Switch from TestUnit to Minitest (#1805)

* Use `Minitest::Test`

`Test::Unit` is deprecated, and we can switch to `Minitest::Test` with
almost no side effects.

This commit does all of the work required to make Minitest tests run
with Gollum's existing test helpers.

* Change Minitest output format

- The `DefaultReporter` seems to have cleaner output than what we had
  before.
- `color: true` ensures things are colorized. It's pretty nice.

* Tweak test formatting; fix order-dependent failure

The order-dependent failure has been been commented in code.

After manually bisecting the test suite, I was able to determine that
the template cascade tests were leaving the `@@template_priority_path`
set to an overridden value in tests run afterward.

* Tweak setting initialization

I could not see a meaningful reason behind calling `forbid` so early in
the settings initialization block. But moving the `forbid` call until
later resolved this issue.

In the real world, I don't see how this would cause issues. But I found
that calling `forbid` when `wiki_options[:allow_editing]` was set to
false caused order-dependent test errors where Sprockets would end up
being badly configured and left without an initialized
`Sprockets::Environment` object, which is required by the
`sprockets-helpers` gem to resolve asset paths.

The test that would cause errors is also in this commit diff. I've
updated it to be a bit more readable.

I also took this opportunity to review and clean up the `@allow_editing`
assignment, which seemed a bit obfuscated.

* Update migration script to test run warnings

When running the entire test suite, many warnings would be output:

/Users/bw/Projects/gollum/test/test_migrate.rb:37: warning: already initialized constant HYPHENATE
/Users/bw/Projects/gollum/test/test_migrate.rb:37: warning: previous definition of HYPHENATE was here
/Users/bw/Projects/gollum/test/test_migrate.rb:37: warning: already initialized constant PAGE_FILE_DIR
/Users/bw/Projects/gollum/test/test_migrate.rb:37: warning: previous definition of PAGE_FILE_DIR was here
/Users/bw/Projects/gollum/bin/gollum-migrate-tags:91: warning: already initialized constant REPO
/Users/bw/Projects/gollum/bin/gollum-migrate-tags:91: warning: previous definition of REPO was here
/Users/bw/Projects/gollum/bin/gollum-migrate-tags:236: warning: already initialized constant TREE
/Users/bw/Projects/gollum/bin/gollum-migrate-tags:236: warning: previous definition of TREE was here
/Users/bw/Projects/gollum/test/test_migrate.rb:37: warning: already initialized constant PAGE_FILE_DIR
/Users/bw/Projects/gollum/test/test_migrate.rb:37: warning: previous definition of PAGE_FILE_DIR was here
/Users/bw/Projects/gollum/bin/gollum-migrate-tags:91: warning: already initialized constant REPO
/Users/bw/Projects/gollum/bin/gollum-migrate-tags:91: warning: previous definition of REPO was here
/Users/bw/Projects/gollum/bin/gollum-migrate-tags:236: warning: already initialized constant TREE
/Users/bw/Projects/gollum/bin/gollum-migrate-tags:236: warning: previous definition of TREE was here

While it's unlikely that end users would ever see these warnings, as
they'd only be running the migration script once, they will always be
shown in our local test runs and CI run output.

So instead of using constants in our migration script, I change the
script to use class variables instead. This should not effect the
functionality of the migration script whatsoever.

* Use `File.exist?` instead of `File.exists?`

In Ruby 3.x, `File.exists?` is deprecated and outputs a warning.

* Improve "allow editing" tests

While making changes to the test suite, I ran into some issues with
these tests failing on occasion.

I added some setup and teardown to help with this.

But one thing I did notice is that the word "Upload" appears in the
response body whether uploading is enabled or not, so I made these
assertions more specific to the HTML rather than other places the word
"Upload" might appear (which is related to Critic Markup).

* Do not attempt to modify frozen strings

Using `#gsub!` here now results in an error. I am not entirely sure why
this hasn't happened before, but the error is straightforward:

     FrozenError: can't modify frozen String: "Author %{author} is from %{location}"
        /home/runner/work/gollum/gollum/lib/gollum/views/helpers/locale_helpers.rb:45:in `gsub!'
        /home/runner/work/gollum/gollum/lib/gollum/views/helpers/locale_helpers.rb:45:in `fill_argument_content'
        /home/runner/work/gollum/gollum/lib/gollum/views/helpers/locale_helpers.rb:37:in `block in autofill'
        /home/runner/work/gollum/gollum/lib/gollum/views/helpers/locale_helpers.rb:33:in `each'
        /home/runner/work/gollum/gollum/lib/gollum/views/helpers/locale_helpers.rb:33:in `map'
        /home/runner/work/gollum/gollum/lib/gollum/views/helpers/locale_helpers.rb:33:in `autofill'
        /home/runner/work/gollum/gollum/lib/gollum/views/helpers/locale_helpers.rb:35:in `block in autofill'
        /home/runner/work/gollum/gollum/lib/gollum/views/helpers/locale_helpers.rb:33:in `each'
        /home/runner/work/gollum/gollum/lib/gollum/views/helpers/locale_helpers.rb:33:in `map'
        /home/runner/work/gollum/gollum/lib/gollum/views/helpers/locale_helpers.rb:33:in `autofill'
        /home/runner/work/gollum/gollum/lib/gollum/views/helpers/locale_helpers.rb:21:in `t'
        /home/runner/work/gollum/gollum/test/gollum/views/test_locale_helper.rb:95:in `block (4 levels) in <top (required)>'

`#gsub!` attempts to modify a string in-place, which does not work when
a string is frozen. It seems that in some Ruby environments, strings
from YAML files are frozen.

