Conditionally skip test job in ci.yml (#51289)

Skip generating a `test` job in ci.yml when a new application is
generated with the `--skip-test` option.

Co-authored-by: Rafael Mendonça França <rafael@rubyonrails.org>

railties/CHANGELOG.md

@@ -1,3 +1,8 @@
+*   Skip generating a `test` job in ci.yml when a new application is generated with the
+    `--skip-test` option.
+
+    *Steve Polito*
+
 *   Update the `.node-version` file conditionally generated for new applications to 20.11.1
 
     *Steve Polito*

railties/lib/rails/generators/rails/app/templates/github/ci.yml.tt

@@ -59,6 +59,7 @@ jobs:
         run: bin/rubocop -f github
 
 <% end -%>
+<% unless options[:skip_test] -%>
   test:
     runs-on: ubuntu-latest
 
@@ -134,3 +135,4 @@ jobs:
           name: screenshots
           path: ${{ github.workspace }}/tmp/screenshots
           if-no-files-found: ignore
+<% end -%>

railties/test/generators/app_generator_test.rb

@@ -534,6 +534,10 @@ def test_generator_if_skip_test_is_given
     assert_no_gem "selenium-webdriver"
 
     assert_no_directory("test")
+
+    assert_file ".github/workflows/ci.yml" do |file|
+      assert_no_match(/test:.\s*runs-on/m, file)
+    end
   end
 
   def test_generator_if_skip_jbuilder_is_given