Continue rejigging the lock files

.github/workflows/build_site.yml

@@ -32,7 +32,7 @@ jobs:
     name: Build the website
     runs-on: ubuntu-latest
     env:
-      BUNDLE_WITHOUT: lint
+      BUNDLE_WITH: build
     steps:
       - name: "Check out the repo"
         uses: actions/checkout@v4

.github/workflows/rubocop.yml

@@ -26,7 +26,7 @@ jobs:
     name: Lint the Ruby code
     runs-on: ubuntu-latest
     env:
-      BUNDLE_WITHOUT: build
+      BUNDLE_WITH: lint
     steps:
       - name: "Check out the repo"
         uses: actions/checkout@v4

.github/workflows/run_plugin_tests.yml

@@ -24,7 +24,7 @@ jobs:
     name: Run plugin tests
     runs-on: ubuntu-latest
     env:
-      BUNDLE_WITHOUT: lint
+      BUNDLE_WITH: build:test
     steps:
       - name: "Check out the repo"
         uses: actions/checkout@v4
@@ -52,4 +52,4 @@ jobs:
       - run: pip install -r requirements.txt
 
       - name: "Run the plugin tests"
-        run: bundle exec ruby src/_tests/tests.rb
+        run: ruby src/_tests/tests.rb

Gemfile

@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-group :build do
+group :build, optional: true do do
   gem 'chunky_png', '~> 1.4'
   gem 'color', '~> 1.8'
   gem 'html-proofer', '~> 5'
@@ -11,14 +11,19 @@ group :build do
   gem 'shell-executer', '~> 1.0'
 end
 
-group :lint do
+group :lint, optional: true do do
   gem 'rubocop', '~> 1.63'
 
-  # This dependency is specifically for CI in GitHub Actions; I don't
+  # These dependencies are specifically for CI in GitHub Actions; I don't
   # need it when I'm running locally.  If I try to run `bundle exec rubocop`
-  # in CI without it, I get an error:
+  # in CI without it, I get errors like:
   #
   #     cannot load such file -- rubocop-minitest
   #
-  gem 'rubocop-minitest', '~> 0.35.0'
+  gem 'rubocop-minitest'
+  gem 'rubocop-performance'
+end
+
+group :test, optional: true do do
+  gem 'test-unit'
 end

Gemfile.lock

@@ -102,6 +102,7 @@ GEM
       hashery (~> 2.0)
       ruby-rc4
       ttfunk
+    power_assert (2.0.3)
     public_suffix (5.0.5)
     racc (1.7.3)
     rainbow (3.1.1)
@@ -128,6 +129,9 @@ GEM
     rubocop-minitest (0.35.0)
       rubocop (>= 1.61, < 2.0)
       rubocop-ast (>= 1.31.1, < 2.0)
+    rubocop-performance (1.21.0)
+      rubocop (>= 1.48.1, < 2.0)
+      rubocop-ast (>= 1.31.1, < 2.0)
     ruby-progressbar (1.13.0)
     ruby-rc4 (0.1.5)
     ruby2_keywords (0.0.5)
@@ -140,6 +144,8 @@ GEM
       open4
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
+    test-unit (3.6.2)
+      power_assert
     timers (4.3.5)
     ttfunk (1.8.0)
       bigdecimal (~> 3.1)
@@ -162,8 +168,10 @@ DEPENDENCIES
   json-schema (~> 4)
   nokogiri (~> 1.16)
   rubocop (~> 1.63)
-  rubocop-minitest (~> 0.35.0)
+  rubocop-minitest
+  rubocop-performance
   shell-executer (~> 1.0)
+  test-unit
 
 BUNDLED WITH
    2.3.26