* Fix another order-dependent test failure

Very occasionally, this test fails due to `Precious::App` settings set
in previous tests. You can reproduce this failure using this seed:

    bundle exec rake TESTOPTS="--seed=42898"

bin/gollum-migrate-tags

@@ -11,8 +11,11 @@ migrate_options = {
   :hyphenate => true
 }
 
-def setting(const)
-  Object.const_defined?(const.upcase) && Object.const_get(const.upcase)
+def setting(variable_name)
+  class_variable_name = :"@@#{variable_name.to_s}"
+
+  Object.class_variable_defined?(class_variable_name) &&
+    Object.class_variable_get(class_variable_name)
 end
 
 opts = OptionParser.new do |opts|
@@ -25,7 +28,7 @@ It finds and repairs Gollum link tags that no longer work under 5.x for three re
 * 5.x wiki internal links are no longer 'global'.
 
 * NB: you can use the --lenient-tag-lookup option in gollum >= 5.x to enable 4.x-backwards compatible tags.
-  
+
 See https://github.com/gollum/gollum/wiki/5.0-release-notes#filename-handling for more information.
 Usage of this script comes without any warranty.
 
@@ -38,7 +41,7 @@ You can use the --page-file-dir and --config options as you would normally with
 Requires a non-bare repository. Recommended usage:
 
 1. Clone your wiki's repository to create a backup.
-2. Run this script on your cloned repo. 
+2. Run this script on your cloned repo.
 3. If all looks sane, run the script with the --write option. This will overwrite files in your working directory, but not commit the changes, so you have time to review them.
 4. Do a 'git diff' to inspect the changes.
 5. Commit the changes if all looks sane, and push/pull them back into your original repo.
@@ -52,23 +55,23 @@ EOF
   opts.on('--page-file-dir [PATH]', 'Specify the subdirectory for all pages. Default: repository root.') do |path|
     wiki_options[:page_file_dir] = path
   end
-    
+
   opts.on('--prefer-relative-links', 'When specified, will try to replace broken links with relative links (\'[[Foo/Bar]]\' instead of \'[[/Subdir/Foo/Bar]]\') where possible.') do
     migrate_options[:prefer_relative] = true
   end
-  
+
   opts.on('--hyphenate', 'Default. Repair links that use spaces instead of hyphens: [[Bilbo Baggins]] -> [[Bilbo-Baggins]]') do
     migrate_options[:hyphenate] = true
   end
-  
+
   opts.on('--no-hyphenate', 'Turn off the --hyphenate option.') do
     migrate_options[:hyphenate] = false
   end
-  
+
   opts.on('--run-silent', 'Don\'t output anything.') do
     migrate_options[:run_silent] = true
   end
-  
+
   opts.on('--write', 'No dry run: actually perform the substitutions.') do
     migrate_options[:no_dry_run] = true
   end
@@ -78,8 +81,11 @@ end
 begin
   opts.parse!
   migrate_options.each do |setting, value|
-    const = setting.to_s.upcase
-    Object.const_set(const, value) unless Object.const_defined?(const)
+    variable_name = :"@@#{setting.to_s}"
+
+    unless Object.class_variable_defined?(variable_name)
+      Object.class_variable_set(variable_name, value)
+    end
   end
   wiki_options[:page_file_dir] = setting(:page_file_dir) ? setting(:page_file_dir) : wiki_options[:page_file_dir] # Allow settings :page_file_dir through PAGE_FILE_DIR constant.
 rescue OptionParser::InvalidOption
@@ -88,7 +94,7 @@ rescue OptionParser::InvalidOption
   exit
 end
 
-REPO = ARGV[0] || Dir.pwd
+wiki_directory = ARGV[0] || Dir.pwd
 
 require 'gollum-lib'
 
@@ -98,7 +104,7 @@ if cfg = options[:config]
   cfg = File.join(Dir.getwd, cfg) unless cfg.slice(0) == File::SEPARATOR
   require cfg
 end
-  
+
 class Gollum::Filter::CodeMigrator < Gollum::Filter::Code
   def extract(data)
     case @markup.format
@@ -126,7 +132,7 @@ class Gollum::Filter::CodeMigrator < Gollum::Filter::Code
         next '' if m_end.length < m_start.length
         lang = m_lang ? m_lang.strip.split.first : nil
         cache_codeblock($~.to_s)
-      end  
+      end
     end
 
     data.gsub!(/^([ ]{0,3})``` ?([^\r\n]+)?\r?\n(.+?)\r?\n[ ]{0,3}```[ \t]*\r?$/m) do
@@ -134,7 +140,7 @@ class Gollum::Filter::CodeMigrator < Gollum::Filter::Code
     end
     data
   end
-  
+
   def process(data)
     return data if data.nil? || data.size.zero? || @map.size.zero?
     @map.each do |id, block| ## Just put the code blocks back in verbatim
@@ -142,23 +148,23 @@ class Gollum::Filter::CodeMigrator < Gollum::Filter::Code
     end
     data
   end
-  
+
   def cache_codeblock(block)
     id = "#{open_pattern}#{Digest::SHA1.hexdigest(block)}#{close_pattern}"
     @map[id] = block
     id
   end
 end
-  
+
 class ::Gollum::Filter::TagMigrator < Gollum::Filter::Tags
   def process_tag(tag)
     link_part, extra = parse_tag_parts(tag)
     orig_tag = %{[[#{tag}]]}
     return orig_tag if link_part.nil?
-    
+
     img_args = extra ? [extra, link_part] : [link_part]
     mime = MIME::Types.type_for(::File.extname(img_args.first.to_s)).first
-    
+
     # For any kind of tag other than an internal link: just return the tag.
     if tag =~ /^_TOC_/ || link_part =~ /^_$/ || link_part =~ /^#{INCLUDE_TAG}/ || (mime && mime.content_type =~ /^image/) || process_external_link_tag(link_part, extra) || process_file_link_tag(link_part, extra)
       return orig_tag
@@ -168,7 +174,7 @@ class ::Gollum::Filter::TagMigrator < Gollum::Filter::Tags
     link = link_part
     page = find_page_or_file_from_path(link)
     anchor = nil
-    
+
     if page.nil? # No match yet, now try finding the page with anchor removed
       if pos = link.rindex('#')
         anchor = link[pos..-1]
@@ -203,12 +209,12 @@ class ::Gollum::Filter::TagMigrator < Gollum::Filter::Tags
         pick = possibles.first
         return tag_for_pick(pick, orig_tag, extra, anchor, @markup.page.path)
       end
-        
+
     end
   end
-  
+
   private
-  
+
   def tag_for_pick(pick, orig_tag, extra, anchor, linking_page_path)
     pick = if setting(:prefer_relative)
       overlapping_path = Pathname.new(linking_page_path).dirname.to_s
@@ -220,7 +226,7 @@ class ::Gollum::Filter::TagMigrator < Gollum::Filter::Tags
     end
     new_tag = extra.nil? ? %{[[#{pick}#{anchor}]]} : %{[[#{extra}|#{pick}#{anchor}]]}
     log(:info, "#{@markup.page.path}: Changing #{orig_tag} -> #{new_tag}")
-    new_tag    
+    new_tag
   end
 end
 
