Add tests for route injecting task

lib/alchemy/install/tasks.rb

@@ -5,6 +5,8 @@
 module Alchemy
   module Install
     class Tasks < Thor
+      SENTINEL = /\.routes\.draw do(?:\s*\|map\|)?\s*$/
+
       include Thor::Actions
 
       no_tasks do
@@ -15,8 +17,9 @@ def inject_routes(auto_accept = false)
           unless auto_accept
             mountpoint = ask("- At which path do you want to mount Alchemy CMS at?", default: mountpoint)
           end
-          sentinel = /\.routes\.draw do(?:\s*\|map\|)?\s*$/
-          inject_into_file "./config/routes.rb", "\n  mount Alchemy::Engine => '#{mountpoint}'\n", {after: sentinel, verbose: true}
+
+          inject_into_file "./config/routes.rb", "\n  mount Alchemy::Engine => '#{mountpoint}'\n",
+            {after: SENTINEL, verbose: true}
         end
 
         def set_primary_language(code: "en", name: "English", auto_accept: false)

spec/libraries/alchemy/install/tasks_spec.rb

@@ -0,0 +1,77 @@
+require "rails_helper"
+require "alchemy/install/tasks"
+
+RSpec.describe Alchemy::Install::Tasks do
+  let(:tasks) { described_class.new }
+
+  describe "#inject_routes" do
+    subject { tasks.inject_routes(auto_accept) }
+
+    before do
+      allow(File).to receive(:read).and_return(routes_content)
+      allow(tasks).to receive(:inject_into_file)
+    end
+
+    context "with auto_accept" do
+      let(:auto_accept) { true }
+
+      context "when routes are already mounted" do
+        let(:routes_content) { "mount Alchemy::Engine" }
+
+        it "does not inject the routes" do
+          subject
+          expect(tasks).not_to have_received(:inject_into_file)
+        end
+      end
+
+      context "when routes are not mounted" do
+        let(:routes_content) { "get '/home', to: 'home#index'" }
+
+        it "injects the routes" do
+          subject
+          expect(tasks).to have_received(:inject_into_file).with(
+            "./config/routes.rb",
+            "\n  mount Alchemy::Engine => '/'\n",
+            {
+              after: Alchemy::Install::Tasks::SENTINEL,
+              verbose: true
+            }
+          )
+        end
+      end
+    end
+
+    context "without auto_accept" do
+      let(:auto_accept) { false }
+
+      before do
+        allow(tasks).to receive(:ask).and_return("/cms")
+      end
+
+      context "when routes are already mounted" do
+        let(:routes_content) { "mount Alchemy::Engine" }
+
+        it "does not inject the routes" do
+          subject
+          expect(tasks).not_to have_received(:inject_into_file)
+        end
+      end
+
+      context "when routes are not mounted" do
+        let(:routes_content) { "get '/home', to: 'home#index'" }
+
+        it "injects mountpoint into the routes" do
+          subject
+          expect(tasks).to have_received(:inject_into_file).with(
+            "./config/routes.rb",
+            "\n  mount Alchemy::Engine => '/cms'\n",
+            {
+              after: Alchemy::Install::Tasks::SENTINEL,
+              verbose: true
+            }
+          )
+        end
+      end
+    end
+  end
+end