not in production" do
+      it "routes to #index" do
+        expect(get("/crash_test")).to route_to("crash_test#index")
+      end
+    end
+
+  end
+
+end