@@ -232,8 +238,12 @@ end
 
 filter_chain = [:PlainTextMigrator, :CodeMigrator, :TagMigrator]
 
-wiki = ::Gollum::Wiki.new(REPO, wiki_options.merge({:filter_chain => filter_chain}))
-TREE = wiki.tree_list(wiki.ref, true, true).map {|file| ::File.join('/', file.path)}
+wiki = ::Gollum::Wiki.new(wiki_directory, wiki_options.merge({:filter_chain => filter_chain}))
+
+Object.class_variable_set(
+  :"@@wiki_tree",
+  wiki.tree_list(wiki.ref, true, true).map {|file| ::File.join('/', file.path)}
+)
 
 def find_linked(link)
   link.gsub!(' ', '-') if setting(:hyphenate) # Match paths containing dashes instead of spaces
@@ -243,7 +253,9 @@ def find_linked(link)
   test_path = ::File.extname(link).empty? ? /#{link}\..+/ : link
   # Select pages from the wiki whose path =~ 'Foo/Bar/Samwi.*'
   # Match case-insenstively to mimic 4.x behavior!
-  TREE.select {|path| path =~ /^\/(.*\/)?#{test_path}/i}
+  Object.class_variable_get(:"@@wiki_tree").select { |path|
+    path =~ /^\/(.*\/)?#{test_path}/i
+  }
 end
 
 def log(kind, msg = nil)
@@ -268,4 +280,4 @@ wiki.pages.each do |page|
     f.close
   end
   log(:none, '====')
-end
+end

lib/gollum/app.rb

@@ -103,8 +103,7 @@ module Precious
     end
 
     before do
-      settings.wiki_options[:allow_editing] = settings.wiki_options.fetch(:allow_editing, true)
-      @allow_editing = settings.wiki_options[:allow_editing]
+      @allow_editing = settings.wiki_options.fetch(:allow_editing, true)
       @critic_markup = settings.wiki_options[:critic_markup]
       @redirects_enabled = settings.wiki_options.fetch(:redirects_enabled, true)
       @per_page_uploads = settings.wiki_options[:per_page_uploads]
@@ -112,8 +111,6 @@ module Precious
       
       @wiki_title = settings.wiki_options.fetch(:title, 'Gollum Wiki')
 
-      forbid unless @allow_editing || request.request_method == 'GET'
-
       if settings.wiki_options[:template_dir]
         Precious::Views::Layout.extend Precious::Views::TemplateCascade
         Precious::Views::Layout.template_priority_path = settings.wiki_options[:template_dir]
@@ -143,6 +140,8 @@ module Precious
           config.manifest = Sprockets::Manifest.new(settings.sprockets, @static_assets_path)
         end
       end
+
+      forbid unless @allow_editing || request.request_method == 'GET'
     end
 
     get '/' do

lib/gollum/views/helpers/locale_helpers.rb

@@ -42,7 +42,7 @@ module Precious
       end
 
       def fill_argument_content(i18n_key, i18n_value)
-        i18n_value.gsub!(YAML_VARIABLE_REGEXP) do |argument|
+        i18n_value = i18n_value.gsub(YAML_VARIABLE_REGEXP) do |argument|
           method_name = argument.gsub(/[^\w]/, '')
 
           next if method_name.nil?

lib/gollum/views/template_cascade.rb

@@ -11,9 +11,13 @@ module Precious
       end
 
       def first_path_available(name)
-        priority = File.join(template_priority_path, "#{name}.#{template_extension}")
         default = File.join(template_path, "#{name}.#{template_extension}")
-        File.exists?(priority) ? priority : default
+        priority =
+          if template_priority_path
+            File.join(template_priority_path, "#{name}.#{template_extension}")
+          end
+
+        priority && File.exist?(priority) ? priority : default
       end
 
       # Method should track lib/mustache/settings.rb from Mustache project.

test/helper.rb

@@ -1,18 +1,20 @@
 require 'rubygems'
 require 'rack/test'
-require 'test/unit'
 require 'shoulda'
-require 'mocha/setup'
-require 'fileutils'
+require 'minitest/autorun'
 require 'minitest/reporters'
 require 'minitest/spec'
+require 'mocha/setup'
+require 'fileutils'
 require 'tmpdir'
 
 # Silence locale validation warning
 require 'i18n'
 I18n.enforce_available_locales = false
 
-MiniTest::Reporters.use!
+Minitest::Reporters.use! [
+  Minitest::Reporters::DefaultReporter.new({color: true})
+]
 
 dir = File.dirname(File.expand_path(__FILE__))
 $LOAD_PATH.unshift(File.join(dir, '..', 'lib'))
@@ -62,14 +64,29 @@ def normal(text)
   text
 end
 
-# test/spec/mini 3
-# http://gist.github.com/25455
-# chris@ozmm.org
-# file:lib/test/spec/mini.rb
+# The following configuration originates from this gist:
+
+#     http://gist.github.com/25455
+#
+# But it has been modified since it was first committed. It allows you to
+# write tests with an RSpec-like DSL:
+#
+#    context "my test context" do
+#      setup do
+#        # My test setup
+#      end
+#
+#      teardown do
+#        # My test teardown
+#      end
+#
+#      test "some functionality" do
+#        assert true
+#      end
+#    end
 def context(*args, &block)
   return super unless (name = args.first) && block
-  require 'test/unit'
-  klass = Class.new(defined?(ActiveSupport::TestCase) ? ActiveSupport::TestCase : Test::Unit::TestCase) do
+  klass = Class.new(Minitest::Test) do
     def self.test(name, &block)
       define_method("test_#{name.gsub(/\W/, '_')}", &block) if block
     end
@@ -85,10 +102,13 @@ def context(*args, &block)
       define_method(:teardown, &block)
     end
   end
+
   (
-  class << klass;
-    self
-  end).send(:define_method, :name) { name.gsub(/\W/, '_') }
+    class << klass;
+      self
+    end
+  ).send(:define_method, :name) { name.gsub(/\W/, '_') }
+
   $contexts << klass
   klass.class_eval &block
 end

test/test_allow_editing.rb

@@ -3,87 +3,107 @@ require File.expand_path(File.join(File.dirname(__FILE__), 'helper'))
 
 context "Precious::Views::Editing" do
   include Rack::Test::Methods
+
   setup do
-    @path    = cloned_testpath('examples/revert.git')
+    @path = cloned_testpath('examples/revert.git')
     Precious::App.set(:gollum_path, @path)
+    Precious::App.set(:wiki_options, {allow_editing: true, allow_uploads: true})
     @wiki = Gollum::Wiki.new(@path)
   end
 
   teardown do
+    Precious::App.set(:wiki_options, {allow_editing: true, allow_uploads: true})
     FileUtils.rm_rf(@path)
   end
 
-  test "creating page is blocked" do
-    Precious::App.set(:wiki_options, { allow_editing: false})
-    post "/gollum/create", :content => 'abc', :page => "D",
-         :format             => 'markdown', :message => 'def'
-    assert !last_response.ok?
+  test 'creating pages is not blocked' do
+    post '/gollum/create',
+      content: 'abc',
+      format: 'markdown',
+      message: 'def',
+      page: 'D'
 
-    page = @wiki.page('D')
-    assert page.nil?
+    assert_equal last_response.status, 302
+
+    refute_nil @wiki.page('D')
+  end
+
+  test 'creating pages is blocked' do
+    Precious::App.set(:wiki_options, {allow_editing: false, allow_uploads: false})
+
+    post '/gollum/create',
+      content: 'abc',
+      format: 'markdown',
+      message: 'def',
+      page: 'D'
+
+    assert last_response.body.include? 'Forbidden. This wiki is set to no-edit mode.'
+
+    refute last_response.ok?
+
+    assert_nil @wiki.page('D')
   end
 
   test ".redirects.gollum file should not be accessible" do
-    Precious::App.set(:wiki_options, { allow_editing: true, allow_uploads: true })
     get '/.redirects.gollum'
     assert_match /Accessing this resource is not allowed/, last_response.body
   end
-  
+
   test ".redirects.gollum file should not be editable" do
-    Precious::App.set(:wiki_options, { allow_editing: true, allow_uploads: true })
     get '/gollum/edit/.redirects.gollum'
     assert_match /Changing this resource is not allowed/, last_response.body
   end
 
   test "frontend links for editing are not blocked" do
-    Precious::App.set(:wiki_options, { allow_editing: true, allow_uploads: true })
     get '/A'
 
-    assert_match /Delete this Page/, last_response.body, "'Delete this Page' link is blocked in page template"
-    assert_match /New/,              last_response.body, "'New' button is blocked in page template"
-    assert_match /Upload\b/,         last_response.body, "'Upload' link is blocked in page template"
-    assert_match /Rename/,           last_response.body, "'Rename' link is blocked in page template"
-    assert_match /Edit/,             last_response.body, "'Edit' link is blocked in page template"
+    assert last_response.body.include? "Delete this Page"
+    assert last_response.body.include? "New"
+    assert last_response.body.include? "<span>Upload</span>"
+    assert last_response.body.include? "Rename"
+    assert last_response.body.include? "Edit"
 
     get '/gollum/overview'
 
-    assert_match /New/, last_response.body, "'New' link is blocked in pages template"
+    assert last_response.body.include? "New"
 
     get '/gollum/history/A'
 
-    assert_no_match /Edit/, last_response.body, "'Edit' link is not blocked in history template"
+    refute last_response.body.include? "Edit"
 
-    get '/gollum/compare/A/fc66539528eb96f21b2bbdbf557788fe8a1196ac..b26b791cb7917c4f37dd9cb4d1e0efb24ac4d26f'
+    get '/gollum/compare/A/fc665395..b26b791c'
 
-    assert_no_match /Edit Page/,             last_response.body, "'Edit Page' link is not blocked in compare template"
-    assert_match /Revert Changes/,        last_response.body, "'Revert Changes' link is blocked in compare template"
+    refute last_response.body.include? "Edit Page"
+
+    assert last_response.body.include? "Revert Changes"
   end
 
   test "frontend links for editing blocked" do
-    Precious::App.set(:wiki_options, { allow_editing: false })
+    Precious::App.set(:wiki_options, {allow_editing: false, allow_uploads: false})
+
     get '/A'
 
-    assert_no_match /Delete this Page/, last_response.body, "'Delete this Page' link not blocked in page template"
-    assert_no_match /New/,              last_response.body, "'New' button not blocked in page template"
-    assert_no_match /Upload\b/,         last_response.body, "'Upload' link not blocked in page template"
-    assert_no_match /Rename/,           last_response.body, "'Rename' link not blocked in page template"
-    assert_no_match /Edit/,             last_response.body, "'Edit' link not blocked in page template"
+    refute last_response.body.include? "Delete this Page"
+    refute last_response.body.include? "<span>Upload</span>"
+    refute last_response.body.include? "Rename"
+    refute last_response.body.include? "Edit"
+    refute last_response.body.include? "New"
 
     get '/gollum/overview'
 
-    assert_no_match /New/, last_response.body, "'New' link not blocked in pages template"
+    refute last_response.body.include? "New"
 
     get '/gollum/history/A'
 
-    assert_no_match /Edit/, last_response.body, "'Edit' link not blocked in history template"
+    refute last_response.body.include? "Edit"
 
-    get '/gollum/compare/A/fc66539528eb96f21b2bbdbf557788fe8a1196ac..b26b791cb7917c4f37dd9cb4d1e0efb24ac4d26f'
+    get '/gollum/compare/A/fc665395..b26b791c'
 
-    assert_no_match /Edit Page/,             last_response.body, "'Edit Page' link not blocked in compare template"
-    assert_no_match /Revert Changes/,        last_response.body, "'Revert Changes' link not blocked in compare template"
+    refute last_response.body.include? "Edit Page"
+    refute last_response.body.include? "Revert Changes"
   end
 
   def app
     Precious::App
   end
-end
+end

test/test_app.rb

@@ -14,7 +14,7 @@ context "Frontend" do
   teardown do
     FileUtils.rm_rf(@path)
   end
-  
+
   test "utf-8 kcode" do
     assert_equal 'μ†ℱ'.scan(/./), ["μ", "†", "ℱ"]
   end
@@ -104,21 +104,21 @@ EOF
     page_2 = @wiki.page(page_1.name)
     assert_equal 'abc', page_2.raw_data
     assert_equal 'def', page_2.version.message
-    assert_not_equal page_1.version.sha, page_2.version.sha
+    refute_equal page_1.version.sha, page_2.version.sha
   end
-  
+
   test "edit page fails when page is outdated (edit collision)" do
     page = @wiki.page('A')
     old_sha = page.sha
     post "/gollum/edit/A", :content => 'abc', :page => 'A',
          :format => page.format, :message => 'def', :etag => old_sha
     assert last_response.ok?
-    
+
     @wiki.clear_cache
     page = @wiki.page('A')
     new_sha = page.sha
-    assert_not_equal old_sha, new_sha
-    
+    refute_equal old_sha, new_sha
+
     post "/gollum/edit/A", :content => 'def', :page => 'A',
          :format => page.format, :message => 'def', :etag => old_sha
     assert_equal last_response.status, 412
@@ -134,7 +134,7 @@ EOF
     page_2 = @wiki.page(page_1.name)
     assert_equal 'abc', page_2.raw_data
     assert_equal '[no message]', page_2.version.message
-    assert_not_equal page_1.version.sha, page_2.version.sha
+    refute_equal page_1.version.sha, page_2.version.sha
   end
 
   test "edit page with slash" do
@@ -165,12 +165,12 @@ EOF
     assert_equal 'header', header_2.raw_data
     assert_equal 'footer', foot_2.raw_data
     assert_equal 'def', foot_2.version.message
-    assert_not_equal foot_1.version.sha, foot_2.version.sha
-    assert_not_equal header_1.version.sha, header_2.version.sha
+    refute_equal foot_1.version.sha, foot_2.version.sha
+    refute_equal header_1.version.sha, header_2.version.sha
 
     assert_equal 'sidebar', side_2.raw_data
     assert_equal 'def', side_2.version.message
-    assert_not_equal side_1.version.sha, side_2.version.sha
+    refute_equal side_1.version.sha, side_2.version.sha
     assert_equal commits, @wiki.repo.commits('master').size
   end
 
@@ -187,7 +187,7 @@ EOF
     page_2 = @wiki.page('C')
     assert_equal "INITIAL\n\nSPAM2\n", page_2.raw_data
     assert_equal 'def', page_2.last_version.message
-    assert_not_equal page_1.version.sha, page_2.version.sha
+    refute_equal page_1.version.sha, page_2.version.sha
   end
 
   test "rename preserves format" do
@@ -222,7 +222,7 @@ EOF
 
   test "renames page in subdirectory" do
     page_1 = @wiki.page("G/H")
-    assert_not_equal page_1, nil
+    refute_equal page_1, nil
     post "/gollum/rename/G/H", :rename => "/I/C", :message => 'def'
 
     follow_redirect!
@@ -234,12 +234,12 @@ EOF
     page_2 = @wiki.page('I/C')
     assert_equal "INITIAL\n\nSPAM2\n", page_2.raw_data
     assert_equal 'def', page_2.last_version.message
-    assert_not_equal page_1.version.sha, page_2.version.sha
+    refute_equal page_1.version.sha, page_2.version.sha
   end
 
   test "renames page relative in subdirectory" do
     page_1 = @wiki.page("G/H")
-    assert_not_equal page_1, nil
+    refute_equal page_1, nil
     post "/gollum/rename/G/H", :rename => "K/C", :message => 'def'
 
     follow_redirect!
@@ -251,7 +251,7 @@ EOF
     page_2 = @wiki.page('G/K/C')
     assert_equal "INITIAL\n\nSPAM2\n", page_2.raw_data
     assert_equal 'def', page_2.last_version.message
-    assert_not_equal page_1.version.sha, page_2.version.sha
+    refute_equal page_1.version.sha, page_2.version.sha
   end
 
   test "creates page" do
@@ -320,7 +320,7 @@ EOF
     name = "#{dir}/bar"
     get "/gollum/create/#{name}"
     assert_match(/\/#{dir}/, last_response.body)
-    assert_no_match(/[^\/]#{dir}/, last_response.body)
+    refute_match(/[^\/]#{dir}/, last_response.body)
   end
 
   test "create with template succeed if template exists" do
@@ -390,7 +390,7 @@ EOF
     post '/gollum/edit/', :content => 'edit_msg',
          :page              => page, :path => path, :message => ''
     page_e = @wiki.page(::File.join(path,page))
-    assert_equal nil, page_e
+    assert_nil page_e
   end
 
   test "edit allows changing format" do
@@ -446,23 +446,31 @@ EOF
 
     @wiki.clear_cache
     page = @wiki.page(name)
-    assert_not_equal 'abc', page.raw_data
+    refute_equal 'abc', page.raw_data
   end
-  
+
   test "uploading is not allowed unless explicitly enabled" do
     temp_upload_file = Tempfile.new(['upload', '.file']) << 'abc'
     temp_upload_file.close
-    post "/gollum/upload_file", :file => Rack::Test::UploadedFile.new(::File.open(temp_upload_file))
+
+    Precious::App.set(
+      :wiki_options,
+      {allow_uploads: false, per_page_uploads: false}
+    )
+
+    post '/gollum/upload_file',
+      file: Rack::Test::UploadedFile.new(File.open(temp_upload_file))
+
     assert_equal 405, last_response.status
   end
-  
+
   test "upload a file with mode dir" do
     temp_upload_file = Tempfile.new(['upload', '.file']) << 'abc'
     temp_upload_file.close
     Precious::App.set(:wiki_options, {allow_uploads: true})
-  
+
     post "/gollum/upload_file", :file => Rack::Test::UploadedFile.new(::File.open(temp_upload_file))
-  
+
     assert_equal 302, last_response.status # redirect is expected
     @wiki.clear_cache
     file = @wiki.file("uploads/#{::File.basename(temp_upload_file.path)}")
@@ -475,7 +483,7 @@ EOF
     temp_upload_file.close
     Precious::App.set(:wiki_options, {allow_uploads: true, per_page_uploads: true})
     post "/gollum/upload_file", {:file => Rack::Test::UploadedFile.new(::File.open(temp_upload_file))}, {'HTTP_REFERER' => 'http://localhost:4567/Home.md', 'HTTP_HOST' => 'localhost:4567'}
-    
+
     assert_equal 302, last_response.status # redirect is expected
     @wiki.clear_cache
     # Find the file in a page-specific subdir (here: Home), based on referer
@@ -483,13 +491,13 @@ EOF
     assert_equal 'abc', file.raw_data
     Precious::App.set(:wiki_options, {allow_uploads: false, per_page_uploads: false})
   end
-  
+
   test "upload a file with https referer" do
     temp_upload_file = Tempfile.new(['https_upload', '.file']) << 'abc'
     temp_upload_file.close
     Precious::App.set(:wiki_options, {allow_uploads: true, per_page_uploads: true})
     post "/gollum/upload_file", {:file => Rack::Test::UploadedFile.new(::File.open(temp_upload_file))}, {'HTTP_REFERER' => 'https://localhost:4567/Home.md', 'HTTP_HOST' => 'localhost:4567'}
-    
+
     assert_equal 302, last_response.status # redirect is expected
     @wiki.clear_cache
     # Find the file in a page-specific subdir (here: Home), based on referer
@@ -497,8 +505,8 @@ EOF
     assert_equal 'abc', file.raw_data
     Precious::App.set(:wiki_options, {allow_uploads: false, per_page_uploads: false})
   end
-  
-  
+
+
   test "guard against uploading an existing file" do
     temp_upload_file = Tempfile.new(['upload', '.file']) << 'abc'
     temp_upload_file.close
@@ -510,7 +518,7 @@ EOF
     assert_equal 409, last_response.status
     Precious::App.set(:wiki_options, {allow_uploads: false})
   end
-  
+
   test "delete a page" do
     name = "deleteme"
     post "/gollum/create", :content => 'abc', :page => name,
@@ -522,7 +530,7 @@ EOF
 
     @wiki.clear_cache
     page = @wiki.page(name)
-    assert_equal nil, page
+    assert_nil page
   end
 
   test "previews content" do
@@ -546,7 +554,7 @@ EOF
 
     @wiki.clear_cache
     page2 = @wiki.page('B')
-    assert_not_equal page1.version.sha, page2.version.sha
+    refute_equal page1.version.sha, page2.version.sha
     assert_equal "INITIAL", page2.raw_data.strip
     assert_equal "Revert commit 7c45b5f", page2.version.message
   end
@@ -560,7 +568,7 @@ EOF
 
     @wiki.clear_cache
     page2 = @wiki.page('A')
-    assert_not_equal page1.version.sha, page2.version.sha
+    refute_equal page1.version.sha, page2.version.sha
     assert_equal "INITIAL", page2.raw_data.strip
   end
 
@@ -574,7 +582,7 @@ EOF
     page2 = @wiki.page('A')
     assert_equal page1.version.sha, page2.version.sha
   end
-  
+
 =begin
   # redirects are now handled by class MapGollum in bin/gollum
   # they should be set in config.ru
@@ -622,7 +630,7 @@ EOF
                      { :name => 'user1', :email => 'user1' });
 
     get page
-    assert_no_match /custom.js/, last_response.body
+    refute_match /custom.js/, last_response.body
   end
 
   test "add custom.js if setting" do
@@ -640,7 +648,7 @@ EOF
 
   test "don't allow changing custom js or css" do
     Precious::App.set(:wiki_options, { :js => true, :css => true })
-  
+
     ['create', 'edit'].each do |route|
       ['.css', '.js'].each do |ext|
         get "/gollum/#{route}/custom#{ext}"
@@ -673,7 +681,7 @@ EOF
          :page    => 'Multibyte', :format => :markdown, :message => 'mesg'
 
     page = @wiki.page('Multibyte')
-    
+
     post "/gollum/edit/Multibyte",
          :content => 'りんご', :header => 'みかん', :footer => 'バナナ', :sidebar => 'スイカ',
          :page    => 'Multibyte', :format => :markdown, :message => 'mesg', :etag => page.sha
@@ -691,7 +699,7 @@ EOF
     get "A"
 
     assert last_response.ok?
-    assert_no_match /meta name="robots" content="noindex, nofollow"/, last_response.body
+    refute_match /meta name="robots" content="noindex, nofollow"/, last_response.body
 
     get "A/fc66539528eb96f21b2bbdbf557788fe8a1196ac"
 
@@ -870,10 +878,10 @@ context "Frontend with lotr" do
   test "show revision of specific file" do
     old_sha = "df26e61e707116f81ebc6b935ec6d1676b7e96c4"
     update_sha = "f803c64d11407b23797325e3843f3f378b78f611"
-    
+
     get "Data.csv/#{old_sha}"
     assert last_response.ok?
-    assert_no_match /Samwise,Gamgee/, last_response.body
+    refute_match /Samwise,Gamgee/, last_response.body
 
     get "Data.csv/#{update_sha}"
     assert last_response.ok?
@@ -918,7 +926,7 @@ context "Frontend with page-file-dir" do
     name = "#{dir}/baz"
     get "/gollum/create/#{name}"
     assert_match(/\/#{dir}/, last_response.body)
-    assert_no_match(/[^\/]#{dir}/, last_response.body)
+    refute_match(/[^\/]#{dir}/, last_response.body)
   end
 
   test "use custom.css from page-file-dir path if page-file-dir is set" do
@@ -959,7 +967,7 @@ end
 
 context "Frontend with empty repo" do
   include Rack::Test::Methods
-  
+
   setup do
     @path = cloned_testpath("examples/empty.git")
     @wiki = Gollum::Wiki.new(@path)
@@ -970,11 +978,11 @@ context "Frontend with empty repo" do
   teardown do
     FileUtils.rm_rf(@path)
   end
-  
+
   def app
     Precious::App
   end
-  
+
   test 'previews content on the first page of an empty wiki' do
     post '/gollum/preview', :content => 'abc', :format => 'markdown'
     assert last_response.ok?
@@ -986,12 +994,12 @@ context "Frontend with empty repo" do
     assert_equal '/gollum/create/Home', last_request.fullpath
     assert last_response.ok?
   end
-  
+
 end
 
 context 'Frontend with base path' do
   include Rack::Test::Methods
-  
+
   setup do
     @path = cloned_testpath("examples/lotr.git")
     @wiki = Gollum::Wiki.new(@path)
@@ -1003,24 +1011,24 @@ context 'Frontend with base path' do
   teardown do
     FileUtils.rm_rf(@path)
   end
-  
+
   test 'page with base path' do
     get '/wiki/Home'
     assert last_response.ok?
   end
-  
+
   test 'base path mathjax assets' do
     get '/wiki/Home'
     assert last_response.ok?
     assert last_response.body.include?('<script defer src="/wiki/gollum/assets/mathjax/MathJax.js?config=')
   end
-  
+
   test 'compare view' do
     get '/wiki/gollum/compare/Bilbo-Baggins.md?versions[]=f25eccd98e9b667f9e22946f3e2f945378b8a72d&versions[]=5bc1aaec6149e854078f1d0f8b71933bbc6c2e43'
     follow_redirect!
     assert last_response.ok?
     assert_equal '/wiki/gollum/compare/Bilbo-Baggins.md/5bc1aaec6149e854078f1d0f8b71933bbc6c2e43...f25eccd98e9b667f9e22946f3e2f945378b8a72d', last_request.fullpath
-    
+
     get '/wiki/gollum/compare/Bilbo-Baggins.md?versions[]=f25eccd98e9b667f9e22946f3e2f945378b8a72d'
     follow_redirect!
     assert last_response.ok?
@@ -1031,7 +1039,7 @@ context 'Frontend with base path' do
     assert last_response.ok?
     assert_equal '/wiki/gollum/history/Bilbo-Baggins.md', last_request.fullpath
   end
-  
+
   def app
     Precious::MapGollum.new(@base_path)
   end

test/test_migrate.rb

@@ -1,28 +1,6 @@
 # ~*~ encoding: utf-8 ~*~
 require File.expand_path(File.join(File.dirname(__FILE__), 'helper'))
 
-# Original contents of Subdir/Foo.md:
-# waa
-# [[Samwi]]
-# [[samwise gamgee.mediaWiki]]
-# [[Samwise Gamgee.mediawiki]]
-# [[Samwise Gamgee]]
-# [[Test|Samwise Gamgee#Anchor]]
-# [[Waaa|Test]]
-# [[Zaa]]
-
-# Contents of Subdir/Foo.md after successful tag migration
-result = <<EOF
-waa
-[[Samwi]]
-[[/Samwise Gamgee.mediawiki]]
-[[/Samwise Gamgee.mediawiki]]
-[[/Samwise Gamgee.md]]
-[[Test|/Samwise Gamgee.md#Anchor]]
-[[Waaa|/Bar/Test.md]]
-[[Subsub/Zaa.md]]
-EOF
-
 def load_script(**args)
   settings = {
     :run_silent => true,
@@ -31,47 +9,70 @@ def load_script(**args)
     :hyphenate => false,
     :page_file_dir => nil,
   }.merge(args)
-  
-  settings.each do |const, val|
-    const_name = const.to_s.upcase
-    Object.const_set(const_name, val) unless Object.const_defined?(const_name) && Object.const_get(const_name) == val
+
+  settings.each do |setting, val|
+    variable_name = :"@@#{setting.to_s}"
+
+    unless Object.class_variable_defined?(variable_name) && Object.class_variable_get(variable_name) == val
+      Object.class_variable_set(variable_name, val)
+    end
   end
-  
+
   script_path = File.expand_path(File.join(File.dirname(__FILE__), '../', 'bin', 'gollum-migrate-tags'))
-  
+
   Dir.chdir(@path) do
     load script_path
-  end  
+  end
 end
 
 unless ENV['CI']
-
   context '4.x -> 5.x tag migrator' do
     include Rack::Test::Methods
 
     setup do
       @path = cloned_testpath("examples/lotr_migration.git")
     end
-    
+
     test 'repair broken links' do
+      # The original contents of Subdir/Foo.md:
+      #
+      # waa
+      # [[Samwi]]
+      # [[samwise gamgee.mediaWiki]]
+      # [[Samwise Gamgee.mediawiki]]
+      # [[Samwise Gamgee]]
+      # [[Test|Samwise Gamgee#Anchor]]
+      # [[Waaa|Test]]
+      # [[Zaa]]
+      #
+      # The contents will be updated after running the migration script.
       load_script
-    
-      f = ::File.new(::File.join(@path, 'Subdir/Foo.md'), 'r')
-      assert_equal result, f.read
+
+      file = ::File.new(::File.join(@path, 'Subdir/Foo.md'), 'r')
+      assert_equal <<~FILE_CONTENTS, file.read
+        waa
+        [[Samwi]]
+        [[/Samwise Gamgee.mediawiki]]
+        [[/Samwise Gamgee.mediawiki]]
+        [[/Samwise Gamgee.md]]
+        [[Test|/Samwise Gamgee.md#Anchor]]
+        [[Waaa|/Bar/Test.md]]
+        [[Subsub/Zaa.md]]
+      FILE_CONTENTS
     end
-    
-    test 'change spaced filenames to hyphenated filenames' do    
+
+    test 'change spaced filenames to hyphenated filenames' do
       load_script(hyphenate: true)
-    
+
       f = ::File.new(::File.join(@path, 'Home.textile'), 'r')
       output = f.read
       assert_equal true, output.include?('[[Bilbo-Baggins.md]]')
       assert_equal true, output.include?('[[evil|Mordor/Eye-Of-Sauron.md]]')
     end
-    
-    test 'migration with page file dir' do      
+
+    test 'migration with page file dir' do
       load_script(page_file_dir: 'Subdir')
-      
+
       f = ::File.new(::File.join(@path, 'Subdir/Foo.md'), 'r')
       output = f.read
       assert_equal true, output.include?('[[Subsub/Zaa.md]]')
@@ -82,5 +83,4 @@ unless ENV['CI']
       FileUtils.rm_rf(@path)
     end
   end
-
-end
+end

test/test_page_view.rb

@@ -35,7 +35,7 @@ context "Precious::Views::Page" do
     @view.instance_variable_set :@content, page.formatted_data
     @view.instance_variable_set :@h1_title, false
 
-    assert_include @view.breadcrumb, "数学 📘"
+    assert_includes @view.breadcrumb, "数学 📘"
   end
 
   test 'page <title> is the page header from content, if present' do

test/test_template_cascade.rb

@@ -1,43 +1,59 @@
 # ~*~ encoding: utf-8 ~*~
 require File.expand_path(File.join(File.dirname(__FILE__), 'helper'))
 
-class TestTemplateCascade < Minitest::Unit::TestCase
+context "Precious::Views::TemplateCascade" do
   include Rack::Test::Methods
 
-  def setup
+  setup do
     @path = cloned_testpath('examples/lotr.git')
     Precious::App.set(:gollum_path, @path)
-    Precious::App.set(:wiki_options, {template_dir: testpath('examples/template_cascade')})
+    Precious::App.set(
+      :wiki_options,
+      {template_dir: testpath('examples/template_cascade')}
+    )
     @wiki = Gollum::Wiki.new(@path)
   end
 
-  def teardown
+  teardown do
     FileUtils.rm_rf(@path)
+
+    Precious::App.set(:wiki_options, {template_dir: nil})
+
+    # The following line has been added to avoid order-dependent test failures.
+    # We saw issues where the class variable `@@template_priority_path` was not
+    # being reset between test cases.
+    Precious::Views::TemplateCascade.class_variable_set(
+      :@@template_priority_path,
+      nil
+    )
   end
 
   def app
-    Precious::App
+    Precious::App.new
   end
 
-  def test_overridden_page_template_is_used
+  test "overridden_page_template_is_used" do
     get '/Home'
 
     assert last_response.body.include?('PAGE_OVERRIDE')
   end
 
-  def test_overridden_navbar_partial_is_used
+  test "test_overridden_navbar_partial_is_used" do
     get '/Home'
 
     assert last_response.body.include?('NAVBAR_OVERRIDE')
   end
 
-  def test_overridden_templates_are_ignore_without_template_dir_set
+  test "test_overridden_templates_are_ignore_without_template_dir_set" do
     Precious::App.set(:wiki_options, {template_dir: nil})
 
     get '/Home'
+
     assert_equal '/Home', last_request.fullpath
+
     assert last_response.ok?
-    assert_no_match /PAGE_OVERRIDE/, last_response.body
-    assert_no_match /NAVBAR_OVERRIDE/, last_response.body
+
+    refute_match /PAGE_OVERRIDE/, last_response.body
+    refute_match /NAVBAR_OVERRIDE/, last_response.body
   end
 end